A milling cutter device and a circuit board milling device

Abstract

The utility model belongs to the related equipment of circuit board production especially relates to a milling cutter cutter head device and circuit board milling equipment. Through setting up the installation through slot that box body middle part is provided with, the milling cutter fixed plate is provided with in installation through slot bottom, the milling cutter fixed plate sets up in installation through slot bottom, and the milling cutter fixed plate is provided with a plurality of milling cutter mounting ring in array, and the milling cutter mounting ring bottom is provided with the first clamping surface, the milling cutter carrier sets up on the milling cutter mounting ring, and the milling cutter carrier is provided with the milling cutter setting slot to set up the milling cutter, and the milling cutter setting slot first end part is provided with the first elastic clamping part, and the first elastic clamping part end is provided with the first protruding, and the first protruding is provided with the second clamping surface, and through the first elastic connecting portion makes the first clamping surface and the second clamping surface each other limit and each other separate. Through setting up detachable milling cutter carrier, so that when part milling cutter carrier is damaged or needs to be cleaned, can be disassembled to replace and clean, to avoid the whole replacement to cause the production cost to promote.

Description

Technical Field

[0001] This utility model relates to equipment for circuit board production, and particularly to a milling cutter head device and a circuit board milling machine. Background Technology

[0002] A milling cutter is a common piece of equipment in circuit board production. It mainly uses a high-speed rotating milling cutter to perform milling, cutting, engraving and other processing operations on the workpiece. It can achieve precise processing of various complex shapes and sizes to form circuit boards.

[0003] When mass-producing circuit boards, the lifespan of milling cutters is usually very short and they need to be replaced frequently. Therefore, milling cutter changing trays are usually required on the router equipment so that the router equipment can automatically pick up the milling cutters on the changing tray during use, thereby achieving efficient and high-frequency production of circuit boards.

[0004] In existing technologies, the cutter changing disc is equipped with a tool slot for placing the cutter. By placing the cutter in the tool slot, the new and old cutters can be replaced. However, when the cutter is frequently changed, debris often remains in the tool slot, or the tool slot may become damaged and unusable after a long period of use. In addition, the existing cutter changing disc and tool slot are usually integrally formed. Therefore, if only one or more tool slots are damaged, the entire cutter changing disc must be replaced, which increases production costs. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a milling cutter disc device and a circuit board routing device. Specifically, the originally integrated milling cutter replacement disc and tool holder are made replaceable, allowing the milling cutter replacement disc to be repaired simply by replacing the damaged tool holder when some tool holders are damaged.

[0006] The objective of this utility model is achieved through the following technical solution: In a first aspect, this utility model proposes a box body, in which a mounting groove is provided in the middle; a milling cutter fixing plate is provided at the bottom of the mounting groove; the milling cutter fixing plate is provided at the bottom of the mounting groove, and multiple milling cutter mounting rings are arranged in an array on the milling cutter fixing plate, and a first snap-fit ​​surface is provided at the bottom of the milling cutter mounting rings; A milling cutter carrier is mounted on a milling cutter mounting ring. The milling cutter carrier contains a milling cutter positioning groove. A first elastic engaging portion is provided at the first end of the milling cutter positioning groove. A first protrusion is provided at the end of the first elastic engaging portion, and a second engaging surface is provided at the first protrusion. A milling cutter includes a cutter body and a cutter holder, with the cutter holder positioned within a cutter positioning slot. The first and second snap-fit ​​surfaces are mutually positioned, and the first elastic snap-fit ​​portion causes the first and second snap-fit ​​surfaces to separate from each other.

[0007] The box body has a mounting slot in its center; a milling cutter fixing plate is located at the bottom of the mounting slot; the milling cutter fixing plate has multiple milling cutter mounting rings arranged in an array on the mounting slot, and a first engaging surface is located at the bottom of each milling cutter mounting ring; a milling cutter carrier is mounted on the milling cutter mounting rings, and a milling cutter positioning slot is located within the milling cutter carrier; a first elastic engaging portion is located at the first end of the milling cutter positioning slot; a first protrusion is located at the end of the first elastic engaging portion; and a second engaging surface is located on the first protrusion; the milling cutter includes a milling cutter body and a milling cutter holder, with the milling cutter holder located within the milling cutter positioning slot; wherein the first engaging surface and the second engaging surface mutually limit each other, and the first elastic engaging portion allows the first engaging surface and the second engaging surface to disengage from each other. By providing a detachable milling cutter carrier, it is possible to disassemble and replace or clean the milling cutter carrier when some parts are damaged or require cleaning, thus avoiding the increase in production costs caused by replacing the entire carrier.

