A milling cutter for machining a metal casting

Abstract

The present application relates to the technical field of milling cutter, in particular to a kind of milling cutter for metal casting processing, installed on milling machine, milling machine includes headstock, milling cutter includes milling fluid circulation assembly, cutter head and cooling ring;Headstock includes shell and main shaft;Cutter head is connected on main shaft;Milling fluid circulation assembly is cooled after oil-based milling fluid passes through cooler and flows out through cooling ring to form continuous annular oil curtain, and annular oil curtain is continuously cooled and lubricated to cutter head;The milling cutter with cooling ring of the present application, the main purpose of cooling ring is to cooperate with the effect of oil-based milling fluid and cooler, utilize the characteristic that the viscosity of oil-based milling fluid increases after cooling, combined with the continuous annular oil curtain formed when oil-based milling fluid flows out from the outlet of cooling ring, when milling, annular oil curtain can cool every position of the milling of cutter head with diameter less than it, while viscous oil-based milling fluid, more milling fluid can be adhered to the surface of cutter head, realize continuous and sufficient cooling and lubrication.

Description

Technical Field

[0001] This invention relates to the field of milling cutter technology, and more specifically to a milling cutter for machining metal castings. Background Technology

[0002] In modern manufacturing, milling cutters for metal casting are widely used in various metal processing fields, such as aerospace, automotive manufacturing, and machinery manufacturing. During the milling process, the various shapes and rough, uneven surfaces of the cast metal products, coupled with the large milling volume, lead to severe heat generation. Furthermore, the large contact area results in high heat dissipation, seriously affecting the lifespan of the milling cutter. Therefore, there is a need for a milling cutter for metal casting that provides sufficient cooling. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a milling cutter for machining metal castings that provides sufficient cooling for the milling cutter.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A milling cutter for machining metal castings is mounted on a milling machine, which includes a head milling machine and the milling cutter includes a milling fluid circulation assembly, a cutter head, and a cooling ring.

[0006] The machine head includes a housing and a spindle; the cutter head is connected to the spindle;

[0007] The milling fluid circulation assembly includes a collection tank, a collection box, a first circulation pump, a second circulation pump, a cooler, a bypass valve, and a universal bamboo-joint pipe; the milling fluid circulation assembly uses oil-based milling fluid for cooling and lubrication; a coarse filter screen is provided at the bottom of the collection tank, and the collection tank and the collection box are connected through the coarse filter screen; a fine filter screen is provided inside the collection tank; a circulation port is provided at the bottom of the side wall of the collection box;

[0008] The cooling ring has an annular structure with an inner ring larger than the diameter of the spindle and the cutter head. The cooling ring is fixed to the bottom of the housing and coaxial with the spindle. An inlet is provided on the side wall of the cooling ring, and an annular outlet is provided at the bottom of the cooling ring. The circulation port, the first circulation pump, the cooler, and the inlet of the cooling ring are sequentially connected to form a first oil circuit. The cooler cools the oil-based milling fluid passing through it, increasing the viscosity of the oil-based milling fluid while maintaining its fluidity. When the first circulation pump is working, the oil-based milling fluid flows out of the outlet of the cooling ring, forming a continuous annular oil curtain, which continuously cools and lubricates the cutter head.

[0009] The circulation port, the second circulation pump, and the universal bamboo tube are connected in sequence to form the second oil circuit. The universal bamboo tube is located at the bottom of the outer casing and outside the cooling ring. When in use, the universal bamboo tube is bent inward and passes through the oil curtain. The cooler is also connected to the universal bamboo tube through a bypass valve.

[0010] Preferably, the milling machine further includes a worktable, with the milling head located above the worktable; the worktable is located within a collection trough.

[0011] Preferably, the milling fluid circulation assembly further includes a controller; a heater is also provided between the first circulation pump and the universal bamboo tube; and a temperature sensor is provided inside the universal bamboo tube.

[0012] The controller is electrically connected to the first circulating pump, the second circulating pump, the temperature sensor, and the bypass valve, respectively; the controller controls the operation of the heater and the bypass valve based on the data from the temperature sensor.

[0013] Preferably, the controller controls the operation of the first circulation pump and the second circulation pump. When the spindle is working, the controller controls the first circulation pump and the second circulation pump to work synchronously with the spindle.

[0014] Preferably, the worktable is used to place the workpiece; after the spindle finishes milling the workpiece, the controller controls the first circulation pump to stop working, and at the same time starts the heater and the second circulation pump to heat and rinse the worktable surface, the workpiece surface and the spindle.

