Five-axis high-speed external milling machine for crankshaft machining

Abstract

The invention belongs to the technical field of five-axis machining, and particularly relates to a five-axis high-speed external milling machine for crankshaft machining, the five-axis high-speed external milling machine comprises a five-axis external milling machine body and a crankshaft body, a total operation arm is mounted on the five-axis external milling machine body, an operation support arm is mounted on the total operation arm, and a transmission shaft is rotatably arranged in the operation support arm. Under the action of the cooling and pressurizing assembly, external air enters the pressurizing base to be pressurized, the cooling and pressurizing assembly is matched with the lubricating assembly to enable low-temperature lubricating oil to cool air pumped into the pressurizing base, finally, high-pressure cold air is exhausted through the high-pressure air outlet pipe, and the primary cooling effect on the tool bit body is achieved; the temperature of the workpiece and the cutter is controlled to a great extent, thermal deformation of the crankshaft is reduced, extremely high machining size stability and geometric accuracy are ensured, meanwhile, the machining time is remarkably shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of five-axis machining technology, specifically a five-axis high-speed external milling machine for crankshaft machining. Background Technology

[0002] According to ISO standards, a right-handed Cartesian coordinate system is used to describe the motion of CNC machine tools. The coordinate axis parallel to the spindle is defined as the z-axis, and the rotational coordinates around the x, y, and z axes are A, B, and C, respectively. The motion of each coordinate axis can be achieved by the worktable or by the movement of the tool, but the direction is defined by the direction of the tool's movement relative to the workpiece. Usually, five-axis linkage refers to the linear interpolation motion of any five coordinates among x, y, z, A, B, and C. A search revealed that patent CN120422071A discloses a five-axis milling machine. The worktable has a movable frame on its side, and a working module for clamping workpieces is mounted on the movable frame. A rotating box connected to an external fluid supply assembly is rotatably mounted below the working module, and a nozzle for atomizing cutting fluid is disposed below the rotating box. A lubrication box is located on the side of the rotating box, and an oil supply mechanism is provided between the lubrication box and the lower surface of the working module. This five-axis milling machine allows for three-axis movement of the movable frame through the cooperation of X-axis, Y-axis, and Z-axis moving modules, enabling machining of workpieces at different distances as needed. The A-axis rotation module drives the placement table to rotate along the A-axis, and the C-axis rotation module drives the machining table to rotate along the C-axis. The five axes work together to mill the workpiece, improving machining efficiency.

[0003] In most patents or prior art, including the aforementioned patents, five-axis high-speed machine tools typically require a large amount of cutting fluid for cooling and lubrication during crankshaft machining. The cutting fluid used needs to be tested regularly for indicators such as concentration and pH value to prevent cutting fluid failure, which increases labor and testing costs. Furthermore, waste cutting fluid contains oil, chemical additives, and metal shavings, which are hazardous chemical wastes. If not handled properly, they can cause serious and lasting pollution to soil and water sources. In addition, the cutting fluid oil mist generated during high-speed machining can be easily inhaled by workers, affecting their health. Summary of the Invention

[0004] The purpose of this invention is to provide a five-axis high-speed external milling machine for crankshaft machining, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a five-axis high-speed external milling machine for crankshaft machining, comprising a five-axis external milling machine body and a crankshaft body, wherein a main operating arm is mounted on the five-axis external milling machine body, an operating support arm is mounted on the main operating arm, a transmission shaft is rotatably arranged inside the operating support arm, a cutter head body is fixedly mounted at the bottom end of the transmission shaft, and a cooling and pressurizing assembly is provided on the arc-shaped outer wall of the operating support arm; The cooling and pressurizing assembly includes a pressurizing base fixed to the bottom of the operating arm. An impeller body is fixedly installed on the outer wall of the drive shaft and tightly fitted to the inner wall of the pressurizing base. A cooling ring is fixedly installed on the arc-shaped outer wall of the pressurizing base. Both the pressurizing base and the cooling ring are hollow cavities. Multiple cooling liquid guide pipes are fixedly installed inside the cooling ring. Multiple air inlets are opened on the cooling ring, and a dryer filter body is fixedly installed on each air inlet. Multiple pressurizing outlet seats connected to the interior of the pressurizing base are fixedly installed on the arc-shaped outer wall of the pressurizing base. The interior of the pressurizing outlet seats is hollow. A Venturi tube body connected to the bottom of the pressurizing outlet seat is fixedly installed. A high-pressure air outlet pipe is fixedly installed at the bottom of the Venturi tube body. A cooling port is opened at the bottom of the high-pressure air outlet pipe.

