CN116197375A

CN116197375A - Control method and device for aluminum copper vacuum centrifugal casting of induction motor rotor

Info

Publication number: CN116197375A
Application number: CN202310230567.7A
Authority: CN
Inventors: 葛明; 蒋利锋; 顾正洪; 陆剑峰
Original assignee: Zhejiang Dongjing Intelligent Equipment Co ltd
Current assignee: Zhejiang Dongjing Intelligent Equipment Co ltd
Priority date: 2023-01-14
Filing date: 2023-03-11
Publication date: 2023-06-02

Abstract

The invention discloses a control method and a device for aluminum copper vacuum centrifugal casting of an induction motor rotor, which are characterized in that the control method comprises the following steps: setting working parameters through a PLC control system, and setting delay time of a delay device in the electronic air valve according to the type of the rotor; and controlling the vacuum pump to vacuumize the energy storage barrel until the vacuum degree in the energy storage barrel reaches a set value, stopping the vacuum pump, and starting the vacuum pump when the vacuum degree in the energy storage barrel is insufficient, so that the vacuum degree in the energy storage barrel is kept at the set value. According to the invention, the centrifugal casting mechanism is controlled by the PLC control system to automatically perform centrifugal casting on the rotor core, and the vacuumizing time is set according to the type of the rotor core, so that the quality of the centrifugal casting of the rotor core is ensured.

Description

Control method and device for aluminum copper vacuum centrifugal casting of induction motor rotor

Technical Field

The invention relates to rotor centrifugal casting, in particular to a control method and a device for aluminum copper vacuum centrifugal casting of an induction motor rotor.

Background

The rotor is an important component of the motor, and the mass of the rotor determines the mass of the motor. The manufacturing of the rotor is a very complex work, and part of the rotor needs to cast end rings at two ends of a rotor core by aluminum liquid or copper liquid in the processing process, and aluminum liquid casting is generally adopted for saving cost; this process flow needs to be applied to centrifugal casting techniques. At present, the existing centrifugal casting is to pour aluminum liquid into a cavity directly for rotation and then form, wherein the air originally positioned in the cavity is discharged passively under the action of gravity centrifugal force after the aluminum liquid enters, which can cause the aluminum liquid to be injected for too long so as to deteriorate the fluidity of the aluminum liquid, therefore, aluminum needs to be heated to a higher temperature to ensure the normal running of casting, the energy consumption is increased and the quality of the aluminum liquid is reduced at the same time; meanwhile, a small amount of air is not completely discharged, so that bubbles and cavities can be formed in the aluminum liquid, the density and quality of the rotor are greatly reduced, and the rejection rate of products is increased;

in the prior art, in order to ensure the flow speed of aluminum liquid when the rotor core is centrifugally cast, the fluidity and the flow speed of the aluminum liquid can be ensured only by keeping the temperatures of the rotor core and the upper and lower dies at about 750 ℃, but the excessive temperature can cause oxidation reaction of aluminum and copper, so that the quality of the aluminum liquid and the copper liquid is poor, and the energy consumption generated by keeping the temperature at 750 ℃ is high. Therefore, a control method and a device for aluminum copper vacuum centrifugal casting of an induction motor rotor are provided.

Disclosure of Invention

The invention aims to solve the problems and provides a control method and a device for aluminum copper vacuum centrifugal casting of an induction motor rotor.

In order to achieve the purpose, the invention provides a control method for aluminum copper vacuum centrifugal casting of an induction motor rotor, which is characterized by comprising the following steps:

1) Setting working parameters through a PLC control system, and setting delay time of a delay device in the electronic air valve according to the type of the rotor;

2) Controlling the vacuum pump to vacuumize the energy storage barrel until the vacuum degree in the energy storage barrel reaches a set value, stopping the vacuum pump, and starting the vacuum pump when the vacuum degree in the energy storage barrel is insufficient, so that the vacuum degree in the energy storage barrel is kept at the set value;

3) Controlling the centrifugal casting upper die and the centrifugal casting lower die to be matched after the rotor is mounted on the centrifugal casting lower die through an automatic feeding manipulator;

4) After the mold is closed, a motor is controlled by a PLC control system to drive a rotor to rotate, meanwhile, a soup feeding manipulator is controlled to pour molten metal to a molten metal injection port, when a sensor on the soup feeding manipulator senses that the soup feeding manipulator overturns to pour molten metal, a signal is sent to the PLC control system, and the PLC control system controls an electronic air valve to be opened for vacuumizing;

5) When the inductor on the soup feeding manipulator senses that the soup feeding manipulator overturns upwards to reset, a signal is sent to the PLC control system, the PLC control system controls the delay device on the electronic air valve to start, and the electronic air valve is closed in a delayed manner;

6) Stopping rotating the motor after centrifugal casting is completed, and separating the upper centrifugal casting die and the lower centrifugal casting die; and then the PLC control system controls the manipulator to take down the rotor after centrifugal casting, and then the rotor is sent to the next cooling process.

