A mold surface milling device for a progressive cutting composite structure

Abstract

This invention relates to the field of milling technology, specifically to a milling machine for mold surfaces with a progressive cutting composite structure. The machine includes a bed mechanism comprising a spindle box and a spindle rotatably mounted at the bottom of the spindle box; and a milling cutter comprising a cutter body detachably mounted on the spindle. The cutter body has an internal flow channel and several circumferentially evenly distributed water outlet holes. By opening water outlet holes on the cutter body, when milling is performed using the outer peripheral cutting edge, the outer peripheral cutting edge generates frictional heat. At this time, a sealing component controls the connection between the internal flow channel and the branch flow channel. The milling fluid passes through the cutter body, the branch flow channel, and the water outlet channel, and is then sprayed out from one of the water outlet holes. The water outlet hole directly sprays the milling fluid upwards onto the outer cutting edge of the cutter body, improving the cooling effect on the outer cutting edge.

Description

Technical Field

[0001] This invention relates to the field of milling technology, specifically to a milling equipment for mold surfaces with a progressive cutting composite structure. Background Technology

[0002] Milling is a common machining method used in mold making, offering advantages such as dimensional accuracy and high efficiency. It typically employs progressive cutting, which means cutting through deep grooves / cavities in multiple layers, gradually working downwards. Each cut is a small segment of depth, reducing tool load and thus protecting the tool, reducing vibration, and ensuring greater dimensional accuracy.

[0003] When using end mills to machine molds, existing milling equipment requires spraying milling fluid onto the end mills to prevent them from overheating. Since the chip flutes of the end mills are spirally upward, the chips should normally run upward and outward along the flutes. However, the sprayed milling fluid will push the chips downward, in the opposite direction to chip removal, which will hinder chip discharge and easily lead to chip blockage and dulling, thus affecting the service life of the end mills. Summary of the Invention

[0004] To address the aforementioned problems, the present invention provides a milling machine for mold surfaces with a progressive cutting composite structure, comprising a bed mechanism, wherein the bed mechanism includes a spindle box and a spindle rotatably mounted at the bottom of the spindle box.

[0005] A milling cutter includes a milling cutter body detachably mounted on a spindle. The milling cutter body has an inner flow channel and several circumferentially evenly distributed water outlet holes. The milling cutter body also has a branch flow channel evenly distributed around the inner flow channel. The bottom end of each branch flow channel communicates with the bottom end of the inner flow channel. Each water outlet hole communicates with the branch flow channel via an upwardly angled water outlet channel located inside the milling cutter body. A sealing assembly for controlling the connection between the inner flow channel and the branch flow channel is installed between the branch flow channel and the inner flow channel.

[0006] When the outer peripheral cutting edge of the milling cutter body heats up, the sealing component controls the inner flow channel one to connect with the branch flow channel, and the water outlet one sprays milling fluid onto the outer peripheral cutting edge. When the outer peripheral cutting edge of the milling cutter body cools down, the sealing component controls the inner flow channel one to disconnect from the branch flow channel.

[0007] In one possible implementation, the sealing assembly includes a sealing sleeve that is slidably mounted inside the milling cutter body and located between the inner flow channel and the branch flow channel. A memory spring is fixedly connected between the bottom of the sealing sleeve and the inner wall of the milling cutter body, and the memory spring is in an extended state.

[0008] In one possible implementation, the water outlet is located in the chip groove of the milling cutter body, the water outlet is aligned with the outer peripheral cutting edge of the milling cutter body, the water outlet channel is arc-shaped and the direction of the arc curving upward is the same as the direction of the upward spiral of the chip groove, and the diameter of the water outlet channel gradually decreases from the inside to the outside.

[0009] In one possible implementation, the bottom of the milling cutter body is further provided with a second water outlet, the top of which is connected to the bottom of the inner flow channel through the inner hole of the sealing sleeve.

[0010] In one possible implementation, the outer ring wall of the milling cutter body is further provided with a chip-punching port located above the chip groove, and the interior of the milling cutter body is provided with an inner flow channel two symmetrically distributed about the inner flow channel one. The top end of the inner flow channel two is connected to the top end of the inner flow channel one, and the bottom end of the inner flow channel two is connected to the corresponding chip-punching port.