[0006] Preferably, a motor body is mounted on the main operating arm, and the output end of the motor body is connected to the transmission shaft through a rotating shaft. A cutting table is mounted on the five-axis external milling machine body, and a cutting fixture for mounting the crankshaft body is fixedly provided on the top of the cutting table.

[0007] Preferably, a lubricating oil tank is fixedly installed on the body of the five-axis external milling machine, and the top end of each cooling liquid guide pipe is connected to the lubricating oil tank containing low-temperature lubricating oil through a pipe.

[0008] Preferably, the pressure booster seat has multiple air outlets on its arc-shaped outer wall, and each air outlet is connected to the interior of multiple pressure booster air outlet seats.

[0009] Preferably, the Venturi tube body includes an upper air guide tube connected to the bottom end of the side air outlet tube, a negative pressure tube is fixedly installed at the bottom of the upper air guide tube, a lower air guide tube is fixedly installed at the bottom of the negative pressure tube, and the upper air guide tube and the lower air guide tube are connected through the negative pressure tube.

[0010] Preferably, the diameter of the negative pressure pipe is smaller than the diameter of the side outlet pipe, and both the upper and lower air guide pipes are tapered, and the upper and lower air guide pipes are symmetrically arranged about the negative pressure pipe.

[0011] Preferably, the multiple cooling liquid guide pipes are arranged in a ring array, and each cooling liquid guide pipe is sleeved on the arc-shaped outer wall of the booster seat. A heat-conducting cylinder is provided on the inner wall side of the booster seat near the multiple cooling liquid guide pipes, and the heat-conducting cylinder is in close contact with the multiple cooling liquid guide pipes.

[0012] Preferably, a lubrication assembly is provided below the operating arm. The lubrication assembly includes a plurality of first liquid guide tubes respectively fixed to the bottom ends of a plurality of cooling liquid guide tubes. A semiconductor cooling ring is sleeved on the arc-shaped outer wall of the first liquid guide tube. A second liquid guide tube is fixedly provided at the bottom end of the first liquid guide tube, and one end of the second liquid guide tube is connected to the interior of the high-pressure exhaust pipe. A partition tube is fixedly provided on the inner wall of the high-pressure exhaust pipe.

[0013] Preferably, each of the first liquid guide tubes is fixedly provided with a heat-conducting ring at the position where it is sleeved with the semiconductor cooling ring, and the inside of the semiconductor cooling ring is a cavity, with multiple semiconductor cooling chips installed on the inner wall of the semiconductor cooling ring.