Further preferably, the device comprises a frame, a centrifugal casting device and a molten metal injection port which are arranged on the frame, and a soup feeding manipulator for pouring molten metal to the centrifugal casting device; the centrifugal casting equipment comprises a casting mold arranged on a frame, a jacking mechanism arranged on the frame and used for driving the casting mold to be assembled and disassembled, a rotating mechanism used for driving the casting mold to rotate, a vacuumizing mechanism used for vacuumizing a rotor and used for accelerating the flowing speed of molten metal, and a PLC control system for controlling the centrifugal casting equipment to automatically perform centrifugal casting.

Further preferably, the casting mold driven to rotate by the rotating mechanism comprises a supporting seat installed on the frame, a rotating seat movably installed on the supporting seat, a bearing installed between the rotating seat and the supporting seat, a lower rotating disc installed on the rotating seat, a plurality of guide posts installed on the lower rotating disc, an upper rotating disc installed on the other end of the guide posts, a lower mold fixing seat installed on the guide posts in a sliding manner, a lower centrifugal casting mold installed on the lower mold fixing seat and an upper centrifugal casting mold installed on the upper rotating disc.

Further, the rotating mechanism comprises a motor frame arranged on the frame, a motor arranged on the motor frame, a synchronous pulley arranged on the motor and the rotating seat and a synchronous belt arranged on the synchronous pulley; the jacking mechanism is also arranged on the frame.

Further, the jacking mechanism comprises an air cylinder arranged on the frame and a jacking frame fixedly connected with the air cylinder; a fixed seat is arranged on the jacking frame, and a die closing ejector rod fixedly connected with the lower die fixed seat is movably arranged in the fixed seat; and a bearing is also arranged between the fixed seat and the die assembly ejector rod.

Further, an inner core is movably arranged in the die assembly ejector rod, one end of the inner core is provided with a material returning rod, the other end of the inner core is connected with a spring seat, a spring is arranged on the spring seat, and a bearing is also arranged between the spring and the fixed seat; and a hydraulic cylinder for jacking the spring seat is arranged on one side of the spring seat.

Further, an air extraction channel is arranged between the die assembly ejector rod and the inner core, an air extraction hole communicated with the air extraction channel is arranged on the fixing seat, and the air extraction hole is connected with a vacuumizing mechanism through a pipeline.

Further, the vacuumizing mechanism comprises an energy storage barrel connected with the air suction hole through a pipeline and a vacuum pump connected with the energy storage barrel through a pipeline; and the energy storage barrel is provided with a vacuum degree detection meter.

Further, a filter and an electronic air valve are connected to a pipeline connected with the air suction hole and the energy storage barrel, and a filter is connected to a pipeline connected with the energy storage barrel and the vacuum pump; and a time delay device is arranged on the electronic air valve.

Further, an inductor for inducing the soup feeding manipulator to overturn, pour and reset is arranged on the soup feeding manipulator.

According to the invention, the centrifugal casting mechanism is controlled by the PLC control system to automatically perform centrifugal casting on the rotor core, and the vacuumizing time is set according to the type of the rotor core, so that the quality of centrifugal casting of the rotor core is ensured, the problems that the vacuumizing time is insufficient or the vacuumizing time is too long are avoided, the vacuumizing time is equivalent to ineffective vacuumizing, the flowing speed of the metal liquid cannot be improved, the efficiency is improved, the quality is improved, negative pressure is generated in the rotor core due to the too long vacuumizing time, the metal liquid leaks into an air suction channel, the equipment is damaged, and the problem that casting is deformed is also caused;

through the arrangement of the vacuumizing mechanism, the flowing speed of the metal liquid is accelerated through vacuumizing when the rotor core is subjected to centrifugal casting, the influence on the casting quality of the rotor core caused by the fact that the metal liquid is solidified in advance is avoided, and meanwhile, the air in the rotor core is completely discharged through vacuumizing, so that no air bubbles and cavities exist in the rotor core after casting molding, the density is improved, and the casting efficiency is improved; and in order to ensure the flowing speed of the aluminum liquid and the copper liquid, the rotor iron core and the upper die and the lower die are not required to be heated, the temperature is kept at about 750 ℃, the energy consumption is reduced, and meanwhile, the possibility of oxidation reaction of the aluminum liquid and the copper liquid can be reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of a partial structure of the present invention;

FIG. 3 is a schematic view of a partial structure of the present invention;

fig. 4 is a schematic diagram of the control flow of the present invention.

