A milling machine for a CNC machining center

Abstract

This invention discloses a milling machine tool for CNC machining centers, relating to the field of CNC machining centers. It includes a base, with a transverse slide mounted on one side of the top of the base. The execution end of the transverse slide is fixedly connected to a longitudinal slide. Cutting fluid is drawn into a receiving cylinder via a first delivery pipe and pre-sprayed onto the workpiece surface through a spray nozzle. This milling machine tool for CNC machining centers achieves multi-dimensional technological improvements by incorporating a follow-up cutting fluid spraying component and an integrated cleaning and chip removal structure. Firstly, the vertical cylinder extends and retracts by rollers adhering to the workpiece surface, forming a volumetric pump structure with dual one-way valves, extending tool life and improving the surface finish and dimensional accuracy of the machined workpiece. Secondly, the spraying component can adaptively extend and retract with the workpiece's outer diameter, reducing equipment modification costs. Thirdly, the lower spraying component is linked to the cleaning and chip removal mechanism, effectively preventing chip accumulation and scratching of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of CNC machining center technology, specifically a milling machine tool for CNC machining centers. Background Technology

[0002] CNC machining centers are widely used in the precision milling of molds and mechanical parts. They rely on the CNC system to control the linkage of each axis to complete the cutting of complex curved surfaces, grooves and contours. They are the core equipment of modern precision manufacturing. However, they are currently relatively cumbersome to operate.

[0003] To address the aforementioned issues, reference can be made to prior art 1 (Chinese Patent Application No. CN202211017636.8, filed August 23, 2022), which discloses a multi-functional inspection and milling machining center. This device adjusts the positions of the inspection device and the milling mechanism through a longitudinal translation mechanism and a transverse translation mechanism. The workpiece is inspected using the inspection device and a high-precision inspection fixture, and then milled by the milling mechanism, achieving integrated inspection and milling. This eliminates the need for post-inspection workpiece hoisting, saving time and improving efficiency. Alternatively, reference can be made to prior art 2 (Chinese Patent Application No. CN202110900016.8, filed August 6, 2021), which discloses a gantry milling machine for machining center magnetic poles. During operation, the central magnetic pole of the magnet is placed on the milling table, positioned between the top wall milling assembly and the bottom wall milling assembly. Then, the machine is started based on the position of the central magnetic pole on the top wall and the center magnetic pole of the magnet. The position of the bottom wall of the magnetic pole to be milled is then moved to the position of the side wall of the central magnetic pole to be milled. Then, the top wall of the central magnetic pole is milled by the top wall milling assembly, the bottom wall of the central magnetic pole is milled by the bottom wall milling assembly, and the side wall of the central magnetic pole is milled by the side wall milling assembly. This expands the milling range of the central magnetic pole of the magnet in the same time and improves milling efficiency. Finally, refer to the prior art 3 (Chinese patent application number CN202022842027.9, application date 2020.11.30) which discloses a special machining center for drilling and milling of oil pipelines. This device drives the screw to move left and right inside the stud by rotating the knob, which drives the slider to move effectively inside the slide groove, so that the motor moves. It can effectively move and mill according to the size of the pipeline. Rotating the knob drives the lead screw to move up and down, so that one clamping plate moves up and down. The electric push rod drives the other clamping plate to move telescopically, so as to fix the pipeline for milling and effectively improve the processing quality.

[0004] Although the above-mentioned device can improve the overall efficiency, it still has some shortcomings. For example, when machining cylindrical workpieces, the workpiece needs to be moved to machine different positions. However, there is a problem in this process: the cutting fluid does not have enough time to form a lubricating film on the cutting edge in advance, and the cutting edge is subjected to high temperature thermal shock instantly, which may cause damage to the cylindrical workpiece.