[0014] Preferably, one end of the second liquid guide tube extends into the interior of the negative pressure tube, and a negative pressure port is provided at the connection between the negative pressure tube and the second liquid guide tube. The top of the separator extends above the negative pressure port. With the cooperation of the cooling pressurization component and the lubrication component, the lubricating oil can enter the interior of the negative pressure tube through the negative pressure port. The separator can block the lubricating oil and allow the lubricating oil to enter between the separator and the negative pressure tube. During this process, the lubricating oil forms an oil film and adheres to the inner wall of the negative pressure tube, and is finally discharged through the cooling port.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: 1. This invention, by starting the motor body, allows outside air to enter the pressure booster seat under the action of the cooling and pressurizing component, and in conjunction with the lubrication component, allows the low-temperature lubricating oil to cool the air drawn into the pressure booster seat. Finally, the high-pressure cold air is discharged from the high-pressure exhaust pipe, which plays a preliminary role in cooling the cutter head body, greatly controlling the temperature of the workpiece and the tool, effectively reducing the thermal deformation of the crankshaft, ensuring extremely high machining dimensional stability and geometric accuracy, and significantly shortening the machining time, thus improving production efficiency. By setting the drying filter body, it can prevent the mixing of outside air containing moisture with the lubricating oil. Since water will contaminate the lubricating oil, change its viscosity, and cause the oil film strength to decrease, it will be impossible to form a stable oil film of sufficient thickness to isolate the metal surface. 2. This invention, by starting the motor body, allows the lubricating oil inside the lubricating oil tank to be drawn into the negative pressure pipe through the cooperation of the cooling and pressurizing components and the lubrication components. Then, the lubricating oil inside the negative pressure pipe can be sprayed at high speed onto the cutter head body under the driving force of high-pressure cold air, achieving precise lubrication at a fixed point and in a fixed quantity. Furthermore, during the process of the lubricating oil passing through the semiconductor cooling ring, multiple semiconductor cooling chips inside the semiconductor cooling ring can cool the lubricating oil, achieving a secondary cooling effect on the cutter head body, and simultaneously achieving a quantitative lubrication effect on the cutter head body. In addition, during the process of drawing lubricating oil from the cooling liquid guide pipe, the low-temperature lubricating oil inside the lubricating oil tank can be continuously drawn into the cooling liquid guide pipe, achieving a continuous cooling effect on the air inside the pressurizing seat. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall operating arm of the present invention; Figure 3 This is a schematic diagram of the connection structure between the operating arm and the cooling and pressurizing assembly of the present invention; Figure 4 This is a schematic cross-sectional view of one side of the operating arm of the present invention. Figure 5 This is a schematic diagram of the cooling and pressurizing assembly of the present invention; Figure 6 This is an exploded view of the cooling and pressurizing assembly of the present invention; Figure 7 This is a schematic cross-sectional view of the other side of the operating arm of the present invention. Figure 8 This is a schematic diagram of the lubrication assembly of the present invention; Figure 9 This is a schematic cross-sectional view of the Venturi tube body of the present invention. Figure 10 For the present invention Figure 9 Enlarged structural diagram at point A; Figure 11 This is a schematic cross-sectional view of the semiconductor cooling ring of the present invention; Figure 12 For the present invention Figure 11 A magnified structural diagram at point B in the middle.

