A milling cutter coating spraying device

Abstract

This invention relates to the field of spraying equipment technology, specifically to a milling cutter coating spraying device, comprising: a base; a processing table rotatably mounted on the upper side of the base; several clamps evenly arranged circumferentially on the processing table; and a spraying mechanism located on one side of the upper end of the base and corresponding to the movement trajectory of the clamps, the spraying mechanism being capable of circumferentially spraying the shank side of the milling cutter; through the rotational cooperation between the spraying mechanism and the processing table, continuous spraying processing of the milling cutter can be maintained, improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, and more specifically to a milling cutter coating spraying device. Background Technology

[0002] During the production, transportation, and subsequent use of end mills, in order to protect the non-alloy parts of the tool holder from rust due to corrosion, humid environments, etc., rust-proof spraying is often applied to this part. Specifically, the exposed part of the end mill after clamping is sprayed with rust-proof coating.

[0003] Currently, most conventional spraying methods use a fixed-point feeding and spraying approach. This involves placing the milling cutter at a fixed point using a clamping device, then spraying it. After completion, the cutter is unloaded, and the process is repeated for the next step. This results in low continuity of processing, and the spraying points are mostly set in opposite directions, making it impossible to spray the side of the milling cutter shank in a circumferential manner. The simple opposite setting also increases the risk of clogging of the opposite spray nozzles, which is not conducive to the need for stable production. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention proposes a milling cutter coating spraying device to solve the technical problems of low processing efficiency and low quality in the existing technology.

[0005] The technical solution adopted in this invention is a milling cutter coating spraying device, comprising: Base; A processing table, which is rotatably mounted on the upper side of the base; A clamping device, wherein the number of clamping devices is several and they are evenly arranged circumferentially on the processing table; A spraying mechanism is located on one side of the upper end of the base and corresponds to the movement trajectory of several clamps. The spraying mechanism can perform circumferential spraying on the shank side of the milling cutter.

[0006] This structure, through the cyclical operation of the processing table, switches the position of the clamp, allowing the clamp to intermittently correspond to the spraying mechanism, thereby enabling continuous loading, unloading, and spraying processes, resulting in higher efficiency.

[0007] The spraying mechanism includes: a bracket, a motor, a circumferential transmission assembly, and a spraying sleeve. The bracket is fixedly mounted on the upper end of the base. The motor and the circumferential transmission assembly are both mounted on the bracket and are connected to each other for transmission. The spraying sleeve is connected to the circumferential transmission assembly and corresponds to the movement trajectory of the clamp. The circumferential transmission assembly can drive the spraying sleeve to rotate circumferentially when the spraying sleeve is coaxial with the milling cutter.

[0008] This structure allows the motor to drive the circumferential transmission assembly, which in turn drives the spraying sleeve, enabling the spraying sleeve to rotate circumferentially around the milling cutter to achieve a comprehensive spraying effect.

[0009] The circumferential transmission assembly includes: a main drive gear, an idler gear, and an open gear. The main drive gear is concentrically connected to the rotating shaft of the motor. The idler gear and the open gear are rotatably mounted on the support via a rotating shaft. There are at least two idler gears, and each idler gear is respectively meshed between the main drive gear and the open gear. Any two idler gears are separated from each other and do not mesh. The diameter, number of teeth, and module of several of the idler wheels are the same.

[0010] The opening interval of the open gear is smaller than the interval distance between two adjacent idler gears.

[0011] The shaft connecting the open gear to the bracket and the spraying sleeve both have windows corresponding to the opening of the open gear. The spraying sleeve is equipped with nozzles that are offset from the windows. The bracket is equipped with a liquid injection pipe that is concentric with the spraying sleeve and rotatably and sealed to the shaft of the open gear. The nozzle is connected to the liquid injection pipe via a conduit.

[0012] This structure allows the open gear, the spray sleeve, and the corresponding open gear shaft to work with the machining table to transmit the milling cutter, enabling the milling cutter to automatically and accurately enter the spray sleeve. The spray sleeve then sprays the shank of the milling cutter, achieving a highly automated and efficient spraying effect. It also separates the shank and the cutting edge of the milling cutter to prevent the sprayed coating from covering the cutting edge.