[0015] Preferably, the milling fluid circulation assembly further includes a vibration motor, which is located outside the collection tank to vibrate and exhaust air from the collection tank.

[0016] Preferably, the controller is electrically connected to the vibration motor, and the controller controls the vibration motor to stop working when the spindle is working.

[0017] Preferably, the milling fluid circulation assembly further includes a replenishment tank containing oil-based milling fluid;

[0018] The liquid collection tank is equipped with a liquid level sensor;

[0019] The replenishment tank is connected to the second circulation pump via a solenoid valve;

[0020] The controller is electrically connected to the liquid level sensor and the solenoid valve;

[0021] When the liquid level in the collection tank obtained by the liquid level sensor is lower than the preset value, the controller controls the solenoid valve to connect and supply oil-based milling fluid to the second oil circuit.

[0022] Preferably, the milling fluid circulation assembly further includes an alarm;

[0023] When the liquid level in the collection tank, as detected by the liquid level sensor, is lower than a preset value, an alarm is triggered, and the controller simultaneously controls the spindle to decelerate until it stops.

[0024] Preferably, the collection trough is funnel-shaped.

[0025] Preferably, the bottom of the collection tank is also provided with a slag discharge port.

[0026] The beneficial effects of this invention are as follows: The end mill with a cooling ring primarily functions in conjunction with the oil-based milling fluid and cooler. Utilizing the increased viscosity of the oil-based milling fluid after cooling, a continuous annular oil curtain is formed as the fluid flows out of the cooling ring. During milling, this annular oil curtain can cool every part of the milling area on the cutter head with a diameter smaller than the cutter head. Simultaneously, the high viscosity of the oil-based milling fluid allows for greater adhesion to the cutter head surface, achieving continuous and sufficient cooling and lubrication. Furthermore, when flying debris passes through the high-viscosity oil curtain, the downward potential energy of the annular oil curtain obstructs and slows the debris. Due to its high viscosity, the milling fluid adheres to the surface of the debris even after it passes through the annular oil curtain. When the debris comes into contact with other components, the oil-based milling fluid on the surface acts as a buffer, preventing excessive debris accumulation caused by solid blocking components. Finally, the formed annular oil curtain does not interfere with the spindle machining process. Furthermore, the universal bamboo-joint tube is located at the bottom of the casing and outside the cooling ring. The annular oil curtain can block most of the flying debris, preventing damage to the universal bamboo-joint tube. During use, the universal bamboo-joint tube is bent inward to pass through the oil curtain, enabling normal localized cooling of the oil-based milling fluid and avoiding interference between the two oil circuits. Moreover, the bypass valve allows for adjustment of the temperature of the oil-based milling fluid discharged from the universal bamboo-joint tube as needed, ensuring the cooling effect. The viscosity of the oil-based milling fluid is significantly affected by temperature changes. Higher viscosity results in a more significant deceleration effect on flying debris and better adhesion. At the same time, the oil-based milling fluid is less prone to splashing, reducing the mixing of other lubricating substances, extending cycle life, and the higher viscosity also makes it easier to form an oil curtain. The fine filter prevents clogging. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first angle structure of a milling cutter for machining metal castings according to a specific embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the second angle structure of a milling cutter for machining metal castings according to a specific embodiment of the present invention;

[0029] Figure 3 This is a cross-sectional view of a milling cutter for machining metal castings according to a specific embodiment of the present invention;

[0030] Figure 4 for Figure 3 A magnified view of part A;

[0031] Labeling Explanation: 1. Machine Head; 11. Housing; 12. Spindle; 2. Worktable; 3. Milling Fluid Circulation Assembly; 31. Collection Tank; 311. Coarse Filter; 32. Collection Tank; 321. Fine Filter; 322. Circulation Port; 323. Vibration Motor; 324. Liquid Level Sensor; 325. Slag Discharge Port; 33. First Circulation Pump; 34. Second Circulation Pump; 35. Cooler; 36. Bypass Valve; 37. Universal Joint Tube; 38. Cooling Ring; 381. Inlet; 382. Annular Outlet; 39. Replenishment Tank; 4. First Oil Circuit; 5. Second Oil Circuit; 51. Heater. Detailed Implementation

[0032] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0033] Please refer to Figures 1 to 4 A milling cutter for machining metal castings is mounted on a milling machine, which includes a head 1 and the milling cutter includes a milling fluid circulation assembly 3, a cutter head, and a cooling ring 38.