[0017] In the diagram: 1. Five-axis external milling machine body; 11. Main operating arm; 111. Operating support arm; 12. Cutting head body; 121. Drive shaft; 13. Crankshaft body; 2. Cooling and pressurizing assembly; 21. Pressurizing seat; 211. Dryer filter body; 22. Impeller body; 23. Cooling ring; 24. Cooling liquid guide pipe; 241. Lubricating oil tank; 25. Pressurizing air outlet seat; 26. Side air outlet pipe; 27. Venturi tube body; 271. Upper air guide pipe; 272. Negative pressure pipe; 273. Lower air guide pipe; 28. High pressure air outlet pipe; 3. Lubrication assembly; 31. First liquid guide pipe; 32. Semiconductor cooling ring; 321. Semiconductor cooling chip; 33. Second liquid guide pipe; 34. Divider pipe. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0019] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0020] like Figures 1 to 12 As shown, a five-axis high-speed external milling machine for crankshaft machining includes a five-axis external milling machine body 1 and a crankshaft body 13. A main operating arm 11 is mounted on the five-axis external milling machine body 1, and an operating support arm 111 is mounted on the main operating arm 11. A transmission shaft 121 is rotatably arranged inside the operating support arm 111. A cutter head body 12 is fixedly mounted at the bottom end of the transmission shaft 121. A cooling and pressurizing assembly 2 is provided on the arc-shaped outer wall of the operating support arm 111. The cooling and pressurizing assembly 2 includes a pressurizing seat 21 fixed to the bottom of the operating arm 111. An impeller body 22 is fixedly installed on the outer wall of the drive shaft 121 and is tightly fitted to the inner wall of the pressurizing seat 21. A cooling ring 23 is fixedly installed on the arc-shaped outer wall of the pressurizing seat 21. Both the pressurizing seat 21 and the cooling ring 23 are cavities. Multiple cooling liquid guide pipes 24 are fixedly installed inside the cooling ring 23. Multiple air inlets are opened on the cooling ring 23, and a dryer filter body 211 is fixedly installed on each air inlet. Multiple pressurizing outlet seats 25 connected to the interior of the pressurizing seat 21 are fixedly installed on the arc-shaped outer wall of the pressurizing seat 21. The interior of the pressurizing outlet seat 25 is a cavity. A venturi tube body 27 connected to the bottom of the pressurizing outlet seat 25 is fixedly installed. A high-pressure outlet pipe 28 is fixedly installed at the bottom of the venturi tube body 27. A cooling port is opened at the bottom of the high-pressure outlet pipe 28. The main operating arm 11 is equipped with a motor body, and the output end of the motor body is connected to the transmission shaft 121 through a rotating shaft. The five-axis external milling machine body 1 is equipped with a cutting table, and the top of the cutting table is fixedly provided with a cutting fixture for mounting the crankshaft body 13. A lubricating oil tank 241 is fixedly installed on the body 1 of the five-axis external milling machine, and the top end of each cooling liquid guide pipe 24 is connected to the lubricating oil tank 241 containing low-temperature lubricating oil through a pipe. Multiple air outlets are provided on the arc-shaped outer wall of the booster seat 21, and each air outlet is connected to the interior of multiple booster air outlet seats 25 respectively; The Venturi tube body 27 includes an upper air guide tube 271 that is connected to the bottom end of the side air outlet tube 26. A negative pressure tube 272 is fixedly installed at the bottom of the upper air guide tube 271, and a lower air guide tube 273 is fixedly installed at the bottom of the negative pressure tube 272. The upper air guide tube 271 and the lower air guide tube 273 are connected through the negative pressure tube 272. The diameter of the negative pressure pipe 272 is smaller than the diameter of the side air outlet pipe 26. The upper air guide pipe 271 and the lower air guide pipe 273 are both tapered and are symmetrically arranged about the negative pressure pipe 272. Multiple cooling liquid guide pipes 24 are arranged in a ring array, and each cooling liquid guide pipe 24 is sleeved on the arc-shaped outer wall of the booster seat 21. A heat-conducting cylinder is provided on the inner wall side of the booster seat 21 near the multiple cooling liquid guide pipes 24, and the heat-conducting cylinder is in close contact with the multiple cooling liquid guide pipes 24. A lubrication assembly 3 is provided below the operating arm 111. The lubrication assembly 3 includes a plurality of first liquid guide tubes 31 respectively fixed to the bottom end of a plurality of cooling liquid guide tubes 24. A semiconductor cooling ring 32 is sleeved on the arc-shaped outer wall of the first liquid guide tube 31. A second liquid guide tube 33 is fixedly provided at the bottom end of the first liquid guide tube 31, and one end of the second liquid guide tube 33 is connected to the interior of the high pressure outlet pipe 28. A partition pipe 34 is fixedly provided on the inner wall of the high pressure outlet pipe 28. Each first liquid guide tube 31 is fixedly provided with a heat-conducting ring at the position where it is sleeved with the semiconductor cooling ring 32, and the inside of the semiconductor cooling ring 32 is a cavity, with multiple semiconductor cooling chips 321 installed on the inner wall of the semiconductor cooling ring 32. One end of the second liquid guide tube 33 extends into the interior of the negative pressure tube 272, and a negative pressure port is provided at the connection between the negative pressure tube 272 and the second liquid guide tube 33. The top of the partition tube 34 extends above the negative pressure port. With the cooperation of the cooling pressurization component 2 and the lubrication component 3, lubricating oil can enter the interior of the negative pressure tube 272 through the negative pressure port. The partition tube 34 can block the lubricating oil and allow the lubricating oil to enter between the partition tube 34 and the negative pressure tube 272. During this process, the lubricating oil forms an oil film and adheres to the inner wall of the negative pressure tube 272, and is finally discharged through the cooling port. When the crankshaft body 13 is machined using the five-axis external milling machine body 1, the motor body is started, and the cutter head body 12 installed at the bottom of the transmission shaft 121 is driven to rotate at high speed through the connection of the rotating shaft. At the same time, the impeller body 22 fixed on the outer wall of the transmission shaft 121 is driven to rotate at high speed. At this time, the impeller body 22 rotates at high speed around the position connected to the booster seat 21. The air inside the booster seat 21 can enter the interior of multiple booster outlet seats 25 under the action of the centrifugal force generated by the impeller body 22. At the same time, a negative pressure is generated between the booster seat 21 and the impeller body 22, which allows the air outside the booster seat 21 to enter through multiple air inlets. At this time, the moisture in the air outside the booster seat 21 can be released through the air inlets. The air is filtered through multiple dry filter cartridges 211, and the air entering the booster seat 21 can be repeatedly circulated into the booster outlet seat 25 under the action of centrifugal force. The centrifugal force generated by the rotation of the impeller body 22 can increase the air velocity inside the booster outlet seat 25, the side outlet pipe 26, and the venturi tube body 27. During the process of air passing through the booster seat 21, multiple cooling liquid guide pipes 24 containing low-temperature lubricating oil can absorb heat from the air, thus cooling the air inside the booster seat 21. As air continues to be input into the booster outlet seat 25, the cooled air can pass through the side outlet pipe 26 and the venturi tube body 27 and finally pass through the bottom of the high-pressure outlet pipe 28. The cooling vents provide initial cooling to the cutter head body 12. As air enters the negative pressure pipe 272 from the upper air guide pipe 271, the reduced cross-section of the pipe creates negative pressure inside the pipe 272. Since the cooling liquid guide pipe 24 is connected to the negative pressure pipe 272 via the first liquid guide pipe 31, lubricating oil from the multiple cooling liquid guide pipes 24 enters the negative pressure pipe 272 through the first liquid guide pipe 31 and the negative pressure vent. The separator pipe 34 blocks the lubricating oil, allowing it to enter the gap between the separator pipe 34 and the negative pressure pipe 272. During this process, the lubricating oil forms an oil film and adheres to the inner wall of the negative pressure pipe 272, while the side exhaust pipe... The high-pressure air discharged from 26 can push the oil film downwards and finally be discharged through the cooling port at the bottom of the high-pressure air outlet 28. During the process of the lubricating oil passing through the semiconductor cooling ring 32, the multiple semiconductor cooling chips 321 inside the semiconductor cooling ring 32 can cool the lubricating oil and play a secondary cooling role on the cutter head body 12, while also providing a quantitative lubrication for the cutter head body 12. During the process of the lubricating oil being drawn from the cooling liquid guide pipe 24, due to the negative pressure generated inside the cooling liquid guide pipe 24, the low-temperature lubricating oil inside the lubricating oil tank 241 can be continuously drawn into the cooling liquid guide pipe 24, which continuously cools the air inside the pressure booster seat 21.