[0005] Therefore, we propose a milling machine tool for CNC machining centers to solve the problems mentioned in the background art. Summary of the Invention

[0006] The purpose of this invention is to provide a milling machine tool for CNC machining centers to solve the problem mentioned in the background art. When machining cylindrical workpieces, the workpiece needs to be moved to different positions, but there is a problem in this process: the cutting fluid does not have enough time to form a lubricating film on the cutting edge in advance, and the cutting edge is subjected to high temperature thermal shock instantly, which may cause damage to the cylindrical workpiece.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a milling machine tool for a CNC machining center, comprising a base, a transverse slide seat mounted on one side of the top of the base, the execution end of the transverse slide seat being fixedly connected to a longitudinal slide seat, the execution end of the longitudinal slide seat acting on the outside of the milling assembly; a fixed seat fixed to the side of the machining area of ​​the base, the fixed seat being provided with a drive unit and a cutting fluid follow-up spraying assembly; the cutting fluid follow-up spraying assembly comprising a receiving cylinder, a vertical cylinder, and a return spring; the receiving cylinder being rotatably mounted on the upper end of the fixed seat and being drivenly connected to the drive unit, the vertical cylinder being sealed and slidably inserted into the receiving cylinder, and the return spring being supported between the receiving cylinder and the vertical cylinder; a roller component for conforming to the workpiece surface being rotatably provided at the lower end of the vertical cylinder; the receiving cylinder being connected to a first delivery pipe with a second one-way valve, the vertical cylinder being provided with a water inlet with a first one-way valve and a liquid outlet with a spray nozzle, the cutting fluid being drawn into the receiving cylinder through the first delivery pipe and pre-sprayed onto the workpiece surface through the spray nozzle when the vertical cylinder extends and retracts with the roller component.

[0008] Preferably, the drive unit includes a drive motor, a rotating sleeve, a reciprocating threaded rod, and a moving rod; the drive motor is fixed inside the fixed base, the rotating sleeve is coaxially fixed to the output end of the drive motor, the reciprocating threaded rod is threadedly connected inside the rotating sleeve, and the moving rod is fixed to the outer end of the reciprocating threaded rod; the moving rod is hinged to the rotating rod, and the other end of the rotating rod is slidably engaged with the sliding sleeve on the outer side of the receiving cylinder.

[0009] Preferably, the roller assembly includes a roller body, a ratchet and pawl assembly, and several negative pressure discs; the roller body is rotatably mounted on the lower end of the vertical cylinder, the ratchet and pawl assembly is located between the roller body and the vertical cylinder, and is used to realize unidirectional rotation of the roller body; the negative pressure discs are arranged circumferentially on the outer side of the roller body.

[0010] Preferably, the water spray nozzles are divided into two groups: one group of water spray nozzles faces the negative pressure plate at the top of the roller body, and the other group of water spray nozzles is inclined towards the workpiece surface to be processed.

[0011] Preferably, the cutting fluid follow-up spraying assembly is provided in three sets, and the three sets of receiving cylinders are evenly arranged along the circumference of the fixed base.

[0012] Preferably, the two sets of cutting fluid follow-up spraying components located below are also connected to a cleaning and chip removal mechanism, which is configured to correspond to the discharge port of the base.

[0013] Preferably, the cleaning and chip removal mechanism includes a second conveying pipe, a lifting component, a water spraying component, and a guide plate; the second conveying pipe is connected to the side of the vertical cylinder, the lifting component is fixed to the top of the base, the water spraying component is installed on the top of the lifting component and connected to the second conveying pipe; the guide plate is inclinedly arranged below the processing area, and the lower end of the guide plate corresponds to the discharge port.

[0014] Preferably, the lifting component includes a fixed cylinder, a cooperating spring, and a top rod; the fixed cylinder is fixed to the base, the top rod is slidably inserted into the fixed cylinder, and the cooperating spring is supported between the bottom of the fixed cylinder and the top rod; the bottom of the top rod is provided with a pressure valve, and the top rod is hollow inside and communicates with the water spray component.