[0013] The machining table has several mounting cavities, and several clamps are respectively disposed in the corresponding mounting cavities. Each clamp includes a movable part, a top plate, an expansion bladder, and an air injection component. There are several movable parts, which are evenly distributed circumferentially in the mounting cavities. The movable parts are used to clamp the shank of the milling cutter. The top plate is disposed in the mounting cavity and located below the movable parts. The expansion bladder is disposed below the top plate and can expand after being connected to the air injection component.

[0014] This structure allows the shank of the milling cutter to be directly inserted into the mounting cavity, and the moving parts and expansion bladder form a stable clamping for the milling cutter, which is beneficial for the stability required during machining.

[0015] The movable component is a spring sheet that converges from top to bottom towards the center of the mounting cavity.

[0016] This structure can stably accommodate the loading and unloading of milling cutters, and it is simple and stable.

[0017] The air injection component includes: an air distribution ring, an air inlet pipe, a sealing ring, and an isolation ring. The air distribution ring is located on the lower side of the workbench and corresponds to the positions of several mounting cavities. The inner bottom wall of the several mounting cavities has an air passage connecting the air distribution ring and the expansion bladder. The air inlet pipe is fixedly connected to the base through a connecting bracket and extends into the air distribution ring to form an air passage connection. The air distribution ring has an annular groove that matches the air inlet pipe. The sealing ring is connected to the air inlet pipe and forms a closed shield for the annular groove, so that the air distribution ring forms a closed space. The isolation ring is located between the sealing ring and the workbench. The isolation ring includes a first section and a second section. When the clamp corresponds to the first segment, the expansion bladder of the clamp is connected to the outside through the air passage but not to the air distribution ring; When the clamp corresponds to the second segment, the expansion bladder of the clamp is connected to the air distribution ring through the air passage but is not connected to the outside world.

[0018] This structure allows for synchronous rotation of the machining table, enabling the expansion bladder to exhibit different working conditions in the first or second segment of the corresponding isolation ring, thus meeting the clamping requirements of the milling cutter in both the loading / unloading area and the machining area.

[0019] The spraying mechanism also includes a lifting adjustment group, which is located between the bracket and the base and can adjust the horizontal height of the spraying sleeve.

[0020] The lifting and adjusting assembly includes: a stand, an electrically controlled telescopic device, an elastic element, and a base plate. The spraying sleeve is a foldable corrugated cylinder. The base plate is located at the lower end of the spraying sleeve and also has a window. The elastic element is located between the open gear and the base plate and keeps pushing the base plate away from the open gear in a static state. The electrically controlled telescopic device is located on the upper end of the base through the stand and its telescopic shaft is connected to the bracket. The electrically controlled telescopic device can adjust the horizontal height of the bracket by extending and retracting the telescopic shaft.

[0021] This structure allows for better matching of milling cutter processing needs of different sizes and models, and enables flexible adjustment of the spraying area of ​​the spraying sleeve, improving processing flexibility and accuracy.

[0022] As can be seen from the above technical solution, the beneficial technical effects of the present invention are as follows: 1. By coordinating the spraying mechanism with the rotation of the processing table, continuous spraying of the milling cutter can be maintained, thereby improving production efficiency.

[0023] 2. The opening of the open gear and the window on the spray sleeve and the corresponding open gear shaft can further cooperate with the machining table to feed the milling cutter, so that the milling cutter can be directly aligned with the middle of the spray sleeve without additional adjustment or control components. This further improves efficiency and is more conducive to the spraying process of the milling cutter.

