Angle extension milling head

Abstract

This utility model discloses an extendable angle milling head, including a milling head holder, an extension section, a milling cutter mounting section, and a vibration damping section. The milling head holder is detachably mounted on the machine spindle, and the milling cutter mounting section is detachably mounted on the milling head holder. The extension section is disposed on the milling head holder and adjusts the distance between the milling cutter mounting section and the milling head holder to extend the length of the milling head. The vibration damping section is disposed on the milling cutter mounting section and absorbs the vibration energy generated during milling. Advantages: By setting the milling head into a three-section structure including the milling head holder, the extension section, and the milling cutter mounting section, the length of the milling head can be adjusted using extension sections of different lengths when machining deep holes, meeting the machining needs of deep holes or long-distance machining areas, expanding the machining range, and reducing machining costs. Furthermore, the vibration damping section disposed in the milling cutter mounting section absorbs the vibration energy generated during milling, reduces the vibration amplitude, improves machining accuracy, reduces surface roughness, and improves the surface quality of the workpiece.

Description

Technical Field

[0001] This utility model specifically relates to an extendable angle milling head. Background Technology

[0002] Angle milling heads are core components in CNC machine tools for multi-angle machining and are widely used in aerospace, automobile manufacturing, mold processing and other fields.

[0003] Traditional angle milling heads typically have a fixed length, which cannot be dynamically adjusted according to the size or depth requirements of the workpiece. For example, when machining deep cavity parts or complex curved surfaces, a fixed-length milling head may result in a machining blind zone due to insufficient stroke, or it may require the replacement of milling heads of different specifications, leading to high operating costs. Furthermore, the fixed-length design of the milling head also limits the equipment's versatility for different workpieces, increasing the company's equipment procurement costs.

[0004] Furthermore, during high-speed milling, especially when machining deep and small holes, the ultra-long angle head will cause vibrations due to the cutting force of the tool and the interaction between the milling cutter and the workpiece. This will lead to reduced machining accuracy, poor surface quality, increased tool wear, and even mechanical fatigue.

[0005] Although there are some improved angle head products, the problems of vibration and stability during extended use have not been effectively solved, making it difficult to meet the processing requirements of high-precision and complex workpieces.

[0006] Therefore, there is a need for a milling head that can be easily lengthened and that can reduce tool vibration during machining. Utility Model Content

[0007] The technical problem to be solved by this utility model is that the existing angle milling head with fixed length is not suitable for different processing environments, as mentioned in the background art, and the vibration of the existing milling head reduces the processing accuracy during use.

[0008] To address the aforementioned technical problems, an extendable angle milling head is proposed; this is achieved through the following technical solution: An extendable angle milling head includes a milling head holder, an extension section, a milling cutter mounting section, and a vibration damping section. The milling head holder is detachably mounted on the equipment spindle. The milling cutter mounting section for mounting the milling cutter is detachably mounted on the milling head holder. The extension section is disposed on the milling head holder, and the extension section adjusts the distance between the milling cutter mounting section and the milling head holder to extend the length of the milling head. The vibration damping section is disposed on the milling cutter mounting section, and the vibration damping section absorbs the vibration energy generated during milling cutter cutting.

[0009] In a preferred embodiment of the present invention, the extension part includes an extension tube and a connecting component. The connecting component is disposed inside the extension tube and can be rotated controllably within the extension tube. The extension tube connects the milling head holder and the milling cutter mounting part through the connecting component. The extension part is designed to be easily installed between the milling head holder and the milling cutter mounting part when needed, thereby adjusting the length of the milling head and making it highly adaptable.

[0010] In a preferred embodiment of the present invention, the extension tube includes a connecting plug and a connecting tube, and a bearing mounting groove is provided in the connecting plug and the connecting tube. The connection of the connecting plug and the connecting tube facilitates the connection of the extension part with the milling head holder and the milling cutter mounting part.

[0011] In a preferred embodiment of the present invention, the connecting component includes a transmission rod and a connector. The connector is located at both ends of the transmission rod, and the transmission rod connects the milling head holder and the milling cutter mounting part through the connector. The connection component facilitates a stable connection between the extension part and the milling head holder and the milling cutter mounting part, thereby improving the stability of use.