[0008] In some embodiments, the milling cutter carrier is an elastic structure, and the cross-section of the milling cutter positioning groove is trapezoidal; the milling cutter positioning groove is the second end relative to the first end; the cross-sectional width of the first end is smaller than the cross-sectional width of the second end.

[0009] The elastic structure enables the cutter holder to be snapped in place, thus stabilizing the cutter and preventing it from coming out of the cutter positioning slot.

[0010] In some implementations, the cutter holder is a cylinder, and the diameter of the bottom surface of the cutter holder is larger than the inner diameter of the cutter positioning groove.

[0011] The bottom diameter of the cutter holder is larger than the inner diameter of the cutter positioning groove to achieve elastic locking of the cutter.

[0012] In some embodiments, a second protrusion is provided on the outer side of the milling cutter holder, and a third protrusion is provided in the milling cutter positioning groove. An installation gap is provided between the third protrusions so that the second protrusion extends below the third protrusion through the installation gap, and the second and third protrusions are mutually limited by rotating the milling cutter holder.

[0013] The second and third protrusions are used to interlock the milling cutter and the milling cutter positioning slot, so as to avoid the problem that the milling cutter is easy to fall out of the milling cutter positioning slot during transportation.

[0014] In some implementations, the milling cutter fixing plate and the housing body are integrally formed.

[0015] In some embodiments, at least one second elastic locking portion is provided at the bottom of the mounting slot, and the milling cutter fixing plate is provided with a fifth protrusion so that the second elastic locking portion engages with the fifth protrusion.

[0016] The second elastic snap-fit ​​part of the mounting slot and the fifth protrusion of the milling cutter fixing plate are used to achieve the detachability and fixation of the milling cutter fixing plate and the mounting slot.

[0017] In some embodiments, a push groove is provided on the first side of the box body, and a push rod is provided in the push groove.

[0018] The box can be easily pushed and put in by pushing the slot and the internal push rod.

[0019] In some embodiments, a fixing groove is provided on the second side of the box body, and a thread is provided in the fixing groove to fix the box body by means of the thread.

[0020] The fixing groove and the threads within the fixing groove are used to fix the fixing box to the outside.

[0021] In some implementations, positioning points are provided on the upper surface of the box body.

[0022] The positioning point enables the equipment to visually position the box body when changing the milling cutter.

[0023] Secondly, this utility model also proposes a circuit board routing device, including a milling cutter head device as described in any of the first aspects, and a routing device; the routing device is provided with a replacement groove, the milling cutter head device is disposed in the replacement groove, and the milling cutter is adsorbed by the routing device to form the routing device.

[0024] The beneficial effects of this utility model of a milling cutter head device and a circuit board milling machine are: By incorporating a detachable cutter carrier, the system allows for easy replacement and cleaning of damaged or unused portions of the carrier, avoiding the increased production costs associated with replacing the entire carrier. This solves the problem of existing one-piece cutter carriers and cutter holders where, in the event of damage to only one or more holders, the entire cutter changer disc must be replaced, leading to increased production costs. Attached Figure Description

[0025] Figure 1 This utility model relates to a milling cutter head device and a circuit board milling equipment. The bottom three-dimensional view of the milling cutter head device is shown. Figure 1 ; Figure 2 This is a perspective view of a milling cutter head device and a circuit board milling machine according to the present invention. Figure 3 This is a perspective view of a milling cutter head device and a circuit board milling machine according to the present invention. Figure 4 This is a top view of the housing of a milling cutter head device and a circuit board milling machine according to the present invention. Figure 5This is a corrosion diagram of the milling cutter fixing plate of a milling cutter head device and a circuit board milling equipment according to this utility model. Figure 6 This utility model relates to a milling cutter head device and a circuit board milling equipment. The bottom three-dimensional view of the milling cutter head device is shown. Figure 2 ; Figure 7 This is a perspective view of a milling cutter head device and a circuit board milling machine according to the present invention.