[0011] In one possible implementation, a chip removal mechanism is also included, comprising a chip removal ring chamber sleeved outside the spindle. Chip suction ports are provided on both the front and rear sides of the milling cutter body. The chip suction ports are connected to the chip removal ring chamber via a fixedly connected chip suction pipe. A filter assembly is installed inside the chip removal ring chamber. A chip discharge pipe is fixedly connected to the right side of the chip removal ring chamber. A negative pressure pipe is fixedly connected to the bottom of the chip removal ring chamber. A support frame is fixedly connected between the top of the chip removal ring chamber and the bottom of the spindle box.

[0012] In one possible implementation, the filter assembly includes a rotating sleeve rotatably mounted inside the chip removal ring chamber, the rotating sleeve being bolted to the main shaft, a filter cone being fixedly connected to the outer ring wall of the rotating sleeve, and the chip suction pipe and the negative pressure pipe communicating with the space inside the chip removal ring chamber and located on the upper and lower sides of the filter cone, respectively.

[0013] In one possible implementation, a baffle plate is fixedly connected to the inner ring wall of the chip removal ring chamber at the port of the chip discharge pipe. The side of the baffle plate near the central axis of the chip removal ring chamber is parallel to the inclined surface of the filter cone and a gap is reserved between them. The end of the chip discharge pipe away from the chip removal ring chamber gradually slopes downward.

[0014] In one possible implementation, a conveying assembly is also installed on the chip removal pipe. The conveying assembly includes rotating shafts rotatably mounted on the top of the chip removal pipe and distributed to the left and right. A drive belt is connected between the two rotating shafts. Several paddles are evenly installed on the drive belt in the circumferential direction. A bevel gear is fixedly connected to the front side of the left rotating shaft. A transmission box is fixedly installed on the support frame. A bevel gear ring is fixedly fitted on the main shaft. The input end of the transmission box is connected to the bevel gear ring, and the output end is connected to the bevel gear.

[0015] The beneficial effects of this invention are as follows: 1. By opening a water outlet hole on the cutter body, when milling is performed using the outer peripheral cutting edge of the cutter body, the outer peripheral cutting edge of the cutter body will generate heat due to friction. At this time, the sealing component controls the inner flow channel to connect with the branch flow channel. The milling fluid passes through the cutter body, the branch flow channel and the water outlet channel and is sprayed out from the water outlet hole. The water outlet hole directly sprays the milling fluid upward onto the outer cutting edge of the cutter body, improving the cooling effect of the outer cutting edge of the cutter body. When milling is performed using the bottom cutting edge of the cutter body, the temperature of the outer peripheral cutting edge of the cutter body is lower. At this time, the sealing component controls the inner flow channel to disconnect from the branch flow channel, and the water outlet hole does not spray the milling fluid outward, avoiding waste of the milling fluid. In addition, the upward sprayed milling fluid can push the chips in the chip groove upward, improving the chip removal effect during milling.

[0016] 2. This invention uses a chip suction port on the periphery of the milling cutter body to absorb chips under negative pressure. After the chips leave the chip groove of the milling cutter body, they are pushed outward by the milling fluid sprayed from the chip ejection port. At this time, the chip suction port absorbs the pushed-out chips, and the chips are sucked into the chip removal ring chamber along the chip suction pipe. The chip is filtered by the filter assembly to remove the milling fluid from the chips. The filtered chips are discharged outward from the chip discharge pipe, and the milling fluid is transported to the negative pressure suction system for recycling by the negative pressure pipe, which prevents the chips from falling back onto the mold and prevents the chips from being crushed or scraped on the mold steel by the cutting tool, resulting in scratches.

[0017] 3. This invention filters and clumps chips by setting a filter cone in the chip removal ring chamber, which can gather filamentous chips into clumps. The clumps have better rolling properties, making it easier for the chips to be discharged downwards. At the same time, the clumps are denser than filamentous chips, which can reduce the volume of the chips and facilitate their recycling. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the bed mechanism of the present invention;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the milling cutter body of the present invention;

[0021] Figure 4 This is a front sectional view of the milling cutter body of the present invention;

[0022] Figure 5 This is the present invention. Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 This is a partial cross-sectional view of the chip removal mechanism of the present invention;

[0024] Figure 7 This is a three-dimensional structural schematic diagram of the conveying component of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the baffle of the present invention.