[0015] Preferably, the guide plate has a guide plate at one end near the drain outlet, and the end of the guide plate extends into the inside of the drain outlet.

[0016] Preferably, the milling assembly is a vertical spindle milling unit, and the transverse slide and the longitudinal slide respectively drive the milling assembly to achieve horizontal transverse and vertical longitudinal feed.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: This milling machine tool for CNC machining centers achieves multi-dimensional technological improvements by setting up a follow-up cutting fluid spraying component and an integrated cleaning and chip removal structure. Firstly, relying on the rollers to adhere to the workpiece surface and drive the vertical cylinder to extend and retract, combined with a double one-way valve to form a volumetric pump structure, a continuous lubrication and cooling film can be formed on the surface to be machined before the tool cuts into the workpiece, effectively avoiding instantaneous high-temperature thermal shock of the cutting edge, significantly reducing the risk of tool breakage, extending tool life, and improving the surface finish and dimensional accuracy of the workpiece. Secondly, the spraying component can adaptively extend and retract with the outer diameter of the workpiece, adapting to the machining of cylindrical workpieces of different diameters, reducing equipment modification costs. Thirdly, the lower spraying component is linked to the cleaning and chip removal mechanism, which reuses the cutting fluid pressure to flush the chips in the machining area, and discharges them through a guide structure, effectively preventing chip accumulation and scratching of the workpiece, as detailed below: 1. The rollers roll synchronously with the workpiece feed, driving the vertical cylinder to reciprocate within the receiving cylinder. Combined with two sets of one-way valves, this achieves quantitative intake and precise spraying of cutting fluid. The cutting fluid is evenly applied to the surface to be machined before the tool contacts the workpiece, establishing a complete lubrication and cooling barrier in advance. This design significantly reduces the thermal shock effect in the initial cutting stage, minimizing thermal fatigue damage to the tool edge and effectively extending tool life. Simultaneously, it avoids thermal deformation and surface burns on the workpiece surface caused by instantaneous high temperatures, ensuring stable milling dimensional accuracy and surface finish for cylindrical workpieces. It is particularly suitable for precision milling of thin-walled, low-rigidity cylindrical workpieces.

[0018] 2. Link the lower spraying component with the cleaning and chip removal mechanism. Use the residual pressure of spraying to drive the water spray component to flush the processing table. With the help of the inclined guide plate and the guide plate, the chips and waste liquid are concentrated and guided to the discharge port for discharge. This realizes the reuse of the cutting fluid supply and chip cleaning functions. It not only avoids chip accumulation and scratching the workpiece surface, but also reduces the setting of independent chip removal system, optimizes the overall layout of the machine tool, and improves the automation level of continuous operation and the cleanliness of the working environment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the main structure of the milling assembly of the present invention; Figure 4 This is a schematic diagram of the main structure of the fixing base of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the main cross-sectional structure of the container cylinder of the present invention; Figure 7This is a schematic diagram of the main structure of the roller component of the present invention; Figure 8 This is a schematic diagram of the main structure of the guide plate of the present invention; Figure 9 This is a schematic diagram of the main structure of the lifting component of the present invention.