[0026] Figure label: 1. Box body; 11. Mounting slot; 12. Milling cutter fixing plate; 121. Fifth protrusion; 122. Milling cutter mounting ring; 14. Second elastic snap-fit ​​part; 15. Pushing slot; 151. Pushing rod; 16. First side; 17. Second side; 18. Fixing slot; 19. Positioning point; 2. Milling cutter carrier; 21. Milling cutter positioning groove; 211. First end; 212. Second end; 22. First elastic locking part; 23. First protrusion; 231. Second locking surface; 3. Milling cutter; 31. Milling cutter body; 32. Milling cutter holder; 321. Third protrusion. Detailed implementation method: It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of this utility model can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the spirit of this utility model and should not be regarded as an improper limitation of this utility model.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the specific technical solutions of this utility model will be further described in detail below with reference to the accompanying drawings of the embodiments of this utility model. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0028] In the embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] Furthermore, in this embodiment of the invention, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0030] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0031] In embodiments of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0032] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant information in a specific manner.

[0033] Example 1: like Figure 1 As shown, this embodiment proposes a box body 1, with a mounting slot 11 in the middle; a milling cutter fixing plate 12 is provided at the bottom of the mounting slot 11; the milling cutter fixing plate 12 is provided at the bottom of the mounting slot 11, and a plurality of milling cutter mounting rings 122 are arranged in an array on the milling cutter fixing plate 12, and a first snap-fit ​​surface (not shown in the figure) is provided at the bottom of the milling cutter mounting rings 122. The milling cutter carrier 2 is mounted on the milling cutter mounting ring 122. The milling cutter carrier 2 has a milling cutter positioning groove 21. A first elastic engaging portion 22 is provided at the first end 211 of the milling cutter positioning groove 21. A first protrusion 23 is provided at the end of the first elastic engaging portion 22. A second engaging surface 231 is provided at the first protrusion 23. The milling cutter 3 includes a milling cutter body 31 and a milling cutter holder 32, with the milling cutter holder 32 disposed in the milling cutter positioning groove 21; The first snap-fit ​​surface and the second snap-fit ​​surface 231 are mutually positioned, and the first snap-fit ​​surface and the second snap-fit ​​surface 231 are separated from each other by the first elastic snap-fit ​​part 22.

[0034] Specifically, the box body 1 is generally a cuboid, with a mounting slot 11 in the middle. A milling cutter fixing plate 12 is located at the bottom of the mounting slot 11. The milling cutter fixing plate 12 can be integrally formed on the box body or detachably mounted on it. Multiple milling cutter mounting rings 122 are arranged in an array on the milling cutter fixing plate 12. The milling cutter mounting rings 122 can be connected by connecting parts. More specifically, the milling cutter mounting rings 122 are arranged in a 5*15 configuration to meet the needs of most milling cutter machines. The milling cutter mounting rings 122 are usually circular ring structures to fit the base structure of the milling cutter 3. The bottom surface of the milling cutter mounting rings 122 is the first snap-fit ​​surface. Meanwhile, a milling cutter carrier 2 is provided, which is usually a cylindrical structure and can be made of a relatively soft material such as plastic. A milling cutter carrier 2 is provided in each milling cutter mounting ring 122. The milling cutter carrier 2 is engaged and fixed with the milling cutter 3 so that any debris or damage occurs on the milling cutter carrier 2. Thus, the repair of the box body 1 can be completed by replacing the milling cutter carrier 2. Meanwhile, the milling cutter carrier 2 is provided with a milling cutter positioning groove 21, which is used to set the milling cutter 3. The first end 211 of the milling cutter positioning groove 21, usually the bottom end and the end closest to the milling cutter mounting ring 122, is provided with a first elastic locking part 22. The first elastic locking part 22 is provided with a first protrusion 23. During installation, the first protrusion 23 on the first elastic locking part 22 extends into the milling cutter mounting ring 122 from one end and extends out from the other end. After the other end extends out, the first protrusion 23 pops out through the first elastic locking part 22, so that the second locking surface 231 of the first protrusion 23 abuts against the first locking surface and locks with each other. During disassembly, the first protrusion 23 is pushed into the milling cutter carrier 2 so that the first locking surface and the second locking surface 231 disengage and the milling cutter carrier 2 is pulled out, realizing disassembly and replacement. The milling cutter 3 typically includes a milling cutter body 31 and a milling cutter holder 32, with the milling cutter holder 32 usually located inside the milling cutter carrier 2.