[0026] In the diagram: 1. Bed mechanism; 11. Spindle box; 12. Spindle; 2. Milling cutter; 21. Milling cutter body; 22. Inner flow channel one; 23. Water outlet one; 231. Water outlet channel; 24. Diverter channel; 25. Separator assembly; 251. Separator sleeve; 252. Memory spring; 26. Water outlet two; 27. Chip flushing port; 28. Inner flow channel two; 3. Chip removal mechanism; 31. Chip removal ring chamber; 32. Chip suction port; 321. Chip suction pipe; 33. Filter assembly; 331. Rotating sleeve; 332. Filter cone; 34. Chip discharge pipe; 341. Baffle; 35. Conveying assembly; 351. Rotating shaft; 352. Drive belt; 353. Paddle; 354. Bevel gear; 355. Transmission box; 356. Bevel gear ring; 36. Negative pressure pipe; 37. Support frame. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Please see Figure 1 - Figure 8 A milling machine for mold surface with a progressive cutting composite structure includes a bed mechanism 1, which includes a spindle box 11 and a spindle 12 rotatably mounted at the bottom of the spindle box 11.

[0029] The milling cutter 2 includes a milling cutter body 21 detachably mounted on the spindle 12. The milling cutter body 21 has an inner flow channel 22 inside and a plurality of water outlet holes 23 evenly distributed around the circumference. The milling cutter body 21 also has a branch flow channel 24 evenly distributed around the inner flow channel 22 inside. The bottom end of the branch flow channel 24 is connected to the bottom end of the inner flow channel 22. The water outlet holes 23 are connected to the branch flow channel 24 through a water outlet flow channel 231 that is opened inside the milling cutter body 21 and is inclined upward. A sealing component 25 for controlling the opening and closing of the inner flow channel 22 and the branch flow channel 24 is installed between the branch flow channel 24 and the inner flow channel 22.

[0030] When the outer peripheral cutting edge of the milling cutter body 21 heats up, the sealing component 25 controls the inner flow channel 22 to connect with the branch flow channel 24, and the water outlet 23 sprays milling fluid onto the outer peripheral cutting edge. When the outer peripheral cutting edge of the milling cutter body 21 cools down, the sealing component 25 controls the inner flow channel 22 to disconnect from the branch flow channel 24.

[0031] In practical use, by opening a water outlet hole 23 on the cutter body 21, when only the bottom cutting edge of the cutter body 21 is used for milling, the temperature of the outer peripheral cutting edge of the cutter body 21 is relatively low. At this time, the sealing component 25 controls the inner flow channel 22 to disconnect from the branch channel 24, and the water outlet hole 23 does not spray milling fluid outward, thus avoiding waste of milling fluid. When the outer peripheral cutting edge of the cutter body 21 is used for milling, the outer peripheral cutting edge of the cutter body 21 will generate heat due to friction. At this time, the sealing component 25 controls the inner flow channel 22 to connect with the branch channel 24. The milling fluid passes through the cutter body 21, the branch channel 24 and the water outlet channel 231 and is sprayed out from the water outlet hole 23. The water outlet hole 23 sprays the milling fluid directly upward onto the outer cutting edge of the cutter body 21, improving the cooling effect of the outer cutting edge of the cutter body 21. At the same time, the upward sprayed milling fluid can push the chips in the chip groove upward, improving the chip removal effect of the cutter body 21 during milling.

[0032] Please see Figure 3 , Figure 4 and Figure 5 The sealing assembly 25 includes a sealing sleeve 251 that is slidably installed inside the milling cutter body 21 and located between the inner flow channel 22 and the branch channel 24. A memory spring 252 is fixedly connected between the bottom of the sealing sleeve 251 and the inner wall of the milling cutter body 21. The memory spring 252 is in an extended state at low temperature.