Legend description: 1. a frame; 11. a molten metal injection port; 2. a centrifugal casting device; 3. casting a mold; 31. a support base; 32. a rotating seat; 33. a bearing; 34. a lower rotating disc; 35. a guide post; 36. an upper rotating disc; 37. a lower die fixing seat; 38. centrifugally casting a lower die; 39. centrifugally casting an upper die; 4. a jacking mechanism; 41. a cylinder; 42. a jacking frame; 43. a fixing seat; 44. closing the die and the ejector rod; 45. an inner core; 46. a material returning rod; 47. a spring seat; 48. a spring; 49. a hydraulic cylinder; 5. a rotation mechanism; 51. a motor frame; 52. a motor; 53. a synchronous pulley; 54. a synchronous belt; 6. a vacuum pumping mechanism; 61. an air extraction channel; 62. an air suction hole; 63. an energy storage barrel; 64. a vacuum pump; 65. a vacuum degree detection table; 66. a filter; 67. an electronic air valve.

Detailed Description

The invention further provides a control method and a device for aluminum copper vacuum centrifugal casting of an induction motor rotor, which are described in the following with reference to the accompanying drawings.

Referring to fig. 1 to 4, the apparatus comprises a frame 1, a centrifugal casting device 2 and a molten metal injection port 11 which are arranged on the frame 1, and a feeding manipulator for pouring molten metal into the centrifugal casting device 2; the centrifugal casting equipment 2 comprises a casting die 3 arranged on a frame 1, a jacking mechanism 4 arranged on the frame 1 and used for driving the casting die 3 to be assembled and disassembled, a rotating mechanism 5 used for driving the casting die 3 to rotate, a vacuumizing mechanism 6 used for vacuumizing a rotor and used for accelerating the flowing speed of molten metal, and a PLC control system for controlling the centrifugal casting equipment 2 to automatically perform centrifugal casting;

the centrifugal casting equipment 2 is controlled by the PLC control system to automatically perform centrifugal casting on the rotor core, and the vacuumizing time is set according to the type of the rotor core, so that the quality of the centrifugal casting of the rotor core is ensured;

through the arrangement of the vacuumizing mechanism 6, the flowing speed of the metal liquid is accelerated through vacuumizing when the rotor core is subjected to centrifugal casting, the influence on the casting quality of the rotor core caused by the fact that the metal liquid is solidified in advance is avoided, and meanwhile, the air in the rotor core is completely discharged through vacuumizing, so that no air bubbles and cavities exist in the rotor core after casting molding, the density is improved, and the casting efficiency is improved; and in order to ensure the flowing speed of the aluminum liquid and the copper liquid, the rotor iron core and the upper die and the lower die are not required to be heated, the temperature is kept at about 750 ℃, the energy consumption is reduced, and meanwhile, the possibility of oxidation reaction of the aluminum liquid and the copper liquid can be reduced.

Further, the casting mold 3 driven to rotate by the rotation mechanism includes a support base 31 mounted on the frame 1, a rotation base 32 movably mounted on the support base 31, a bearing 33 mounted between the rotation base 32 and the support base 31, a lower rotating disk 34 mounted on the rotation base 32, a plurality of guide posts 35 mounted on the lower rotating disk 34, an upper rotating disk 36 mounted on the other end of the guide post 35, a lower mold fixing base 37 slidably mounted on the guide post 35, a centrifugal casting lower mold 38 mounted on the lower mold fixing base 37, and a centrifugal casting upper mold 39 mounted on the upper rotating disk 36; the rotating mechanism 5 comprises a motor frame 51 arranged on the frame 1, a motor 52 arranged on the motor frame 51, a synchronous pulley 53 arranged on the motor 52 and the rotating seat 32 and a synchronous belt 54 arranged on the synchronous pulley 53; the jacking mechanism 4 is also arranged on the frame 1;

when centrifugal casting is performed, the synchronous belt 54 is driven to rotate by the motor 52, the synchronous belt 54 drives the rotary seat 32 to rotate, the rotary seat 32 drives the lower rotary disk 34, the lower rotary disk 34 drives the upper rotary disk 36, the centrifugal casting lower die 38, the centrifugal casting upper die 39 and the rotor core to rotate, and centrifugal casting is performed by the rotation.