[0012] In a preferred embodiment of the present invention, a transmission groove and a transmission clamp are respectively provided on the connectors at both ends of the transmission rod. This arrangement facilitates stable power transmission after the extension is connected to the milling head holder and the milling cutter mounting part, ensuring stable rotation of the milling cutter.

[0013] In a preferred embodiment of the present invention, a connector is provided on both the milling head holder and the milling cutter mounting part. A transmission chuck is provided on the connector on the milling head holder, and a transmission slot is provided on the connector on the milling cutter mounting part. The transmission chuck and the transmission slot are detachably coupled. This arrangement facilitates stable power transmission after the extension part is connected to the milling head holder and the milling cutter mounting part, ensuring stable rotation of the milling cutter.

[0014] In a preferred embodiment of the present invention, the milling cutter mounting part includes a mounting rod and an output cross shaft. The mounting rod is connected to an extension or a milling head shank. The output cross shaft for milling cutter mounting is located at one end of the mounting rod. This arrangement facilitates the installation of the milling cutter and makes it convenient to use.

[0015] In a preferred embodiment of the present invention, the vibration damping part includes a vibration damping pin, a vibration damping hole, an adjusting screw, and an O-ring. The vibration damping hole is located at one end of the milling cutter mounting part where the milling cutter is mounted. The vibration damping pin is located inside the vibration damping hole. The O-ring is located at both ends of the vibration damping pin. The adjusting screw seals the vibration damping hole. The vibration damping part is designed to reduce the shaking of the milling cutter during use and is convenient to use.

[0016] In a preferred embodiment of the present invention, the depth of the damping hole is greater than the length of the damping pin, and the distance the damping pin swings within the damping hole is adjusted by an adjusting screw. This design facilitates adjusting the ease of the damping pin's swing as needed during use, thereby improving the damping effect.

[0017] The advantages of this utility model compared with the prior art are: The technical solution of this utility model sets the milling head as a three-section structure including a milling head holder, an extension section, and a milling cutter mounting section. When machining deep holes, the length of the milling head can be adjusted by using extension sections of different lengths, which meets the machining needs of deep holes or long-distance machining parts, expands the machining range of the machine tool, and can complete the machining of complex workpieces without changing to a special machine tool, thus reducing machining costs. Furthermore, the vibration damping section set in the milling cutter mounting section absorbs the vibration energy generated during milling cutter cutting, reduces the vibration amplitude, improves machining accuracy, reduces the surface roughness of the machined surface, and improves the surface quality of the workpiece. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present application (including the extension). Figure 2 This is a three-dimensional schematic diagram of the present application (excluding the extension portion); Figure 3 A three-dimensional schematic diagram of a milling head holder; Figure 4 This is a partial sectional view of the extension. Figure 5 This is a schematic diagram showing the connection between the transmission slot and the transmission head. Figure 6 Exploded view of the extension section; Figure 7 This is a three-dimensional schematic diagram of the milling cutter mounting section; Figure 8 Exploded view of the milling cutter mounting section; Explanation of reference numerals in the attached drawings: 1-milling head holder, 11-connecting body, 2-extension part, 21-extension tube, 22-connecting plug, 23-connecting insert, 24-bearing mounting slot, 3-connecting assembly, 31-transmission rod, 32-connector, 33-transmission slot, 34-transmission clip, 35-bearing, 36-tightening nut, 37-tightening thread, 4-milling cutter mounting part, 41-mounting rod, 42-output horizontal shaft, 43-transmission worm gear, 5-vibration damping part, 51-vibration damping pin, 52-vibration damping hole, 53-adjusting screw, 54-O-ring. Detailed Implementation

[0019] The following will refer to the appendix in the embodiments of this utility model. Figure 1-8 The technical solutions in the embodiments of this utility model will be described in detail below. Example

[0020] like Figure 1 , 2As shown in Figure 7, an extendable angle milling head includes a milling head holder 1, an extension part 2, a milling cutter mounting part 4, and a vibration damping part 5. The milling head holder 1 is detachably mounted on the spindle of the equipment. The milling cutter mounting part 4 for milling cutter mounting can be detachably mounted on the milling head holder 1 using the extension part 2. The extension part 2 can adjust the distance between the milling cutter mounting part 4 and the milling head holder (1) to extend the length of the milling head. The vibration damping part 5 is mounted on the milling cutter mounting part 4.