[0021] The working principle and usage process of this invention are as follows: When machining the crankshaft body 13 using the five-axis external milling machine body 1, firstly, the motor body is started, and the cutter head body 12 installed at the bottom of the transmission shaft 121 is driven to rotate at high speed under the connection of the rotating shaft. At the same time, the impeller body 22 fixed on the outer wall of the transmission shaft 121 is driven to rotate at high speed. At this time, the impeller body 22 rotates at high speed around the position connected to the booster seat 21. The air inside the booster seat 21 can enter the interior of multiple booster outlet seats 25 under the action of the centrifugal force generated by the impeller body 22. At the same time, a negative pressure is generated between the booster seat 21 and the impeller body 22, which allows the air outside the booster seat 21 to pass through multiple... Air enters through one inlet. Moisture in the external air of the booster seat 21 is filtered by multiple dryer filter bodies 211. The air entering the booster seat 21 circulates repeatedly under centrifugal force into the booster outlet seat 25. The centrifugal force generated by the impeller body 22 increases the air velocity within the booster outlet seat 25, side outlet pipe 26, and venturi tube body 27. Furthermore, as the air passes through the booster seat 21, multiple cooling fluid pipes 24, filled with low-temperature lubricating oil, absorb heat from the air, cooling the air inside the booster seat 21. With the continuous input of air into the booster outlet seat 25... Cooling air can pass through the side exhaust pipe 26 and the venturi tube body 27, and finally be discharged through the cooling port at the bottom of the high-pressure exhaust pipe 28, which plays a preliminary role in cooling the cutter head body 12. As the air enters the negative pressure pipe 272 from the upper air guide pipe 271, the reduced pipe cross-section creates a negative pressure inside the negative pressure pipe 272. Since the cooling liquid guide pipe 24 is connected to the negative pressure pipe 272 through the first liquid guide pipe 31, the lubricating oil inside the multiple cooling liquid guide pipes 24 can enter the negative pressure pipe 272 through the first liquid guide pipe 31 and the negative pressure port. At this time, the partition pipe 34 can block the lubricating oil and allow the lubricating oil to enter the partition. The gap between pipe 34 and negative pressure pipe 272 allows lubricating oil to form an oil film and adhere to the inner wall of negative pressure pipe 272. High-pressure air discharged from side outlet pipe 26 pushes the oil film downward and finally discharges through the cooling port at the bottom of high-pressure outlet pipe 28. During the process of lubricating oil passing through semiconductor cooling ring 32, multiple semiconductor cooling plates 321 inside semiconductor cooling ring 32 can cool the lubricating oil. During the process of lubricating oil being drawn from inside cooling liquid pipe 24, due to the negative pressure generated inside cooling liquid pipe 24, the low-temperature lubricating oil inside lubricating oil tank 241 can be continuously drawn into cooling liquid pipe 24.