[0020] In the diagram: 1. Base; 2. Horizontal slide table; 3. Longitudinal slide table; 4. Milling assembly; 5. Fixed seat; 6. Drive motor; 7. Rotating sleeve; 8. Reciprocating threaded rod; 9. Moving rod; 91. Rotating rod; 10. Sliding sleeve; 11. Receiving cylinder; 12. Return spring; 13. Vertical cylinder; 131. First one-way valve; 132. Spray nozzle; 14. First delivery pipe; 141. Second one-way valve; 15. Roller assembly; 151. Roller body; 152. Ratchet and pawl assembly; 153. Negative pressure plate; 16. Second delivery pipe; 17. Lifting component; 171. Fixed cylinder; 172. Matching spring; 173. Top rod; 174. Pressure valve; 18. Spray component; 19. Guide plate; 191. Guide flexible plate; 20. Drain port. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-9 The present invention provides the following technical solution: Reference Appendix Figure 1 -Appendix Figure 4A milling machine tool for a CNC machining center includes a base 1. A transverse slide 2 is mounted on one side of the top of the base 1. The execution end of the transverse slide 2 is fixedly connected to a longitudinal slide 3. The execution end of the longitudinal slide 3 acts on the outside of a milling assembly 4. The milling assembly 4 is a vertical spindle milling unit. The transverse slide 2 and the longitudinal slide 3 drive the milling assembly 4 to achieve horizontal transverse and vertical longitudinal feed, respectively. A fixed seat 5 is fixed to the side of the machining area of ​​the base 1. The fixed seat 5 is equipped with a drive unit and a cutting fluid follow-up spraying assembly. The cutting fluid follow-up spraying assembly includes a receiving cylinder 11, a vertical cylinder 13, and a return spring 12. The receiving cylinder 11 is rotatably mounted on the upper end of the fixed seat 5 and connected to the drive unit. The vertical cylinder 13 is sealed and slidably inserted into the receiving cylinder 11, and the return spring 12 is supported between the receiving cylinder 11 and the vertical cylinder 13. The lower end of the vertical cylinder 13 is rotatably provided with a roller component 15 for conforming to the surface of the workpiece. The receiving cylinder 11 is connected to a first delivery pipe 14 with a second one-way valve 141. The vertical cylinder 13 is provided with a water inlet with a first one-way valve 131 and a liquid outlet with a spray nozzle 132. When the vertical cylinder 13 extends and retracts with the roller component 15, the cutting fluid is drawn into the receiving cylinder 11 through the first delivery pipe 14 and pre-sprayed onto the surface of the workpiece through the spray nozzle 132. The spray nozzle 132 is divided into two groups. One group of spray nozzles 132 faces the negative pressure plate 153 at the top of the roller body 151, and the other group of spray nozzles 132 is inclined towards the surface of the workpiece to be processed.

[0023] In the initial state, the return spring 12 supports the vertical cylinder 13 to extend outward, keeping the roller component 15 in an extended position. When the machine tool is working, the transverse slide 2 and the longitudinal slide 3 cooperate to drive the milling assembly 4 to complete the horizontal transverse and vertical longitudinal feed, performing milling on the workpiece. During the process of the workpiece feeding into the processing area, the outer wall first contacts the roller component 15, and the thrust of the workpiece feed overcomes the elastic force of the return spring 12, pushing the vertical cylinder 13 to slide inward along the receiving cylinder 11. When the vertical cylinder 13 extends outward, the internal volume of the receiving cylinder 11 increases, forming a negative pressure. The second one-way valve 141 opens and the first one-way valve 131 closes, and the cutting fluid is drawn in through the first delivery pipe 14. Inside the receiving cylinder 11; when the vertical cylinder 13 retracts, the volume of the receiving cylinder 11 decreases, the internal cutting fluid pressure increases, the second one-way valve 141 closes and the first one-way valve 131 opens, the cutting fluid enters the inner cavity of the vertical cylinder 13 through the inlet and is finally sprayed out by the spray nozzle 132; one set of spray nozzles 132 sprays the cutting fluid onto the negative pressure plate 153 on the top of the roller body 151, and the cutting fluid is evenly coated on the workpiece surface as the roller body 151 rotates; the other set of spray nozzles 132 directly sprays the cutting fluid at an angle onto the workpiece surface to be machined, forming a continuous lubricating coolant film in advance before the cutting tool of the milling assembly 4 cuts into the workpiece, avoiding thermal shock at the moment the cutting tool cuts in.