[0021] The main function of the milling head holder 1 is to serve as a carrier connecting the milling head and the equipment spindle. The milling cutter is connected to the equipment spindle using the milling head holder 1.

[0022] The main function of the extension section 2 is to extend the distance between the milling head holder 1 and the milling cutter, which meets the processing needs of deep holes or long-distance processing parts, expands the processing range of the machine tool, and can complete the processing of complex workpieces without changing to a special machine tool. At the same time, the extension section 2 also has a connecting transmission part to ensure the transmission of power.

[0023] The main function of the milling cutter mounting part 4 is to serve as a structure for mounting the milling head, making it convenient to assemble and disassemble the milling head.

[0024] The main function of the vibration damping unit 5 is to absorb the vibration generated during milling cutter cutting, reduce the vibration amplitude, and improve machining accuracy.

[0025] Definition: In this embodiment, the milling head holder 1 is taken as the reference, the connecting cone end of the milling head holder 1 that connects to the spindle of the equipment is the upper end, and the other end where the milling head is installed is the lower end.

[0026] like Figure 1 and 3 As shown, the milling head holder 1 includes a connecting cone that is connected to the spindle, and an angle adjustment table for adjusting the angle of the milling cutter. In addition, the milling head holder 1 also has a connecting body 11 for connecting to the milling cutter mounting part 4.

[0027] The connecting body 11 is a circular tube. The connecting body 11 can be directly connected to the extension part 2 or the milling cutter mounting part 4. There is a circular transmission rod 31 inside the connecting body 11 for transmission. This rod can be connected to the milling cutter mounting part 4 or the extension part 2 to drive the milling cutter. The technical solution of connecting the connecting cone to the spindle and driving the transmission rod 31 to rotate is the prior art and can be used directly.

[0028] In addition, in order to facilitate the connection of the extension part 2 or the milling cutter mounting part 4, an internal thread is provided on the inner side wall of the end of the connecting body 11, so that the extension part 2 or the milling cutter mounting part 4 can be connected to the connecting body 11 by means of the thread.

[0029] like Figure 1 , 4As shown in Figures 5 and 6, the extension section 2 includes an extension tube 21 and a connecting component 3. The connecting component 3 is installed inside the extension tube 21 to realize the power transmission between the milling head holder 1 and the milling cutter mounting section 4. The extension tube 21 is detachably connected to the milling head holder 1 and the milling cutter mounting section 4.

[0030] The extension tube 21 is a hollow metal tube with openings at both ends, and the outer diameter of the extension tube 21 is the same as the outer diameter of the connecting body 11.

[0031] To facilitate the connection between the extension tube 21 and the milling head holder 1 and the milling cutter mounting part 4, an annular boss protrudes from one end of the extension tube 21. This annular boss is named the connecting plug 22. The outer diameter of the connecting plug 22 is smaller than the outer diameter of the extension tube 21. A thread is provided on the surface of the connecting plug 22. The extension tube 21 can be screwed together with the thread at the end of the connecting body 11 using this thread to achieve the screw connection between the two.

[0032] A circular tube is integrally connected to the other end of the extension tube 21. This tube is named the connecting tube 23. The outer diameter of the connecting tube 23 is the same as the outer diameter of the extension tube 21, and the inner diameter is larger than the inner diameter of the extension tube 21. An internal thread is provided on the inner wall of the connecting tube 23. The end of the milling cutter mounting part 4 can be screwed to the connecting tube 23 using this thread to realize the connection between the milling cutter mounting part 4 and the extension part 2.

[0033] To facilitate the installation of the bearing 35 in the connecting assembly 3, an annular groove is recessed on the inner wall of the connecting plug 22 and the connecting tube 23. This groove is named the bearing mounting groove 24, and the bearing 35 is embedded in this bearing mounting groove 24.

[0034] The connecting assembly 3 includes a transmission rod 31 and a connector 32. The transmission rod 31 is a metal rod with a circular cross-section. The outer diameter of the transmission rod 31 is slightly smaller than the inner diameter of the extension tube 21. The transmission rod 31 is inserted into the extension tube 21 and can rotate freely within the extension tube 21. Power is transmitted using the transmission rod 31.

[0035] The connector 32 is a rod with a circular cross-section. The diameter of the connector 32 is slightly smaller than the diameter of the transmission rod 31. The connector 32 is integrally connected to the transmission rod 31 and is located at both ends of the transmission rod 31.