[0033] In practical use, when the temperature of the outer cutting edge of the milling cutter body 21 is low, the memory spring 252 is in an extended state. At this time, the memory spring 252 pushes the sealing sleeve 251 to move upward, so that the sealing sleeve 251 seals the bottom of the inner flow channel 22. The sealing sleeve 251 separates the inner flow channel 22 and the branch channel 24, preventing the milling fluid from entering the branch channel 24 from the inner flow channel 22. When the milling cutter body 21 is used for cutting with the outer cutting edge, as the temperature of the outer cutting edge of the milling cutter body 21 rises, the memory spring 252 returns to its original state at high temperature. The memory spring 252 drives the sealing sleeve 251 to move downward, so that the inner flow channel 22 and the branch channel 24 are connected. At this time, the milling fluid in the inner flow channel 22 enters the branch channel 24, and then is transported from the water outlet channel 231 to the water outlet hole 23 and sprayed out, so as to cool the outer cutting edge of the milling cutter body 21 in time and prevent the outer cutting edge of the milling cutter body 21 from being damaged due to excessive temperature.

[0034] Please see Figure 3 and Figure 4The water outlet 23 is located in the chip groove of the milling cutter body 21. The water outlet 23 is aligned with the outer peripheral cutting edge of the milling cutter body 21. The water outlet channel 231 is arc-shaped and the upward curvature of the arc is the same as the upward spiral direction of the chip groove. The diameter of the water outlet channel 231 gradually decreases from the inside to the outside.

[0035] In practical use, by designing the water outlet channel 231 as an arc and bending it along the spiral direction of the chip groove, the water jet from the water outlet hole 23 can be directed upwards along the spiral direction of the chip groove, which facilitates the cleaning of chips in the chip groove and prevents chips from accumulating in the chip groove. Since the diameter of the water outlet channel 231 gradually decreases from the inside to the outside, the water jet speed from the water outlet hole 23 is increased, which can improve the impact effect of the water flow and further improve the chip removal effect.

[0036] Please see Figure 4 and Figure 5 The bottom of the milling cutter body 21 is also provided with a water outlet hole 26, and the top of the water outlet hole 26 is connected to the bottom of the inner flow channel 22 through the inner hole of the sealing sleeve 251.

[0037] In practical use, during milling, the milling fluid in the inner channel 22 is sprayed downward from the outlet hole 26, which can cool the bottom edge of the milling cutter body 21. At the same time, the sprayed milling fluid can wash away the generated chips from the bottom, improving the chip removal effect.

[0038] Please see Figure 3 and Figure 4 The outer ring wall of the milling cutter body 21 is also provided with a chip-punching port 27 located above the chip groove. The interior of the milling cutter body 21 is provided with an inner flow channel 28 symmetrically distributed about the inner flow channel 1 22. The top end of the inner flow channel 28 is connected to the top end of the inner flow channel 1 22, and the bottom end of the inner flow channel 28 is connected to the corresponding chip-punching port 27.

[0039] In practical use, during the milling process, some of the milling fluid flows from the inner channel 28 to the chip ejection port 27 and is sprayed out in a fan shape. The sprayed milling fluid washes away the chips discharged from the top of the chip groove, making it easier to clean the chips in time and avoid the chips from accumulating near the milling tool 2.

[0040] When milling a mold, the generated chips enter the chip groove. The spiral chip groove acts like a propeller, pushing the chips upward and outward along the groove. However, the pushed-out chips fall back onto the mold. The chips are crushed and scraped on the mold steel by the cutting tool, which can easily cause scratches and other adverse effects.

[0041] Please see Figure 1 , Figure 2 and Figure 6The system also includes a chip removal mechanism 3, which comprises a chip removal ring chamber 31 fitted around the spindle 12. Chip suction ports 32 are provided on both the front and rear sides of the milling cutter body 21. The chip suction ports 32 and the chip removal ring chamber 31 are connected by a fixedly connected chip suction pipe 321. The chip suction ports 32 are at the same height as the chip discharge port 27. A filter assembly 33 is installed inside the chip removal ring chamber 31. A chip discharge pipe 34 is fixedly connected to the right side of the chip removal ring chamber 31. A negative pressure pipe 36 is fixedly connected to the bottom of the chip removal ring chamber 31. A support frame 37 is fixedly connected between the top of the chip removal ring chamber 31 and the bottom of the spindle box 11. It should be noted that the negative pressure pipe 36 is connected to an existing negative pressure suction system for recovering milling fluid.