[0024] Reference Appendix Figure 5 and attached Figure 6The drive unit includes a drive motor 6, a rotating sleeve 7, a reciprocating threaded rod 8, and a moving rod 9. The drive motor 6 is fixed inside the fixed base 5, the rotating sleeve 7 is coaxially fixed to the output end of the drive motor 6, the reciprocating threaded rod 8 is threaded inside the rotating sleeve 7, and the moving rod 9 is fixed to the outer end of the reciprocating threaded rod 8. The moving rod 9 is hinged to a rotating rod 91, and the other end of the rotating rod 91 is in sliding engagement with the sliding sleeve 10 on the outer side of the receiving cylinder 11.

[0025] When it is necessary to adapt to workpieces of different diameters and adjust the contact position of the spraying components, the drive motor 6 starts and drives the rotating sleeve 7 to rotate synchronously. The rotating sleeve 7 and the reciprocating threaded rod 8 are connected by a threaded transmission to convert the rotational motion into the axial reciprocating linear motion of the reciprocating threaded rod 8, which in turn drives the moving rod 9 to translate axially. During the translation of the moving rod 9, the hinged rotating rod 91 swings accordingly, and at the same time, the rod body of the rotating rod 91 slides inside the sliding sleeve 10, which in turn pushes the receiving cylinder 11 to swing around its hinge axis with the fixed seat 5, adjusting the radial position and spraying angle of the roller component 15, so as to ensure that the roller component 15 can stably fit the outer wall of the workpiece when processing workpieces of different diameters, and maintain the effective stroke of the follow-up spraying.

[0026] Reference Appendix Figure 7 The roller component 15 includes a roller body 151, a ratchet and pawl component 152, and several negative pressure discs 153. The roller body 151 is rotatably mounted on the lower end of the vertical cylinder 13. The ratchet and pawl component 152 is located between the roller body 151 and the vertical cylinder 13 to realize the unidirectional rotation of the roller body 151. The negative pressure discs 153 are arranged circumferentially on the outer side of the roller body 151.

[0027] During workpiece feeding, the friction between the outer wall of the workpiece and the roller body 151 drives the roller body 151 to rotate. The pawl of the ratchet and pawl part 152 cooperates with the ratchet to restrict the roller body 151 to rotate only in the workpiece feeding direction, preventing the roller body 151 from slipping and scratching the workpiece surface in the opposite direction, while ensuring that the extension and retraction of the vertical cylinder 13 is synchronized and stable with the workpiece feeding. During the rotation of the roller body 151, the circumferentially arranged negative pressure plate 153 rotates synchronously. The cutting fluid sprayed by the nozzle 132 adheres to the surface of the negative pressure plate 153 and is evenly coated onto the outer wall of the workpiece as the roller body 151 rotates. At the same time, the rotation of the negative pressure plate 153 generates a local negative pressure effect, adsorbing the cutting fluid and adhering it tightly to the workpiece surface, reducing droplet flow and dripping, and improving the uniformity and adhesion stability of the pre-coated liquid film.

[0028] Reference Appendix Figure 4 There are three sets of cutting fluid follow-up spraying components, and the three sets of receiving cylinders 11 are evenly arranged along the circumference of the fixed base 5; the two sets of cutting fluid follow-up spraying components located at the bottom are also connected to a cleaning and chip removal mechanism, which is set to correspond to the discharge port 20 of the base 1.

[0029] Three sets of receiving cylinders 11 are evenly arranged around the fixed base 5 to form a multi-station spraying layout around the workpiece: the uppermost cutting fluid follow-up spraying assembly is the pre-spraying station, responsible for lubricating the workpiece surface before the tool enters; the two sets of cutting fluid follow-up spraying assemblies below are the cleaning stations, corresponding to the area after the workpiece is processed; after the workpiece completes the milling process, it continues to feed and passes through the two sets of spraying assemblies below in sequence. The pressure of the cutting fluid generated by the extension and retraction of the vertical cylinder 13 directly washes the surface of the workpiece after processing, taking away the attached chips and residual heat; the other part is transported to the cleaning and chip removal mechanism to wash the processing area table. Finally, the chips and waste liquid are discharged together through the drain port 20, realizing continuous operation of pre-coating lubrication and post-processing cleaning.