[0024] 3. The lifting adjustment component can further match the spraying process of milling cutters of different lengths, making the equipment more adaptable and better meeting the processing needs of different products. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the overall structure of a milling cutter coating spraying device according to a first embodiment of the present invention; Figure 2 This is a structural cross-sectional view of a first embodiment of a milling cutter coating spraying device according to the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the structure of a milling cutter coating spraying device according to Embodiment 1 of the present invention after being rotated 90°; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the air injection component of a milling cutter coating spraying device according to the present invention; Figure 7 This is a schematic diagram of the spraying mechanism of a milling cutter coating spraying device according to the present invention; Figure 8 This is a schematic diagram of the structure of the open gear in the circumferential transmission group of the milling cutter coating spraying device of the present invention after rotation; Figure 9 This is a schematic diagram of a second embodiment of the milling cutter coating spraying device of the present invention; Figure label: Base 1; 2. Machining table; 21. Mounting cavity; Clamp 3, movable part 31, top plate 32, expansion bladder 33, air injection part 34, air distribution ring 341, air inlet pipe 342, sealing ring 343, isolation ring 344, first section 3441, second section 3442, ring groove 345; Spraying mechanism 4, bracket 41, motor 42, circumferential transmission group 43, main transmission gear 431, idler gear 432, open gear 433, window 434, spraying sleeve 44, nozzle 441, liquid injection pipe 442; 5. Lifting and adjusting assembly, 51. Upright frame, 52. Electrically controlled telescopic device, 53. Elastic component, 54. Base plate. Detailed Implementation

[0027] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0028] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0029] Example 1: like Figure 1-8 As shown, this embodiment provides a milling cutter coating spraying device, including: Base 1; The processing table 2 is rotatably mounted on the upper side of the base 1, and the rotation of the processing table 2 is driven by an external motor. Clamping device 3, there are several clamping devices 3 and they are evenly arranged circumferentially on the processing table 2; The spraying mechanism 4 is located on one side of the upper end of the base 1 and corresponds to the movement trajectory of several clamps 3. The spraying mechanism 4 can perform circumferential spraying on the shank side of the milling cutter.

[0030] The working principle of Example 1 is explained in detail below: Before spraying the milling cutter, the loading / unloading area and the processing area of ​​the device are set. The area corresponding to the spraying mechanism 4 is the processing area, and the front side of the base 1 is the loading / unloading area. The loading / unloading can be done by an automatic loading / unloading device such as a mechanical gripper or a feeder. The clamp 3 is used to clamp the shank side of the milling cutter.

[0031] When the milling cutter is being spray-coated, the processing table 2 is driven by an external drive device such as a motor and rotates intermittently to adjust the position of the clamp 3 in the loading / unloading area and the processing area, so as to achieve an automatic and continuous processing state. That is, after loading, the next empty clamp 3 is switched to load. After the spray-coating of a single milling cutter is completed, the next milling cutter to be processed is switched. In fact, the drive control of the equipment can be automated by using devices such as control panels and computers. These are conventional and feasible technical means for those skilled in the art. Therefore, the parameters such as control circuit, logic and timing will not be described in detail here.

[0032] When the spraying mechanism 4 sprays the milling cutter, the milling cutter will rotate with the processing table 2 to correspond to the spraying mechanism 4. The spraying mechanism 4 rotates and sprays the shank of the milling cutter until it has been sprayed at least once. Then, the milling cutter moves away from the spraying mechanism 4 with the processing table 2. In fact, a drying chamber with the same movement trajectory as several clamps 3 can be set between the base 1 and the processing table 2. This allows the sprayed milling cutter to automatically enter the drying chamber for drying and curing, so that it can be directly unloaded without being transferred for drying.

[0033] This method allows the milling cutter to be coated in a more continuous and effective manner during the spraying process, better meeting the needs of efficient and high-quality production.

[0034] The spraying mechanism 4 includes: a bracket 41, a motor 42, a circumferential transmission group 43, and a spraying sleeve 44. The bracket 41 is fixedly mounted on the upper end of the base 1. The motor 42 and the circumferential transmission group 43 are both mounted on the bracket 41 and are connected to each other for transmission. The spraying sleeve 44 is connected to the circumferential transmission group 43 and corresponds to the movement trajectory of the clamp 3. The circumferential transmission group 43 can drive the spraying sleeve 44 to rotate circumferentially when the spraying sleeve 44 is coaxial with the milling cutter.