[0034] The head 1 includes a housing 11 and a spindle 12; the milling cutter includes a cutter head and a cooling ring 38, the cutter head being connected to the spindle 12;

[0035] The milling fluid circulation assembly 3 includes a collection tank 31, a collection box 32, a first circulation pump 33, a second circulation pump 34, a cooler 35, a bypass valve 36, and a universal joint pipe 37; the milling fluid circulation assembly 3 uses oil-based milling fluid for cooling and lubrication; a coarse filter screen 311 is provided at the bottom of the collection tank 31, and the collection tank 31 and the collection box 32 are connected through the coarse filter screen 311; a fine filter screen 321 is provided inside the collection tank 31; a circulation port 322 is provided at the bottom of the side wall of the collection box 32;

[0036] The cooling ring 38 has an annular structure with an inner ring larger than the diameter of the spindle 12 and the cutter head. The cooling ring 38 is fixed to the bottom of the housing 11 and coaxially arranged with the spindle 12. An inlet 381 is provided on the side wall of the cooling ring 38, and an annular outlet 382 is provided at the bottom of the cooling ring 38. The circulation port 322, the first circulation pump 33, the cooler 35, and the inlet 381 of the cooling ring 38 are sequentially connected to form the first oil passage 4. The cooler 35 cools the oil-based milling fluid, increasing its viscosity while maintaining its fluidity. When the first circulation pump 33 is working, the oil-based milling fluid flows out of the outlet of the cooling ring 38, forming a continuous annular oil curtain, which continuously cools and lubricates the cutter head.

[0037] The circulation port 322, the second circulation pump 34, and the universal bamboo tube 37 are connected in sequence to form the second oil passage 5. The universal bamboo tube 37 is located at the bottom of the outer casing 11 and outside the cooling ring 38. When in use, the universal bamboo tube 37 is bent inward and passes through the oil curtain. The cooler 35 is also connected to the universal bamboo tube 37 through the bypass valve 36.

[0038] As described above, the purpose of the end mill with the cooling ring 38 is to work in conjunction with the oil-based milling fluid and the cooler 35. Utilizing the characteristic that the viscosity of the oil-based milling fluid increases after cooling, and combined with the continuous annular oil curtain formed when the oil-based milling fluid flows out of the outlet of the cooling ring 38, the annular oil curtain can cool every part of the milling area of ​​the cutter head with a diameter smaller than its own during milling. Simultaneously, the high viscosity of the oil-based milling fluid allows it to adhere more to the cutter head surface, achieving continuous and sufficient cooling and lubrication. When the flying debris is generated, it passes through the high-viscosity oil curtain. Due to the downward potential energy of the annular oil curtain, the flying debris can be blocked and slowed down. Due to its high viscosity, the milling oil can also adhere to the surface of the flying debris after it passes through the annular oil curtain. When the flying debris comes into contact with other components, the oil-based milling fluid on the surface can act as a buffer to prevent the sharp edges from damaging other components, thus playing a role in slowing down and protecting them. At the same time, it avoids the problem of excessive accumulation of flying debris caused by solid shielding components. Meanwhile, the annular oil curtain formed will not interfere with the machining process of the spindle 12. Furthermore, the universal bamboo tube 37 is located at the bottom of the housing 11 and outside the cooling ring 38. The annular oil curtain can block most of the flying chips, preventing them from damaging the universal bamboo tube 37. During use, the universal bamboo tube 37 is bent inward to pass through the oil curtain, enabling normal localized cooling of the oil-based milling fluid and avoiding interference between the two oil circuits. Moreover, the bypass valve 36 allows for adjustment of the temperature of the oil-based milling fluid discharged from the universal bamboo tube 37 as needed, ensuring the cooling effect. The viscosity of the oil-based milling fluid is significantly affected by temperature changes. Higher viscosity results in a more significant deceleration effect on flying chips and better adhesion. At the same time, the oil-based milling fluid is less prone to splashing, reducing the mixing of other lubricating substances, extending cycle life, and the higher viscosity also makes it easier to form an oil curtain. The fine filter 321 prevents clogging.

[0039] Furthermore, the milling machine also includes a worktable 2, with the head 1 located above the worktable 2; the worktable 2 is located within the collection tank 31. Furthermore, the milling fluid circulation assembly 3 also includes a controller; a heater 51 is also provided between the first circulation pump 33 and the universal joint tube 37; a temperature sensor is provided inside the universal joint tube 37.