[0036] To facilitate power transmission by the transmission rod 31, a rectangular groove is recessed in the connector 32 at the upper end of the transmission rod 31, which is named the transmission groove 33. A rectangular protrusion is protruded outward on the connector 32 at the lower end of the transmission rod 31, which is named the transmission head 34. The transmission head 34 is sized to fit the transmission groove 33.

[0037] To facilitate stable rotation of the transmission rod 31, a bearing 35 is fitted onto the connector 32 of the transmission rod 31. The inner ring of the bearing 35 is connected to the connector 32, and the outer ring is connected to the bearing mounting groove 24, thus ensuring stable rotation of the transmission rod 31.

[0038] To prevent the transmission rod 31 from axially wobbling during rotation, a step protrudes from one end of the transmission slot 33 on the connector 32. The lower end face of the step contacts the upper surface of the inner ring of the bearing 35. At the same time, a thread is provided on the outer wall of the connector 32 where the transmission slot 34 is provided. This thread is called a tightening thread. A tightening nut 36 is screwed onto this connector 32. The tightening nut 36 is smaller than the inner diameter of the connecting tube 23. After the tightening nut 36 is tightened, the upper end face of the tightening nut 36 presses against the end face of the inner ring of the bearing 35 that is close to it, preventing the transmission rod 31 from wobbling up and down during use.

[0039] To facilitate the connection between the extension part 2 and the milling head holder 1, a transmission clamp 34 is provided on the end face of the transmission rod 31 in the milling head holder 1. When the connector plug 22 of the extension part 2 is screwed onto the connecting body 11, the transmission clamp 34 engages with the transmission slot 33 in the extension part 2 to realize the transmission of power.

[0040] like Figure 1 , 7 As shown in Figure 8, the milling cutter mounting part 4 includes a mounting rod 41, an output horizontal shaft 42, and a transmission worm gear 43. The output horizontal shaft 42 is mounted inside the mounting rod 41, and the milling cutter is detachably mounted inside the output horizontal shaft 42. The mounting rod 41 is connected to the output horizontal shaft 42 via the transmission worm gear 43 to drive the milling cutter.

[0041] The mounting rod 41 is a hollow rod with a circular cross-section. One end of the mounting rod 41 is open, and a connector 22 is integrally provided at the open end. The mounting rod 41 can be screwed together with the extension part 2 using the connector 22.

[0042] The function of the output horizontal shaft 42 is to mount the milling cutter. It is an existing structure. The output horizontal shaft 42 is mounted on the other end of the mounting rod 41 using a bearing. The output horizontal shaft 42 can rotate freely around the bearing.

[0043] To facilitate the rotation of the output horizontal shaft 42, thereby enabling the milling cutter to rotate and perform cutting, a transmission rod 31 is also fixed inside the mounting rod 41 using a bearing 35. The transmission rod 31 has a transmission slot 33 near the connector 22 on the mounting rod 41. At the same time, a worm gear is installed at the other end of the transmission rod 31, which is named the transmission worm gear 43. A transmission worm gear 43 is also fixed on the output horizontal shaft 42. The two transmission worm gears 43 cooperate, and when the transmission rod 31 rotates, it drives the output horizontal shaft 42 to rotate, thereby driving the milling cutter to rotate.

[0044] like Figure 7 and 8 As shown, the vibration damping part 5 includes a vibration damping pin 51, an adjusting screw 53, and an O-ring 54.

[0045] The damping pin 51 is a cylindrical rod made of metal. To facilitate the installation of the damping pin 51, four circular blind holes are evenly recessed on the end face of the mounting rod 41 at the end where the output horizontal shaft 42 is installed. These blind holes are named damping holes 52. The damping pin 51 can be inserted into the damping holes 52.

[0046] To achieve vibration reduction, two rubber O-rings 54 are placed inside the vibration damping hole 52. The two O-rings 54 are in contact with the two ends of the damping pin 51 respectively. When the milling cutter generates vibration, the damping pin 51 tends to move with the vibration. The movement of the damping pin 51 will cause the two O-rings 54 to be subjected to force. The O-rings 54 deform under the force. After deformation, the O-rings 54 convert the vibration energy into heat energy and dissipate it through rebound and oscillation. The whole device plays a damping role, thereby achieving the vibration reduction effect.