[0030] Reference Appendix Figure 8 and attached Figure 9 The cleaning and chip removal mechanism includes a second conveying pipe 16, a lifting component 17, a water spray component 18, and a guide plate 19. The second conveying pipe 16 is connected to the side of the vertical cylinder 13, the lifting component 17 is fixed to the top of the base 1, and the water spray component 18 is installed on the top of the lifting component 17 and connected to the second conveying pipe 16. The guide plate 19 is inclinedly arranged below the processing area, and the lower end of the guide plate 19 corresponds to the discharge port 20. A guide plate 191 is provided at one end of the guide plate 19 near the discharge port 20, and the end of the guide plate 191 extends into the inside of the discharge port 20.

[0031] When pressurized cutting fluid is generated in the vertical cylinder 13 of the two sets of spraying components below, part of the cutting fluid is transported to the lifting component 17 through the second delivery pipe 16, and finally enters the water spray component 18 to be sprayed outward. The water spray component 18 sprays the table surface of the processing area and the top surface of the guide plate 19, and washes the scattered chips onto the inclined guide plate 19. The chips and mixed waste liquid flow downward along the inclined surface of the guide plate 19. When it flows through the guide plate 191, the guide plate 191 adheres to the inner wall of the discharge port 20 to form a guide channel, which avoids the chips and waste liquid from splashing and leaking out, and guides all the chips and waste liquid into the discharge port 20, completing the centralized collection and discharge of chips.

[0032] Reference Appendix Figure 9 The lifting component 17 includes a fixed cylinder 171, a cooperating spring 172, and a push rod 173. The fixed cylinder 171 is fixed to the base 1, and the push rod 173 is slidably inserted into the fixed cylinder 171. The cooperating spring 172 is supported between the bottom of the fixed cylinder 171 and the push rod 173. A pressure valve 174 is provided at the bottom of the push rod 173. The push rod 173 is hollow inside and communicates with the water spray component 18.

[0033] In the initial state, the spring 172 supports the push rod 173 upwards, keeping the water spray component 18 in an elastic floating state. This can adaptively compensate for installation errors and workpiece size fluctuations, avoiding rigid collisions during workpiece feeding. When the cutting fluid pressure delivered by the second delivery pipe 16 reaches the set threshold, the pressure valve 174 opens, and the cutting fluid enters the hollow inner cavity of the push rod 173, being delivered upwards to the water spray component 18 for spraying. When the fluid supply pressure is insufficient, the pressure valve 174 remains closed, prioritizing the fluid supply pressure of the upper pre-coating station to ensure stable pre-coating lubrication. Simultaneously, when the cutting fluid pressure fluctuates, the spring 172 drives the push rod 173 to extend and retract slightly along the fixed cylinder 171, maintaining the stability of the spray position of the water spray component 18.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A milling machine tool for a CNC machining center, comprising a base (1), wherein a transverse slide (2) is mounted on one side of the top of the base (1), the actuating end of the transverse slide (2) is fixedly connected to a longitudinal slide (3), and the actuating end of the longitudinal slide (3) acts on the outside of a milling machining assembly (4); characterized in that: The base (1) is fixed with a fixed seat (5) on the side of the processing area. The fixed seat (5) is equipped with a drive unit and a cutting fluid follow-up spraying assembly. The cutting fluid follow-up spraying assembly includes a receiving cylinder (11), a vertical cylinder (13), and a return spring (12); the receiving cylinder (11) is rotatably mounted on the upper end of the fixed base (5) and is connected to the drive unit for transmission; the vertical cylinder (13) is sealed and slidably inserted into the receiving cylinder (11); the return spring (12) is supported between the receiving cylinder (11) and the vertical cylinder (13); the lower end of the vertical cylinder (13) is rotatably provided with a roller (15) for conforming to the surface of the workpiece. The receiving cylinder (11) is connected to a first delivery pipe (14) with a second one-way valve (141). The vertical cylinder (13) is provided with an inlet with a first one-way valve (131) and an outlet with a spray nozzle (132). When the vertical cylinder (13) extends and retracts with the roller component (15), the cutting fluid is drawn into the receiving cylinder (11) through the first delivery pipe (14) and pre-sprayed onto the workpiece surface through the spray nozzle (132).