[0040] The controller is electrically connected to the first circulating pump 33, the second circulating pump 34, the temperature sensor, and the bypass valve 36 respectively; the controller controls the operation of the heater 51 and the bypass valve 36 according to the data from the temperature sensor.

[0041] As can be seen from the above description, the output temperature of the oil-based milling fluid can be adjusted according to the actual situation by setting the heater 51. Especially for the machining of the spindle 12, if the temperature of the oil-based milling fluid is too low, it will cause the second oil circuit 5 to cool the spindle 12 too low, resulting in excessive viscosity, which is not conducive to chip removal.

[0042] Furthermore, the controller controls the operation of the first circulation pump 33 and the second circulation pump 34. When the spindle 12 is working, the controller controls the first circulation pump 33 and the second circulation pump 34 to work synchronously with the spindle 12.

[0043] As can be seen from the above description, by having the first circulating pump 33 and the second circulating pump 34 work synchronously with the spindle 12, it can be ensured that the flying chips generated during milling can be cooled and blocked.

[0044] Furthermore, the worktable 2 is used to place the workpiece; after the spindle 12 finishes milling the workpiece, the controller controls the first circulation pump 33 to stop working, and at the same time starts the heater 51 and the second circulation pump 34 to heat and rinse the surface of the worktable 2, the surface of the workpiece and the spindle 12.

[0045] As can be seen from the above description, heating the oil-based milling fluid can reduce the amount of oil-based milling fluid with high viscosity after cooling that adheres to the workpiece and the surface of the worktable 2, thus reducing waste and lowering subsequent cleaning costs.

[0046] Furthermore, the milling fluid circulation assembly 3 also includes a vibration motor 323, which is disposed outside the fluid collection tank 32 to vibrate and exhaust the fluid collection tank 32.

[0047] As can be seen from the above description, by setting up the vibration motor 323, the liquid collection tank 32 is vibrated to exhaust gas, avoiding the gas from entering the two circulation pumps in the gas inlet, reducing the problem of emulsification, and at the same time, it can also accelerate the circulation and recovery of oil-based milling oil.

[0048] Furthermore, the controller is electrically connected to the vibration motor 323, and when the spindle 12 is working, the controller controls the vibration motor 323 to stop working.

[0049] As can be seen from the above description, the vibration motor 323 stops working when the spindle 12 is working, which can avoid the vibration from interfering with the spindle 12.

[0050] Furthermore, the milling fluid circulation assembly 3 also includes a replenishment tank 39, which contains oil-based milling fluid;

[0051] The liquid collection tank 32 is equipped with a liquid level sensor 324;

[0052] The replenishment tank 39 is connected to the second circulation pump 34 via a solenoid valve;

[0053] The controller is electrically connected to the level sensor 324 and the solenoid valve;

[0054] When the liquid level in the collection tank 32 obtained by the liquid level sensor 324 is lower than the preset value, the controller controls the solenoid valve to connect and supply oil-based milling fluid to the second oil circuit 5.

[0055] As can be seen from the above description, by adopting the replenishment tank 39, since blockage of the milling fluid oil passage is a frequent occurrence during the milling process, the addition of the replenishment tank 39 can prevent accidents caused by cooling failure.

[0056] Furthermore, the milling fluid circulation assembly 3 also includes an alarm;

[0057] When the liquid level in the collection tank 32 obtained by the liquid level sensor 324 is lower than the preset value, the alarm will sound and the controller will control the spindle 12 to decelerate until it stops.

[0058] As can be seen from the above description, the alarm system allows staff to handle blockages promptly; and by slowing down and stopping the machine, it avoids impacting the spindle 12 due to sudden stops.

[0059] Furthermore, the collection trough 31 is funnel-shaped.

[0060] As can be seen from the above description, the funnel-shaped collection tank 31 can conveniently and quickly collect oil-based milling fluid.

[0061] Furthermore, a slag discharge port 325 is provided at the bottom of the collection tank 31.

[0062] As can be seen from the above description, the slag discharge port 325 facilitates regular slag removal and maintenance.

[0063] Example 1

[0064] A milling cutter for machining metal castings is mounted on a milling machine, which includes a head 1 and the milling cutter includes a milling fluid circulation assembly 3, a cutter head, and a cooling ring 38.