[0035] The box body 1 is provided with a mounting slot 11 in the middle; a milling cutter fixing plate 12 is provided at the bottom of the mounting slot 11; the milling cutter fixing plate 12 is provided at the bottom of the mounting slot 11, and a plurality of milling cutter mounting rings 122 are arranged in an array on the milling cutter fixing plate 12, and a first snap-fit ​​surface is provided at the bottom of the milling cutter mounting rings 122; a milling cutter carrier 2 is provided on the milling cutter mounting rings 122, and a milling cutter positioning slot 21 is provided inside the milling cutter carrier 2; a first elastic snap-fit ​​part 22 is provided at the first end 211 of the milling cutter positioning slot 21; a first protrusion 23 is provided at the end of the first elastic snap-fit ​​part 22; and a second snap-fit ​​surface 231 is provided at the first protrusion 23; and a milling cutter 3, including a milling cutter body 31 and a milling cutter seat 32, the milling cutter seat 32 being provided inside the milling cutter positioning slot 21; wherein, the first snap-fit ​​surface and the second snap-fit ​​surface 231 are mutually limited, and the first snap-fit ​​surface and the second snap-fit ​​surface 231 are separated from each other by the first elastic snap-fit ​​part 22. By setting up a detachable milling cutter carrier 2, when part of the milling cutter carrier 2 is damaged or needs cleaning, it can be disassembled for replacement and cleaning, thereby avoiding the increase in production costs caused by replacing the whole unit.

[0036] Example 2: like Figures 2-7 As shown, this embodiment further explains and optimizes the structure proposed in Embodiment 1: In some embodiments, the milling cutter carrier 2 is an elastic structure, and the cross-section of the milling cutter positioning groove 21 is trapezoidal; the milling cutter positioning groove 21 has a second end 212 relative to the first end 211; the cross-sectional width of the first end 211 is smaller than the cross-sectional width of the second end 212. Specifically, the elastic structure of the milling cutter carrier 2 can be made of plastic, and the cross-section of the milling cutter positioning groove 21 is trapezoidal, so that when the milling cutter 3 is installed in the milling cutter positioning groove 21, the milling cutter 3 extends from the larger second end 212 and is gradually pressed by the side wall of the milling cutter positioning groove 21. The closer to the bottom, the greater the pressure received by the milling cutter 3, and the better the clamping effect, thereby better fixing the milling cutter 3 in the milling cutter positioning groove 21, thus achieving a tight fixation effect and preventing the milling cutter 3 from falling out of the milling cutter positioning groove 21 during transportation. The elastic structure enables the milling cutter holder 32 to be snapped in place, and the milling cutter 3 is stably snapped in place to prevent the milling cutter 3 from falling out of the milling cutter positioning groove 21. Furthermore, the cross-section of the milling cutter placement groove 21 is trapezoidal, which allows for the placement of milling cutters 3 of different specifications and sizes.

[0037] In some preferred embodiments, the cutter holder 32 is cylindrical, and the diameter of its bottom surface is larger than the inner diameter of the cutter positioning groove 21. Specifically, by having a bottom surface diameter larger than the inner diameter of the cutter positioning groove 21, when the cutter holder 32 is inserted into the cutter positioning groove 21, the side wall of the cutter carrier 2 can press against the cutter holder 32, achieving a secure fit of the cutter 3 within the cutter positioning groove 21, thereby preventing the cutter 3 from detaching from the cutter positioning groove 21 during transportation. The larger bottom surface diameter of the cutter holder 32 also allows for elastic locking of the cutter 3.