[0035] In this first embodiment, the bracket 41 is used to support the entire spraying mechanism 4 and make the spraying sleeve 44 correspond to the circumferential movement position of the clamp 3. The motor 42 is used to drive the circumferential transmission group 43 and drive the spraying sleeve 44 to rotate, so that the spraying sleeve 44 can rotate around the milling cutter, thereby achieving a comprehensive spraying effect on the side of the milling cutter.

[0036] The circumferential transmission assembly 43 includes: a main transmission gear 431, an idler gear 432, and an open gear 433. The main transmission gear 431 is concentrically connected to the rotating shaft of the motor 42. The idler gear 432 and the open gear 433 are rotatably mounted on the bracket 41 via a rotating shaft. There are at least two idler gears 432, and each idler gear 432 is respectively meshed between the main transmission gear 431 and the open gear 433. Any two idler gears 432 are separated from each other and do not mesh. Several idler gears 432 have the same diameter, number of teeth, and module.

[0037] The opening interval of the open gear 433 is smaller than the interval between two adjacent idler gears 432.

[0038] The shaft connecting the open gear 433 and the bracket 41, as well as the spray sleeve 44, both have windows 434 corresponding to the opening of the open gear 433. The spray sleeve 44 is provided with nozzles 441 that are misaligned with the windows 434. The bracket 41 is provided with a liquid injection pipe 442 that is concentric with the spray sleeve 44 and is rotatably and sealingly connected to the shaft of the open gear 433. The nozzles 441 are connected to the liquid injection pipe 442 via conduits.

[0039] In this first embodiment, the opening of the open gear 433 and the window 434 on the spray sleeve 44 and the corresponding rotating shaft enable the milling cutter to automatically rotate into the spray sleeve 44 along with the processing table 2 before spraying. No other additional operation is required to position the milling cutter in the middle of the spray sleeve 44. During the spraying process, the main drive gear 431, driven by the motor 42, can actively and synchronously drive the two idler gears 432 to rotate, thereby driving the open gear 433 to rotate. When the open gear 433 rotates, it will drive the spray sleeve 44 to rotate around the circumference of the milling cutter, and then spray the paint from the nozzle 441 through the injection pipe 442 to apply it to the surface of the milling cutter until the spraying is completed.

[0040] It is worth noting that, in this embodiment, before processing, the opening of the open gear 433, the corresponding rotating shaft, and the window 434 of the spray sleeve 44 all face the loading side. This allows the milling cutter to automatically enter the processing position before spraying. After the spraying is completed, the opening of the open gear 433, the corresponding rotating shaft, and the window 434 of the spray sleeve 44 will face the unloading side. This allows the milling cutter to leave the processing position. At the same time, when the milling cutter leaves the processing position, the open gear 433, the rotating shaft, and the spray sleeve 44 simultaneously reset to prepare for the spraying of the next milling cutter.

[0041] The injection pipe 442 is fixedly connected to the bracket 41 in a static state, while maintaining a rotating and sealed state with the rotating shaft. In this way, during the spraying process, the paint can be normally input into the conduit through the injection pipe 442 until it is sprayed out through the nozzle 441, and the conduit can rotate synchronously with the rotating shaft to ensure the stable connection and delivery of the liquid circuit and structural components.

[0042] To prevent paint from spraying out of the spray sleeve 44 during spraying, in addition to setting an overall protective cover on the base 1, a brush can also be set at the window 434 of the spray sleeve 44 to shield the window 434 of the spray sleeve 44 without hindering the entry of the milling cutter into the spray sleeve 44. In addition, sponge rings can be set on the upper and lower sides inside the spray sleeve 44 to absorb the dripping paint, prevent it from overflowing and avoid it from covering the cutting edge of the milling cutter. In this way, together with the window 434 of the shaft corresponding to the open gear 433, the cutting edge of the milling cutter can be independently protected, which is more conducive to the spraying needs of the milling cutter.