[0042] In practical use, after the chips detach from the chip groove of the milling cutter body 21, they are pushed outward by the milling fluid sprayed from the chip ejection port 27. At this time, the chip suction port 32 absorbs the pushed-out chips, and the chips are sucked into the chip removal ring chamber 31 along the chip suction pipe 321. The chips are filtered by the filter assembly 33 to remove the milling fluid from the chips. The filtered chips are discharged outward from the chip discharge pipe 34, and the milling fluid is transported to the negative pressure suction system by the negative pressure pipe 36 for recycling, so as to prevent the chips from falling back onto the mold and prevent the chips from being crushed or scraped on the mold steel by the cutting tool, resulting in scratches.

[0043] Please see Figure 6 and Figure 7 The filter assembly 33 includes a rotating sleeve 331 rotatably mounted inside the chip removal ring chamber 31. The rotating sleeve 331 is fixedly mounted on the main shaft 12 by bolts. A filter cone 332 is fixedly connected to the outer ring wall of the rotating sleeve 331. The chip suction pipe 321 and the negative pressure pipe 36 are respectively connected to the space inside the chip removal ring chamber 31 and located on the upper and lower sides of the filter cone 332.

[0044] In practical use, when the main shaft 12 rotates, it drives the rotating sleeve 331 and the filter cone 332 to rotate together. The filtered chips fall onto the surface of the filter cone 332. Since the filter cone 332 is a ring-shaped structure that is wider at the bottom and narrower at the top, the chips will slide down the inclined surface of the filter cone 332 to the bottom. At this time, through the relative rotation between the filter cone 332 and the inner wall of the chip removal ring 31, the dispersed chips are gradually kneaded into a ball, which makes it easy to collect the chips.

[0045] Please see Figure 2 and Figure 8 A baffle 341 is fixedly connected to the inner ring wall of the chip removal ring 31 at the port of the chip discharge pipe 34. The side of the baffle 341 near the central axis of the chip removal ring 31 is parallel to the inclined surface of the filter cone 332 and a certain gap is reserved between them. The end of the chip discharge pipe 34 away from the chip removal ring 31 gradually slopes downward.

[0046] Please see Figure 2 and Figure 7The chip removal pipe 34 is also equipped with a conveying assembly 35. The conveying assembly 35 includes rotating shafts 351 that are rotatably mounted on the top of the chip removal pipe 34 and distributed on the left and right. The two rotating shafts 351 are connected by a transmission belt 352. Several paddles 353 are evenly installed on the circumferential direction of the transmission belt 352. A bevel gear 354 is fixedly connected to the front side of the left rotating shaft 351. A transmission box 355 is fixedly mounted on the support frame 37. A bevel gear ring 356 is fixedly mounted on the main shaft 12. The input end of the transmission box 355 is connected to the bevel gear ring 356 and the output end is connected to the bevel gear 354.

[0047] In practical use, since there is a certain gap between the baffle 341 and the inclined surface of the filter cone 332, when the chips are small, the chips can pass through the gap between the baffle 341 and the filter cone 332, so that the chips have enough space to be rolled into a ball on the surface of the filter cone 332. When the chips are larger, the baffle 341 blocks the chip ball, and the chip ball enters the chip discharge pipe 34 under the guidance of the baffle 341.

[0048] At the same time, the spindle 12 drives the rotating shaft 351 to rotate through the transmission function of the transmission box 355. The rotating shaft 351 drives the transmission belt 352 to rotate, which in turn drives the paddle 353 to rotate counterclockwise. The paddle 353 pushes the chip ball to roll to the right, giving the chip ball an initial velocity so that it can be discharged downward along the chip discharge pipe 34.