[0065] The head 1 includes a housing 11 and a spindle 12; the milling cutter includes a cutter head and a cooling ring 38, the cutter head being connected to the spindle 12;

[0066] The milling fluid circulation assembly 3 includes a collection tank 31, a collection box 32, a first circulation pump 33, a second circulation pump 34, a cooler 35, a bypass valve 36, and a universal joint pipe 37; the milling fluid circulation assembly 3 uses oil-based milling fluid for cooling and lubrication; a coarse filter screen 311 is provided at the bottom of the collection tank 31, and the collection tank 31 and the collection box 32 are connected through the coarse filter screen 311; a fine filter screen 321 is provided inside the collection tank 31; a circulation port 322 is provided at the bottom of the side wall of the collection box 32;

[0067] The cooling ring 38 has an annular structure with an inner ring larger than the diameter of the spindle 12 and the cutter head. The cooling ring 38 is fixed to the bottom of the housing 11 and coaxially arranged with the spindle 12. An inlet 381 is provided on the side wall of the cooling ring 38, and an annular outlet 382 is provided at the bottom of the cooling ring 38. The circulation port 322, the first circulation pump 33, the cooler 35, and the inlet 381 of the cooling ring 38 are sequentially connected to form the first oil passage 4. The cooler 35 cools the oil-based milling fluid, increasing its viscosity while maintaining its fluidity. When the first circulation pump 33 is working, the oil-based milling fluid flows out of the outlet of the cooling ring 38, forming a continuous annular oil curtain, which continuously cools and lubricates the cutter head.

[0068] The circulation port 322, the second circulation pump 34, and the universal bamboo tube 37 are connected in sequence to form the second oil passage 5. The universal bamboo tube 37 is located at the bottom of the outer casing 11 and outside the cooling ring 38. When in use, the universal bamboo tube 37 is bent inward and passes through the oil curtain. The cooler 35 is also connected to the universal bamboo tube 37 through the bypass valve 36.

[0069] The milling machine also includes a worktable 2, with the head 1 located above the worktable 2; the worktable 2 is located inside the collection tank 31.

[0070] The collection trough 31 is funnel-shaped.

[0071] The bottom of the collection tank 31 is also provided with a slag discharge port 325.

[0072] Example 2

[0073] A milling cutter for machining metal castings, which is similar to Embodiment 1 and will not be repeated here, differs in that:

[0074] The milling fluid circulation assembly 3 also includes a controller; a heater 51 is also provided between the first circulation pump 33 and the universal bamboo tube 37; a temperature sensor is provided inside the universal bamboo tube 37;

[0075] The controller is electrically connected to the first circulating pump 33, the second circulating pump 34, the temperature sensor, and the bypass valve 36 respectively; the controller controls the operation of the heater 51 and the bypass valve 36 according to the data from the temperature sensor.

[0076] The controller controls the operation of the first circulation pump 33 and the second circulation pump 34. When the spindle 12 is working, the controller controls the first circulation pump 33 and the second circulation pump 34 to work synchronously with the spindle 12.

[0077] The worktable 2 is used to place the workpiece; after the spindle 12 finishes milling the workpiece, the controller controls the first circulation pump 33 to stop working, and at the same time starts the heater 51 and the second circulation pump 34 to heat and rinse the surface of the worktable 2, the surface of the workpiece and the spindle 12.

[0078] The milling fluid circulation assembly 3 also includes a vibration motor 323, which is located outside the collection tank 32 to vibrate and exhaust the fluid.

[0079] The controller is electrically connected to the vibration motor 323. When the spindle 12 is working, the controller controls the vibration motor 323 to stop working.

[0080] Example 3

[0081] A milling cutter for machining metal castings, which is similar to Embodiment 2 and will not be repeated here, differs in that:

[0082] The milling fluid circulation assembly 3 also includes a replenishment tank 39, which contains oil-based milling fluid;

[0083] The liquid collection tank 32 is equipped with a liquid level sensor 324;

[0084] The replenishment tank 39 is connected to the second circulation pump 34 via a solenoid valve;

[0085] The controller is electrically connected to the level sensor 324 and the solenoid valve;

[0086] When the liquid level in the collection tank 32 obtained by the liquid level sensor 324 is lower than the preset value, the controller controls the solenoid valve to connect and supply oil-based milling fluid to the second oil circuit 5.

[0087] The milling fluid circulation assembly 3 also includes an alarm;

[0088] When the liquid level in the collection tank 32 obtained by the liquid level sensor 324 is lower than the preset value, the alarm will sound and the controller will control the spindle 12 to decelerate until it stops.