Further, the jacking mechanism 4 comprises a cylinder 41 installed on the frame 1 and a jacking frame 42 fixedly connected with the cylinder 41; a fixed seat 43 is arranged on the jacking frame 42, and a die clamping ejector rod 44 fixedly connected with the lower die fixed seat 37 is movably arranged in the fixed seat 43; a bearing 33 is also arranged between the fixed seat 43 and the die clamping ejector rod 44; an inner core 45 is movably arranged in the die closing ejector rod 44, a material returning rod 46 is arranged at one end of the inner core 45, a spring seat 47 is connected with the other end of the inner core, a spring 48 is arranged on the spring seat 47, and a bearing 33 is also arranged between the spring 48 and the fixed seat 43; the bottom of the casting rack 21 is also provided with a hydraulic cylinder 49 corresponding to the position of the spring seat 47;

when the die is closed, the rotor core is mounted on the centrifugal casting lower die, the cylinder 41 is started, the cylinder 41 drives the jacking frame 42, the jacking frame 42 drives the die closing ejector rod 44, the die closing ejector rod 44 drives the lower die fixing seat 37 to move upwards along the guide pillar, the lower die fixing seat 37 drives the centrifugal casting lower die 38 and the rotor core mounted on the centrifugal casting lower die 38 to move upwards until the upper end of the rotor core is matched with the centrifugal casting upper die 39 to complete die closing, and centrifugal casting work can be performed after die closing;

after centrifugal casting is completed, the lifting mechanism 4 resets to drive the centrifugal casting lower die 38 and the centrifugal casting upper die 39 to split, a hydraulic cylinder 49 at the bottom is started after the die splitting, the hydraulic cylinder 49 extends upwards to a piston rod, the piston rod lifts up the spring seat 47 upwards, the spring seat 47 plays a role in compressing the spring 48 when lifting upwards, meanwhile, the inner core 45 is driven to move upwards, the inner core 45 drives the material returning rod 46 to move upwards, the material returning rod 46 upwards lifts up the rotor core, the rotor core can be removed and transferred to the next working procedure through a transferred manipulator, then the hydraulic cylinder 49 resets, and the material returning rod 46 and the inner core 45 reset through the reset force of the spring 48.

Further, an inner core 45 is movably installed in the mold closing ejector rod 44, a material returning rod 46 is installed at one end of the inner core 45, a spring seat 47 is connected to the other end of the inner core, a spring 48 is installed on the spring seat 47, and a bearing is also installed between the spring 48 and the fixing seat 43; a hydraulic cylinder 49 for jacking the spring seat 47 is arranged on one side of the spring seat 47; an air extraction channel 61 is arranged between the die clamping ejector rod 44 and the inner core 45, an air extraction hole 62 communicated with the air extraction channel 61 is arranged on the fixing seat 43, and the air extraction hole 62 is connected with the vacuumizing mechanism 6 through a pipeline.

Through the arrangement of the air suction channel 61 and the air suction holes 62, the vacuumized pipeline is communicated with the interior of the rotor core, so that the interior of the rotor core can be vacuumized through the vacuumized mechanism 6.

Further, the vacuum pumping mechanism 6 comprises an energy storage barrel 63 connected with the air suction hole 62 through a pipeline and a vacuum pump 64 connected with the energy storage barrel 63 through a pipeline; the energy storage barrel 63 is provided with a vacuum degree detection meter 65; through the arrangement of the energy storage barrel 63, the energy storage barrel 63 is vacuumized through the vacuum pump 64, so that the set vacuum degree is kept in the energy storage barrel 63, and when the electronic air valve 67 is opened, the interior of the rotor core can be vacuumized directly through the air suction channel 61; the vacuum degree in the energy storage barrel 63 is detected through the arrangement of the vacuum degree detector 65, vacuum degree data are sent to the PLC control system, and the PLC control system controls the on-off of the vacuum pump 64 according to the vacuum degree, so that the set vacuum degree is kept in the energy storage barrel 63.