[0038] In other embodiments, a second protrusion is provided on the outer side of the cutter holder 32, and a third protrusion 321 is provided in the cutter positioning groove 21. An installation gap is provided between the third protrusions 321 so that the second protrusion extends below the third protrusion 321 through the installation gap. The second protrusion (not shown in the figure) and the third protrusion 321 are mutually restrained by rotating the cutter holder 32. Specifically, the second protrusion on the outer side of the cutter holder 32 is not annular, but typically a small portion. Similarly, the third protrusion 321 in the cutter positioning groove 21 is also not annular, but has an installation gap between them. This allows the cutter 3 to be inserted through the installation gap when the cutter holder 32 is placed in the cutter positioning groove 21, with the second protrusion positioned below the third protrusion 321. Rotation causes the second and third protrusions 321 to engage with each other. When removing the cutter 3, the knob needs to be turned in the opposite direction to disengage it from the installation gap. This method allows the milling cutter carrier 2 to avoid being manufactured with a trapezoidal cross-section as described above. The stability between the milling cutter 3 and the milling cutter positioning slot 21 can be achieved simply through interlocking between the structures. However, with this method, removing and installing the milling cutter 3 into the milling cutter positioning slot 21 requires the addition of a knob or a specific step. The second and third protrusions 321 achieve mutual interlocking between the milling cutter 3 and the milling cutter positioning slot 21, preventing the milling cutter 3 from easily detaching from the slot during transportation.

[0039] In some preferred embodiments, the milling cutter fixing plate 12 and the box body 1 are integrally formed. This integral formation makes injection molding of the box body 1 more convenient, eliminating the need for injection molding of multiple parts.

[0040] In other embodiments, at least one second elastic snap-fit ​​portion 14 is provided at the bottom of the mounting slot 11, and the milling cutter fixing plate 12 is provided with a fifth protrusion 121, so that the second elastic snap-fit ​​portion 14 snaps into the fifth protrusion 121. Specifically, the second elastic snap-fit ​​portion 14 can be a snap-fit ​​structure, and the fifth protrusion 121 is used to achieve structural fixation of the snap-fit ​​and the protrusion. In this way, since the milling cutter fixing plate 12 contains milling cutter mounting rings 122, the milling cutter fixing plate 12 can be slightly deformed to snap into the bottom of the mounting slot 11. This method allows the milling cutter fixing plate 12 to be replaced, in some extreme cases, to replace the broken milling cutter fixing plate 12. The second elastic snap-fit ​​portion 14 of the mounting slot 11 and the fifth protrusion 121 of the milling cutter fixing plate 12 enable the milling cutter fixing plate 12 and the mounting slot 11 to be detachable and fixed.

[0041] In some embodiments, a push groove 15 is provided on the first side 16 of the box body 1, and a push rod 151 is provided within the push groove 15. Specifically, the push groove 15 can be a rectangular groove structure with the push rod 151 in the middle. The push rod 151 can be integrally formed within the push groove 15 or it can be detachable. The push rod 151 can be replaced with a handle-like structure to facilitate pushing and pulling when the box body 1 is pushed or replaced on other devices. The push groove 15 and the internal push rod 151 facilitate the pushing and putting of the box.

[0042] In some embodiments, the second side 17 of the box body 1 is provided with a fixing groove 18, and a thread is provided in the fixing groove 18 to fix the box body 1 by means of the thread. Specifically, the second side 17 is the opposite side of the first side 16. The fixing groove 18 and the thread on the second side 17 enable the box body 1 to be fixed to external equipment by screws, so as to facilitate transportation, equipment replacement and other processes. The fixing groove 18 and the thread in the fixing groove 18 are used to fix the box to the outside.

[0043] In some embodiments, positioning points 19 are provided on the upper surface of the box body 1. Specifically, the positioning points 19 assist the external milling plate device in positioning the box body when picking up and placing the milling cutter 3. The positioning points 19 can be set on the box body 1 or on the milling cutter fixing plate 12. When on the milling cutter fixing plate 12, they can be set between the milling cutter mounting rings 122, or more specifically on the connection between the milling cutter mounting rings 122. The positioning points 19 enable the device to visually position the box body 1 when changing the milling cutter 3.

[0044] Example 3: This utility model also proposes a circuit board routing device, including a milling cutter 3 cutter head device as in any one of Embodiment 1 and Embodiment 2, and a routing device; the routing device is provided with a replacement groove, the milling cutter 3 cutter head device is disposed in the replacement groove, and the milling cutter 3 is attracted by the routing device to form the routing device.