[0049] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A milling machine for mold surfaces with a progressive cutting composite structure, characterized in that: It includes a bed mechanism (1), which includes a spindle box (11) and a spindle (12) rotatably mounted at the bottom of the spindle box (11); The milling cutter (2) includes a milling cutter body (21) detachably mounted on a spindle (12). The milling cutter body (21) has an inner flow channel (22) inside. The milling cutter body (21) has a plurality of water outlet holes (23) evenly distributed around the circumference. The milling cutter body (21) has a branch channel (24) evenly distributed around the inner flow channel (22) inside. The bottom end of the branch channel (24) is connected to the bottom end of the inner flow channel (22). The water outlet hole (23) is connected to the branch channel (24) through a water outlet flow channel (231) opened inside the milling cutter body (21) and inclined upward. A sealing component (25) for controlling the opening and closing of the inner flow channel (22) and the branch channel (24) is installed between the branch channel (24) and the inner flow channel (22). When the outer peripheral cutting edge of the milling cutter body (21) heats up, the sealing component (25) controls the inner flow channel one (22) to connect with the branch flow channel (24), and the water outlet one (23) sprays milling fluid onto the outer peripheral cutting edge. When the outer peripheral cutting edge of the milling cutter body (21) cools down, the sealing component (25) controls the inner flow channel one (22) to disconnect from the branch flow channel (24). The first water outlet (23) is located in the chip groove of the milling cutter body (21). The first water outlet (23) is aligned with the outer peripheral cutting edge of the milling cutter body (21). The water outlet channel (231) is arc-shaped and the direction of the arc curving upward is the same as the direction of the chip groove spiraling upward. The diameter of the water outlet channel (231) gradually decreases from the inside to the outside. The sealing assembly (25) includes a sealing sleeve (251) that is slidably mounted inside the milling cutter body (21) and located between the inner flow channel (22) and the branch flow channel (24). A memory spring (252) is fixedly connected between the bottom of the sealing sleeve (251) and the inner wall of the milling cutter body (21). The memory spring (252) is in an extended state. The bottom of the milling cutter body (21) is also provided with a second water outlet (26), and the top of the second water outlet (26) is connected to the bottom of the inner flow channel (22) through the inner hole of the sealing sleeve (251). The outer ring wall of the milling cutter body (21) is also provided with a chip-punching port (27) located above the chip groove. The interior of the milling cutter body (21) is provided with an inner flow channel two (28) symmetrically distributed about the inner flow channel one (22). The top end of the inner flow channel two (28) is connected to the top end of the inner flow channel one (22), and the bottom end of the inner flow channel two (28) is connected to the corresponding chip-punching port (27).

2. The milling equipment for mold surface of a progressive cutting composite structure according to claim 1, characterized in that: It also includes a chip removal mechanism (3), which includes a chip removal ring chamber (31) sleeved on the outside of the spindle (12). The front and rear sides of the milling cutter body (21) are provided with chip suction ports (32). The chip suction ports (32) and the chip removal ring chamber (31) are connected by a chip suction pipe (321) that is fixedly connected. A filter assembly (33) is installed inside the chip removal ring chamber (31). A chip discharge pipe (34) is fixedly connected to the right side of the chip removal ring chamber (31). A negative pressure pipe (36) is fixedly connected to the bottom of the chip removal ring chamber (31). A support frame (37) is fixedly connected between the top of the chip removal ring chamber (31) and the bottom of the spindle box (11).

3. The milling equipment for mold surface of a progressive cutting composite structure according to claim 2, characterized in that: The filter assembly (33) includes a rotating sleeve (331) rotatably mounted inside the chip removal ring chamber (31). The rotating sleeve (331) is fixedly mounted on the main shaft (12) by bolts. A filter cone (332) is fixedly connected to the outer ring wall of the rotating sleeve (331). The chip suction pipe (321) and the negative pressure pipe (36) are respectively connected to the space inside the chip removal ring chamber (31) and located on the upper and lower sides of the filter cone (332).

4. The milling equipment for mold surface of a progressive cutting composite structure according to claim 3, characterized in that: A baffle (341) located at the port of the chip removal pipe (34) is fixedly connected to the inner ring wall of the chip removal ring (31). The side of the baffle (341) near the central axis of the chip removal ring (31) is parallel to the inclined surface of the filter cone (332) and a gap is reserved between them. The end of the chip removal pipe (34) away from the chip removal ring (31) gradually slopes downward.

5. The milling equipment for mold surface of a progressive cutting composite structure according to claim 4, characterized in that: The chip removal pipe (34) is also equipped with a conveying assembly (35). The conveying assembly (35) includes a rotating shaft (351) rotatably mounted on the top of the chip removal pipe (34) and distributed on the left and right. The two rotating shafts (351) are connected by a transmission belt (352). Several paddles (353) are evenly installed on the transmission belt (352) in the circumferential direction. A bevel gear (354) is fixedly connected to the front side of the rotating shaft (351) on the left. A transmission box (355) is fixedly mounted on the support frame (37). A bevel gear ring (356) is fixedly fitted on the main shaft (12). The input end of the transmission box (355) is connected to the bevel gear ring (356) and the output end is connected to the bevel gear (354).

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