[0047] To facilitate adjustment of the damping effect of the damping pin 51, an internal thread is provided at the open end of the damping hole 52. An adjusting screw 53 can be used to close the damping hole 52. After the adjusting screw 53 is screwed into the damping hole 52, the end face of the damping hole 52 contacts the damping pin 51 and the O-ring 54. By rotating the adjusting screw 53, the tightness of the contact between the damping pin 51 and the two O-rings 54 can be adjusted.

[0048] The usage process of this embodiment: When using it, for conventional shallow holes, the milling cutter mounting part 4 can be directly screwed onto the milling head holder 1. Note that when screwing it on, the transmission slot 33 needs to be engaged with the transmission chuck 34 first, and then it can be used. When encountering complex or deep holes, the milling cutter mounting part 4 can be unscrewed, the extension part can be screwed onto the milling head holder 1, and then the other end of the extension part 2 can be screwed onto the milling cutter mounting part 4 (when screwing, the transmission slot 33 needs to be engaged with the transmission chuck 34 first), and then the deep hole can be machined.

[0049] The technical solution of this application can be configured with multiple extensions 2 of different lengths to achieve the purpose of machining holes of different depths, reducing the cost of use and eliminating the need to replace milling heads of different lengths.

[0050] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. An angle extendable milling head, characterized by: The device includes a milling head holder (1), an extension (2), a milling cutter mounting part (4), and a vibration damping part (5). The milling head holder (1) is detachably mounted on the spindle of the equipment. The milling cutter mounting part (4) for milling cutter mounting is detachably mounted on the milling head holder (1). The extension (2) is set on the milling head holder (1). The extension (2) adjusts the distance between the milling cutter mounting part (4) and the milling head holder (1) to extend the length of the milling head. The vibration damping part (5) is set on the milling cutter mounting part (4). The vibration damping part (5) absorbs the vibration energy generated when the milling cutter is cutting.

2. The angle extendable milling head according to claim 1, wherein: The extension part (2) includes an extension tube (21) and a connecting component (3). The connecting component (3) is disposed inside the extension tube (21) and can be rotated controllably inside the extension tube (21). The extension tube (21) is connected to the milling head holder (1) and the milling cutter mounting part (4) through the connecting component (3).

3. The angle extendable milling head according to claim 2, wherein: The extension tube (21) includes a connector (22) and a connector tube (23), and a bearing mounting groove (24) is provided in the connector (22) and the connector tube (23).

4. The angle extendable milling head according to claim 2, wherein: The connecting assembly (3) includes a transmission rod (31) and a connector (32). The connector (32) is located at both ends of the transmission rod (31). The transmission rod (31) is connected to the milling head holder (1) and the milling cutter mounting part (4) through the connector (32).

5. The angle extendable milling head according to claim 4, wherein: Transmission slots (33) and transmission clips (34) are respectively provided on the connectors (32) at both ends of the transmission rod (31).

6. The angle extendable milling head according to claim 5, wherein: A connector (32) is provided on both the milling head holder (1) and the milling cutter mounting part (4). A transmission chuck (34) is provided on the connector (32) in the milling head holder (1), and a transmission slot (33) is provided on the connector (32) in the milling cutter mounting part (4). The transmission chuck (34) and the transmission slot (33) are detachably coupled.

7. The angle extendable milling head according to claim 1, wherein: The milling cutter mounting part (4) includes a mounting rod (41) and an output horizontal shaft (42). The mounting rod (41) is connected to the extension part (2) or the milling head holder (1). The output horizontal shaft (42) for milling cutter mounting is located at one end of the mounting rod (41).

8. The angle extendable milling head according to claim 1, wherein: The vibration damping part (5) includes a vibration damping pin (51), a vibration damping hole (52), an adjusting screw (53), and an O-ring (54). The vibration damping hole (52) is located at one end of the milling cutter mounting part (4) where the milling cutter is mounted. The vibration damping pin (51) is located inside the vibration damping hole (52). The O-ring (54) is located at both ends of the vibration damping pin (51). The adjusting screw (53) closes the vibration damping hole (52).

9. The angle extendable milling head according to claim 8, wherein: The depth of the damping hole (52) is greater than the length of the damping pin (51), and the distance the damping pin (51) swings within the damping hole (52) is adjusted by the adjusting screw (53).

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