[0045] Specifically, multiple milling cutter 3 cutter heads are arranged within replacement slots on the milling plate device. They can be further fixed to one side of the replacement slot via fixing slots 18 on the housing 1 of the milling plate device. The milling cutter 3 cutter heads can be pushed out or installed via the push rod of the pushing slot 15 from the other side of the replacement slot, facilitating manual replacement and placement. The milling plate device is equipped with a rotating head, which can move to mill the plate and also move above the milling cutter 3 cutter heads for replacement.

[0046] Furthermore, in practical use, milling cutters 3 of different diameters can be set on the milling cutter mounting ring 122 of the milling cutter 3 cutter head device according to the different sizes of the circuit boards produced, so as to realize the replacement of milling cutter 3 size without stopping the machine.

[0047] The serial numbers of the utility model embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this utility model.

Claims

1. A milling cutter head device, characterized in that, include: The box body (1) has a mounting slot (11) in the middle; a milling cutter fixing plate (12) is provided at the bottom of the mounting slot (11); the milling cutter fixing plate (12) is provided at the bottom of the mounting slot (11), and a plurality of milling cutter mounting rings (122) are arranged in an array on the milling cutter fixing plate (12), and a first snap-fit ​​surface is provided at the bottom of the milling cutter mounting rings (122); A milling cutter carrier (2) is mounted on the milling cutter mounting ring (122). The milling cutter carrier (2) has a milling cutter positioning groove (21). A first elastic locking portion (22) is provided at the first end (211) of the milling cutter positioning groove (21). A first protrusion (23) is provided at the end of the first elastic locking portion (22). A second locking surface (231) is provided on the first protrusion (23). The milling cutter (3) includes a milling cutter body (31) and a milling cutter holder (32), wherein the milling cutter holder (32) is disposed in the milling cutter positioning groove (21); The first snap-fit ​​surface and the second snap-fit ​​surface (231) are mutually limited, and the first snap-fit ​​surface and the second snap-fit ​​surface (231) are separated from each other by the first elastic snap-fit ​​part (22).

2. The milling cutter head device according to claim 1, characterized in that, The milling cutter carrier (2) is an elastic structure, and the cross-section of the milling cutter positioning groove (21) is trapezoidal; the milling cutter positioning groove (21) is the second end (212) relative to the first end (211); the cross-sectional width of the first end (211) is smaller than the cross-sectional width of the second end (212).

3. The milling cutter head device according to claim 2, characterized in that, The milling cutter holder (32) is a cylinder, and the bottom diameter of the milling cutter holder (32) is larger than the inner diameter of the milling cutter positioning groove (21).

4. The milling cutter head device according to claim 1, characterized in that, The milling cutter holder (32) has a second protrusion on its outer side and a third protrusion (321) in the milling cutter positioning groove (21). There is an installation gap between the third protrusions (321) so that the second protrusion extends below the third protrusion (321) through the installation gap. By rotating the milling cutter holder (32), the second protrusion and the third protrusion (321) are mutually limited.

5. The milling cutter head device according to claim 1, characterized in that, The milling cutter fixing plate (12) and the box body (1) are integrally set.

6. The milling cutter head device according to claim 1, characterized in that, The bottom of the mounting slot (11) is provided with at least one second elastic snap-fit ​​part (14), and the milling cutter fixing plate (12) is provided with a fifth protrusion (121) so that the second elastic snap-fit ​​part (14) snaps into the fifth protrusion (121).

7. The milling cutter head device according to claim 1, characterized in that, The first side (16) of the box body (1) is provided with a push groove (15), and a push rod (151) is provided in the push groove (15).

8. The milling cutter head device according to claim 1, characterized in that, The second side (17) of the box body (1) is provided with a fixing groove (18), and the fixing groove (18) is provided with a thread to fix the box body (1) by the thread.

9. The milling cutter head device according to claim 1, characterized in that, The upper surface of the box body (1) is provided with positioning points (19).

10. A circuit board routing device, characterized in that, Includes a milling cutter head device as described in any one of claims 1-9, and a milling plate device; the milling plate device is provided with a replacement groove, the milling cutter head device is disposed in the replacement groove, and the milling cutter (3) is attracted by the milling plate device to form the milling plate.

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