[0043] The machining table 2 has several mounting cavities 21, and several clamps 3 are respectively disposed in the corresponding mounting cavities 21. Each clamp 3 includes a movable part 31, a top plate 32, an expansion bladder 33, and an air injection component 34. There are several movable parts 31, which are evenly distributed circumferentially in the mounting cavities 21. The movable parts 31 are used to clamp the shank of the milling cutter. The top plate 32 is disposed in the mounting cavity 21 and located below the movable parts 31. The expansion bladder 33 is disposed below the top plate 32 and can expand after being connected to the air injection component 34.

[0044] In this first embodiment, when clamping the milling cutter, the shank of the milling cutter can be directly aligned with the movable part 31 and inserted into the mounting cavity 21. The movable part 31 itself will move away from the milling cutter after being squeezed until the milling cutter is fully inserted into the mounting cavity 21. At this time, the movable part 31 forms an initial clamping and centering of the milling cutter through its own clamping force. As the machining table 2 moves until the expansion bladder 33 corresponds to the air injection part 34, the air injection part 34 introduces air into the expansion bladder 33 and causes it to expand until the expansion bladder 33 clamps the shank of the milling cutter. This forms a stable clamping state to meet the machining requirements. The top plate 32 plays a role in guiding and restricting the expansion direction of the expansion bladder 33 in coordination with the movable part 31. In other embodiments, automatic clamping devices such as pneumatic clamps can also be used directly.

[0045] The movable part 31 is a spring piece that converges from top to bottom towards the middle of the mounting cavity 21.

[0046] In this first embodiment, the spring sheet structure is simple. After being pushed by the shank of the milling cutter, it will flip downwards. When multiple spring sheets flip simultaneously, the opening in the middle will gradually expand until the shank can be inserted into the opening. In this way, the spring sheet can form a preliminary clamping and centering of the milling cutter through its own flipping elasticity. In other embodiments, a structure of inclined sliding sheet combined with spring can also be used, so that the sliding sheet can slide and expand the opening when it is squeezed to clamp the milling cutter.

[0047] The air injection component 34 includes: an air distribution ring 341, an air inlet pipe 342, a sealing ring 343, and an isolation ring 344. The air distribution ring 341 is located on the lower side of the workbench and corresponds to the positions of several mounting cavities 21. The inner bottom wall of the several mounting cavities 21 has an air passage that connects the air distribution ring 341 and the expansion bladder 33. The air inlet pipe 342 is fixedly connected to the base 1 through a connecting bracket and extends into the air distribution ring 341 to form an air passage connection. The air distribution ring 341 has an annular groove 345 that matches the air inlet pipe 342. The sealing ring 343 is connected to the air inlet pipe 342 and forms a closed shield on the annular groove 345, so that the air distribution ring 341 forms a closed space. The isolation ring 344 is located between the sealing ring 343 and the workbench. The isolation ring 344 includes a first section 3441 and a second section 3442. When the clamp 3 corresponds to the first segment 3441, the expansion bladder 33 of the clamp 3 is connected to the outside through the air passage but not to the air distribution ring 341. When the clamp 3 corresponds to the second segment 3442, the expansion bladder 33 of the clamp 3 is connected to the air distribution ring 341 through the air passage and is not connected to the outside.

[0048] In this first embodiment, the air distribution ring 341, together with the sealing ring 343 and the air inlet pipe 342, can provide air to the gripper 3 in all directions during the rotation of the processing table 2. That is, no matter where the gripper 3 moves under the drive of the processing table 2, it can supply air to the expansion bladder 33. Furthermore, to meet the clamping state requirements of the clamper 3 at different positions in the loading / unloading area and the machining area, the isolation ring 344 can segmentally connect or switch the air path of the expansion bladder 33. Specifically, the first segment 3441 of the isolation ring 344 can connect the air path of the expansion bladder 33 only to the outside world. At this time, it is located in the loading / unloading area, which can release the clamping of the expansion bladder 33 on the milling cutter, thereby performing loading or unloading operations. The second segment 3442 of the isolation ring 344 can connect the air path of the expansion bladder 33 only to the air distribution ring 341. At this time, it is located in the machining area, which can maintain the expansion clamping state of the expansion bladder 33, thereby ensuring the stability of the milling cutter during the machining process.