[0089] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A milling cutter for processing a metal casting, which is installed on a milling machine, characterized in that, The milling machine comprises a head, the milling cutter comprises a milling fluid circulation assembly, a cutter head and a cooling ring; The head comprises a housing and a spindle; the cutter head is connected to the spindle; The milling fluid circulation assembly comprises a collecting groove, a liquid collecting tank, a first circulation pump, a second circulation pump, a cooler, a bypass valve and a universal bamboo joint pipe; the milling fluid circulation assembly uses oil-based milling fluid for cooling and lubrication; the collecting groove is provided with a coarse filter screen at the bottom, the collecting groove and the liquid collecting tank are communicated through the coarse filter screen, and the collecting groove is provided with a fine filter; the bottom of the side wall of the liquid collecting tank is provided with a circulation port; The cooling ring is in a ring structure and has an inner ring larger than the diameters of the spindle and the cutter head; the cooling ring is fixed at the bottom of the housing and coaxially arranged with the spindle, the side wall of the cooling ring is provided with an inlet, and the bottom of the cooling ring is provided with an annular outlet; the circulation port, the first circulation pump, the cooler and the inlet of the cooling ring are sequentially communicated to form a first oil circuit; the oil-based milling fluid passing through the cooler is cooled to increase the viscosity of the oil-based milling fluid while maintaining the fluidity; when the first circulation pump is working, the oil-based milling fluid flows out of the outlet of the cooling ring to form a continuous annular oil curtain, and the annular oil curtain continuously cools and lubricates the cutter head; The circulation port, the second circulation pump and the universal bamboo joint pipe are sequentially communicated to form a second oil circuit; the universal bamboo joint pipe is arranged at the bottom of the housing and located outside the cooling ring; when the universal bamboo joint pipe is used, the inwardly bent part of the universal bamboo joint pipe penetrates through the oil curtain; the cooler is further communicated with the universal bamboo joint pipe through the bypass valve.

2. The milling cutter for machining of metal castings according to claim 1, characterized in that, The milling machine further comprises a workbench, and the head is located above the workbench; the workbench is located in the collecting groove.

3. The milling cutter for machining of metal castings according to claim 2, characterized in that, The milling fluid circulation assembly further comprises a controller; a heater is further arranged between the first circulation pump and the universal bamboo joint pipe; a temperature sensor is arranged in the universal bamboo joint pipe; The controller is electrically connected with the first circulation pump, the second circulation pump, the temperature sensor and the bypass valve; the controller controls the working of the heater and the bypass valve according to the data of the temperature sensor.

4. The milling cutter for machining of metal castings according to claim 3, characterized in that, The controller controls the working of the first circulation pump and the second circulation pump; when the spindle is working, the controller controls the first circulation pump and the second circulation pump to work synchronously with the spindle.

5. The milling cutter for machining of metal castings according to claim 3, characterized in that, The workbench is used for placing a workpiece; after the milling of the spindle on the workpiece is completed, the controller controls the first circulation pump to stop working, and simultaneously controls the heater and the second circulation pump to heat and flush the surface of the workbench, the surface of the workpiece and the spindle.

6. The milling cutter for machining of metal castings according to claim 3, characterized in that, The milling fluid circulation assembly further comprises a vibration motor; the vibration motor is arranged outside the liquid collecting tank to vibrate and exhaust the liquid collecting tank.

7. The milling cutter for machining of metal castings according to claim 3, characterized in that, The controller is electrically connected with the vibration motor; when the spindle is working, the controller controls the vibration motor to stop working.

8. The milling cutter for machining of metal castings according to claim 3, characterized in that, The milling fluid circulation assembly further comprises a liquid supplement tank; the liquid supplement tank contains oil-based milling fluid; The liquid collecting tank is provided with a liquid level sensor; The liquid supplement tank is communicated with the second circulation pump through an electromagnetic valve; The controller is electrically connected with the liquid level sensor and the electromagnetic valve; When the liquid level of the liquid collecting tank obtained by the liquid level sensor is lower than a preset value, the controller controls the electromagnetic valve to supply oil-based milling fluid to the second oil circuit.

9. The milling cutter for machining of metal castings according to claim 8, characterized in that, The milling fluid circulation assembly further comprises an alarm. When the liquid level of the collecting tank acquired by the liquid level sensor is lower than a preset value, an alarm gives an alarm, and the controller controls the main shaft to slow down until it stops.

10. The milling cutter for machining of metal castings according to claim 1, characterized in that, The collecting groove is funnel-shaped; and a residue discharging port is further arranged at the bottom of the collecting groove.

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