[0022] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A five-axis high speed external milling machine for crankshaft machining comprising a five-axis external milling machine body (1) and a crankshaft body (13), characterized in that, The five-axis external milling machine body (1) is provided with a total operating arm (11), the total operating arm (11) is provided with an operating support arm (111), the operating support arm (111) is internally rotatably provided with a transmission shaft (121), the bottom end of the transmission shaft (121) is fixedly provided with a tool bit body (12), and the arc-shaped outer wall of the operating support arm (111) is provided with a cooling and pressurizing assembly (2). The cooling and pressurizing assembly (2) comprises a pressurizing seat (21) fixed to the bottom of the operating support arm (111), the outer wall of the transmission shaft (121) is fixedly provided with an impeller body (22) tightly fitted with the inner wall of the pressurizing seat (21), the arc-shaped outer wall of the pressurizing seat (21) is fixedly provided with a cooling ring (23), the interiors of the pressurizing seat (21) and the cooling ring (23) are cavities, a plurality of cooling liquid guide pipes (24) are fixedly arranged in the interior of the cooling ring (23), a plurality of air inlets are formed in the cooling ring (23), and a dry filter core body (211) is fixedly arranged in each air inlet, the arc-shaped outer wall of the pressurizing seat (21) is fixedly provided with a plurality of pressurizing air outlet seats (25) in communication with the interior thereof, the interior of the pressurizing air outlet seat (25) is a cavity, the bottom end of the pressurizing air outlet seat (25) is fixedly provided with a Venturi tube body (27) in communication therewith, the bottom end of the Venturi tube body (27) is fixedly provided with a high-pressure air outlet pipe (28), and the bottom of the high-pressure air outlet pipe (28) is provided with a cooling port.

2. A five-axis high speed flank milling machine for machining of crankshafts according to claim 1, characterized in that, The total operating arm (11) is provided with a motor body, and the output end of the motor body is connected with the transmission shaft (121) through a rotating shaft, the five-axis external milling machine body (1) is provided with a cutting table, and the top of the cutting table is fixedly provided with a cutting fixing seat for mounting a crankshaft body (13).