[0049] The first segment 3441 is located inside the air distribution ring 341 and is fixedly connected to the closing ring 343 so as to always correspond to the loading and unloading area position on the base 1. The second segment 3442 is located outside the air distribution ring 341 and is fixedly connected to the base 1 so as to always correspond to the processing area position on the base 1.

[0050] Example 2: like Figure 8 As shown, the only difference in technical features compared to Embodiment 1 is that the spraying mechanism 4 also includes a lifting adjustment group 5, which is located between the bracket 41 and the base 1 and can adjust the horizontal height of the spraying sleeve 44.

[0051] The lifting and adjusting assembly 5 includes: a stand 51, an electrically controlled telescopic device 52, an elastic element 53, and a base plate 54. The spraying sleeve 44 is a foldable corrugated cylinder. The base plate 54 is located at the lower end of the spraying sleeve 44 and also has a window 434. The elastic element 53 is located between the open gear 433 and the base plate 54 and keeps pushing the base plate 54 away from the open gear 433 in a static state. The electrically controlled telescopic device 52 is located on the upper end of the base 1 through the stand 51 and its telescopic shaft is connected to the bracket 41. The electrically controlled telescopic device 52 can adjust the horizontal height of the bracket 41 by telescopically extending and retracting the telescopic shaft.

[0052] Apart from that, all other structures are identical.

[0053] In this embodiment, in order to meet the processing needs of milling cutters of different lengths, the height of the support 41 can be adjusted by the electrically controlled telescopic device 52. The electrically controlled telescopic device 52 can be an electrically controlled telescopic rod or a hydraulic cylinder. Driven by the telescopic shaft of the electrically controlled telescopic device 52, the support 41 rises and falls, and the elastic element 53 is compressed or reduced, so that the base plate 54 can cooperate with the elastic element 53 to form a traction on the spraying sleeve 44, so that the spraying sleeve 44 folds or extends itself, thus adapting to the length of the milling cutter and meeting the spraying needs.

[0054] In this embodiment, the specific elastic element 53 is an elastic telescopic rod, that is, a spring is provided in the two sleeves that are nested together. The spring force pushes the two sleeves to keep them in an extended state. This can not only meet the telescopic requirements of the spraying sleeve 44, but also provide a certain anti-torsional support and improve stability. In other embodiments, structures such as spring sheets or springs can also be used for support.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A milling cutter coating spraying device, characterized in that, include: Base (1); The processing table (2) is rotatably mounted on the upper side of the base (1); Clamping device (3), the number of clamping devices (3) is several and they are evenly arranged circumferentially on the processing table (2); The spraying mechanism (4) is located on one side of the upper end of the base (1) and corresponds to the movement trajectory of several clamps (3). The spraying mechanism (4) can perform circumferential spraying on the shank side of the milling cutter.

2. The milling cutter coating spraying device according to claim 1, characterized in that, The spraying mechanism (4) includes: a bracket (41), a motor (42), a circumferential transmission group (43), and a spraying sleeve (44). The bracket (41) is fixedly mounted on the upper end of the base (1). The motor (42) and the circumferential transmission group (43) are both mounted on the bracket (41) and are connected to each other. The spraying sleeve (44) is connected to the circumferential transmission group (43) and corresponds to the movement trajectory of the clamp (3). The circumferential transmission group (43) can drive the spraying sleeve (44) to rotate circumferentially when the spraying sleeve (44) is coaxial with the milling cutter.

3. The milling cutter coating spraying device according to claim 2, characterized in that, The circumferential transmission assembly (43) includes: a main transmission gear (431), an idler gear (432), and an open gear (433). The main transmission gear (431) is concentrically connected to the rotating shaft of the motor (42). The idler gear (432) and the open gear (433) are rotatably mounted on the bracket (41) via a rotating shaft. The number of idler gears (432) is at least two, and each idler gear (432) is meshed between the main transmission gear (431) and the open gear (433). Any two idler gears (432) are separated from each other and do not mesh. The diameter, number of teeth, and module of several of the idler wheels (432) are the same.