2. A milling machine tool for a CNC machining center according to claim 1, characterized in that: The drive unit includes a drive motor (6), a rotating sleeve (7), a reciprocating threaded rod (8), and a moving rod (9); the drive motor (6) is fixed inside the fixed base (5), the rotating sleeve (7) is coaxially fixed to the output end of the drive motor (6), the reciprocating threaded rod (8) is threaded inside the rotating sleeve (7), and the moving rod (9) is fixed to the outer end of the reciprocating threaded rod (8); the moving rod (9) is hinged to a rotating rod (91), and the other end of the rotating rod (91) is slidably engaged with the sliding sleeve (10) on the outside of the receiving cylinder (11).

3. A milling machine tool for a CNC machining center according to claim 1, characterized in that: The roller component (15) includes a roller body (151), a ratchet and pawl component (152), and several negative pressure discs (153); the roller body (151) is rotatably mounted on the lower end of the vertical cylinder (13), and the ratchet and pawl component (152) is located between the roller body (151) and the vertical cylinder (13) to realize the unidirectional rotation of the roller body (151); the negative pressure discs (153) are arranged circumferentially on the outside of the roller body (151).

4. A milling machine tool for a CNC machining center according to claim 1, characterized in that: The water nozzles (132) are divided into two groups. One group of water nozzles (132) faces the negative pressure plate (153) on the top of the roller body (151), and the other group of water nozzles (132) is tilted towards the workpiece surface to be processed.

5. A milling machine tool for a CNC machining center according to claim 1, characterized in that: The cutting fluid follow-up spraying assembly is provided in three sets, and the three sets of receiving cylinders (11) are evenly arranged along the circumference of the fixed seat (5).

6. A milling machine tool for a CNC machining center according to claim 5, characterized in that: The two sets of cutting fluid follow-up spraying components located below are also connected to a cleaning and chip removal mechanism, which is configured to correspond to the discharge port (20) of the base (1).

7. A milling machine tool for a CNC machining center according to claim 6, characterized in that: The cleaning and chip removal mechanism includes a second conveying pipe (16), a lifting component (17), a water spray component (18), and a guide plate (19); the second conveying pipe (16) is connected to the side of the vertical cylinder (13), the lifting component (17) is fixed to the top of the base (1), the water spray component (18) is installed on the top of the lifting component (17) and connected to the second conveying pipe (16); the guide plate (19) is inclinedly arranged below the processing area, and the lower end of the guide plate (19) corresponds to the drain port (20).

8. A milling machine tool for a CNC machining center according to claim 7, characterized in that: The lifting component (17) includes a fixed cylinder (171), a cooperating spring (172), and a top rod (173); the fixed cylinder (171) is fixed to the base (1), the top rod (173) is sealed and slidably inserted into the fixed cylinder (171), and the cooperating spring (172) is supported between the bottom of the fixed cylinder (171) and the top rod (173); the bottom of the top rod (173) is provided with a pressure valve (174), and the top rod (173) is hollow inside and communicates with the water spray component (18).

9. A milling machine tool for a CNC machining center according to claim 7, characterized in that: The guide plate (19) is provided with a guide plate (191) at one end near the drain (20), and the end of the guide plate (191) extends into the inside of the drain (20).

10. A milling machine tool for a CNC machining center according to claim 1, characterized in that: The milling assembly (4) is a vertical spindle milling unit. The transverse slide (2) and the longitudinal slide (3) drive the milling assembly (4) to achieve horizontal transverse and vertical longitudinal feed, respectively.

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