3. A five-axis high speed flank milling machine for machining of crankshaft as claimed in claim 1 wherein, The five-axis external milling machine body (1) is fixedly provided with a lubricating oil tank (241), and the top end of each cooling liquid guide pipe (24) is connected with the lubricating oil tank (241) filled with low-temperature lubricating oil through a pipeline.

4. A five-axis high speed flank milling machine for machining of crankshaft as claimed in claim 1 wherein, The arc-shaped outer wall of the pressurizing seat (21) is provided with a plurality of air outlets in communication with the interiors of the plurality of pressurizing air outlet seats (25).

5. A five-axis high speed flank milling machine for machining of crankshaft as claimed in claim 1 wherein, The Venturi tube body (27) comprises an upper air guide pipe (271) in communication with the bottom end of the side air outlet pipe (26), the bottom of the upper air guide pipe (271) is fixedly provided with a negative pressure pipe (272), the bottom of the negative pressure pipe (272) is fixedly provided with a lower air guide pipe (273), and the upper air guide pipe (271) and the lower air guide pipe (273) are in communication through the negative pressure pipe (272).

6. A five-axis high-speed external milling machine for machining of a crankshaft according to claim 5, characterized in that, The diameter of the negative pressure pipe (272) is smaller than the diameter of the side air outlet pipe (26), the upper air guide pipe (271) and the lower air guide pipe (273) are both conical, and the upper air guide pipe (271) and the lower air guide pipe (273) are symmetrically arranged about the negative pressure pipe (272).

7. A five-axis high speed flank milling machine for machining of crankshafts according to claim 1, characterized in that, The plurality of cooling liquid pipes (24) are arranged in a ring array, each cooling liquid pipe (24) is sleeved on the arc-shaped outer wall of the booster seat (21), and the booster seat (21) is provided with a heat-conducting cylinder on the inner wall side close to the plurality of cooling liquid pipes (24), and the heat-conducting cylinder is closely attached to the plurality of cooling liquid pipes (24).

8. A five-axis high speed flank milling machine for machining of crankshafts according to claim 1, characterized in that, The lubricating assembly (3) is arranged below the operation arm (111), the lubricating assembly (3) comprises a plurality of first liquid pipes (31) fixed at the bottom ends of the plurality of cooling liquid pipes (24), the arc-shaped outer wall of the first liquid pipe (31) is sleeved with a semiconductor refrigeration ring (32), the bottom end of the first liquid pipe (31) is fixedly provided with a second liquid pipe (33), one end of the second liquid pipe (33) is communicated with the inside of the high-pressure gas outlet pipe (28), and the inner wall of the high-pressure gas outlet pipe (28) is fixedly provided with a separation pipe (34).

9. A five-axis high-speed external milling machine for machining of crankshafts according to claim 8, characterized in that, The first liquid pipe (31) is fixedly provided with a heat-conducting ring at the position where the semiconductor refrigeration ring (32) is sleeved, the inside of the semiconductor refrigeration ring (32) is a cavity, and a plurality of semiconductor refrigeration pieces (321) are mounted on the inner wall of the semiconductor refrigeration ring (32).

10. A five-axis high speed flank milling machine for machining of crankshafts according to claim 8, characterized in that, One end of the second liquid pipe (33) extends to the inside of the negative pressure pipe (272), a negative pressure port is formed at the connection between the negative pressure pipe (272) and the second liquid pipe (33), the top of the separation pipe (34) extends above the negative pressure port, under the cooperation of the cooling and pressurizing assembly (2) and the lubricating assembly (3), the lubricating oil can enter the inside of the negative pressure pipe (272) through the negative pressure port, the separation pipe (34) can block the lubricating oil and make the lubricating oil enter between the separation pipe (34) and the negative pressure pipe (272), and in this process, the lubricating oil forms an oil film and adheres to the inner wall of the negative pressure pipe (272), and finally is discharged through the cooling port.

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