4. A milling cutter coating spraying device according to claim 3, characterized in that, The opening interval of the open gear (433) is smaller than the interval between two adjacent idler gears (432).

5. A milling cutter coating spraying device according to claim 3, characterized in that, The shaft connecting the open gear (433) and the bracket (41) and the spray sleeve (44) are both opened with windows (434) corresponding to the opening of the open gear (433). The spray sleeve (44) is provided with nozzles (441) that are offset from the windows (434). The bracket (41) is provided with a liquid injection pipe (442) that is concentric with the spray sleeve (44) and rotatably and sealed to the shaft of the open gear (433). The nozzle (441) is connected to the liquid injection pipe (442) through a conduit.

6. A milling cutter coating spraying device according to claim 1, characterized in that, The processing table (2) has several mounting cavities (21), and several clamps (3) are respectively disposed in the corresponding mounting cavities (21). Each clamp (3) includes: a movable part (31), a top plate (32), an expansion bladder (33), and an air injection component (34). The number of movable parts (31) is several and they are evenly disposed in the mounting cavities (21) in a circumferential direction. The movable parts (31) are used to clamp the shank of the milling cutter. The top plate (32) is disposed in the mounting cavity (21) and located below the movable parts (31). The expansion bladder (33) is disposed below the top plate (32) and can expand after being connected to the air injection component (34).

7. A milling cutter coating spraying device according to claim 6, characterized in that, The movable part (31) is a spring piece that converges from top to bottom towards the middle of the mounting cavity (21).

8. A milling cutter coating spraying device according to claim 6, characterized in that, The air injection component (34) includes: an air distribution ring (341), an air inlet pipe (342), a sealing ring (343), and an isolation ring (344). The air distribution ring (341) is located on the lower side of the workbench and corresponds to the positions of several mounting cavities (21). The inner bottom wall of the several mounting cavities (21) has an air passage connecting the air distribution ring (341) and the expansion bladder (33). The air inlet pipe (342) is fixedly connected to the base (1) through a connecting bracket and extends into the air distribution ring (341). 41) An air passage is formed inside. The air distribution ring (341) has an annular groove (345) that matches the air intake pipe (342). The sealing ring (343) is connected to the air intake pipe (342) and forms a closed shield for the annular groove (345), so that the air distribution ring (341) forms a closed space. The isolation ring (344) is located between the sealing ring (343) and the worktable. The isolation ring (344) includes a first section (3441) and a second section (3442). When the clamp (3) corresponds to the first segment (3441), the expansion bladder (33) of the clamp (3) is connected to the outside through the air passage and is not connected to the air distribution ring (341); When the clamp (3) corresponds to the second segment (3442), the expansion bladder (33) of the clamp (3) is connected to the air distribution ring (341) through the air passage and is not connected to the outside.

9. A milling cutter coating spraying device according to claim 3, characterized in that, The spraying mechanism (4) also includes a lifting adjustment group (5), which is located between the bracket (41) and the base (1) and can adjust the horizontal height of the spraying sleeve (44).

10. A milling cutter coating spraying device according to claim 9, characterized in that, The lifting adjustment group (5) includes: a stand (51), an electric telescopic device (52), an elastic element (53), and a base plate (54). The spray sleeve (44) is a foldable corrugated cylinder. The base plate (54) is located at the lower end of the spray sleeve (44) and also has a window (434). The elastic element (53) is located between the open gear (433) and the base plate (54) and keeps pushing the base plate (54) away from the open gear (433) in a static state. The electric telescopic device (52) is located on the upper end of the base (1) through the stand (51) and its telescopic shaft is connected to the bracket (41). The electric telescopic device (52) can adjust the horizontal height of the bracket (41) by telescopically extending and retracting the telescopic shaft.

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