Further, a filter 66 and an electronic air valve 67 are connected to a pipeline connected with the air suction hole 62 and the energy storage barrel 63, and a filter 66 is connected to a pipeline connected with the energy storage barrel 63 and the vacuum pump 64; the electronic air valve 67 is provided with a time delay device; the electronic air valve 67 is used for controlling the opening and closing of the vacuumizing pipeline; through the arrangement of the filter 66, the extracted air is filtered, impurities are prevented from entering the energy storage barrel 63 and the vacuum pump 64, and meanwhile, the protection function is also achieved, and the damage caused by the fact that aluminum liquid is pumped into the energy storage barrel 63 or the vacuum pump 64 during vacuumizing is avoided; through the setting of the time delay device, different time delay time lengths are set according to different rotor iron cores, the problems that the vacuumizing time length is insufficient or the vacuumizing time length is overlong are avoided, the vacuumizing time length is insufficient and is equivalent to invalid vacuumizing, the effect of improving the flowing speed of the metal liquid, improving the efficiency and improving the quality cannot be achieved, the vacuumizing time length is overlong and can lead to negative pressure inside, the metal liquid leaks into the air suction channel 61, equipment is damaged, and the problem of deformation of casting can be caused.

Further, an inductor for inducing the soup feeding manipulator to overturn, pour and reset is arranged on the soup feeding manipulator; the inductor senses the pouring of the soup feeding mechanical arm and the reset after the pouring is completed, and the reset is used as a signal for opening the electronic air valve 67 and the delay device.

The working process of the invention comprises the following steps: firstly, working parameters of the centrifugal casting equipment 2 are set through a PLC control system, and meanwhile, the delay time of a delay device in the electronic air valve 67 is set according to signals of a rotor, for example, when the height of the rotor is 90mm and the diameter of a shaft hole is 15.958mm, the delay time is 4.86-5 s; when the rotor height is 80mm and the shaft hole diameter is 15.958mm, the time delay time is 4.55-4.8 s; when the rotor height is 75mm and the shaft hole diameter is 15.958mm, the time delay time is 3.9-4.2 s; when the rotor height is 85mm and the shaft hole diameter is 14.286mm, the time delay time is 4.5-4.7 s; when the rotor height is 65mm and the shaft hole diameter is 15.958mm, the time delay time is 3.5-3.7 s;

after a manipulator for transferring the rotor in the production line places the heated rotor on the centrifugal casting lower die 38, the PLC control system controls the air cylinder 41 to start, the air cylinder 41 drives the fixed seat 43 to move upwards, the fixed seat 43 drives the die clamping ejector rod 44 to move upwards, and the die clamping ejector rod 44 drives the lower die fixed seat 37 and the centrifugal casting lower die 38 to move upwards until the upper end of the rotor is matched with the centrifugal casting upper die 39 to finish die clamping; then the PLC control system controls a soup feeding manipulator for conveying molten metal in the production line to take the molten metal and then move the molten metal to the position above the molten metal injection port 11, and simultaneously controls a motor 52 to start, the motor 52 drives a rotating seat 32 to rotate through a synchronous belt 54, and the rotating seat 32 drives a lower rotating disc 34, a lower die fixing seat 37 and an upper rotating disc 36 to rotate;

then the PLC control system controls the soup feeding manipulator to overturn downwards to pour molten metal into the molten metal injection port 11, when a sensor on the soup feeding manipulator senses that the soup feeding manipulator overturns downwards to pour the molten metal, a signal is sent to the PLC control system, the PLC control system controls the electronic air valve 67 to be opened, the energy storage barrel 63 vacuumizes the inside of the rotor iron core through the air suction channel 61, when the soup feeding manipulator resets upwards after the pouring of the soup feeding manipulator is completed, the sensor senses that the soup feeding manipulator resets and then sends the signal to the PLC control system, the PLC control system controls the delay device to start, the electronic air valve 67 is closed to count down, and the vacuumizing is stopped after the delay is finished, so that the vacuumizing duration is avoided to be too long;

when the centrifugal casting of the rotor core is completed, the motor 52 stops, rotation is stopped, the cylinder 41 is reset, the centrifugal casting upper die 39 and the centrifugal casting lower die 38 are driven to separate, then the PLC control system controls the hydraulic cylinder 49 to start, the piston rod is pushed out, the piston rod lifts the spring seat 47 upwards, the spring seat 47 plays a compression role on the spring 48 when lifted upwards, meanwhile, the inner core 45 is driven to move upwards, the inner core 45 drives the material returning rod 46 to move upwards, the material returning rod 46 lifts the rotor core upwards, the manipulator for transferring can be controlled by the PLC control system to take down and transfer the rotor core to the next process, then the hydraulic cylinder 49 is reset, the material returning rod 46 and the inner core 45 are reset through the reset force of the spring 48, and the next rotor is waited for centrifugal casting.

The scope of protection of the present invention is not limited to the above embodiments and variations thereof. Conventional modifications and substitutions by those skilled in the art based on the content of the present embodiment fall within the protection scope of the present invention.

Claims

1. A control method for aluminum copper vacuum centrifugal casting of an induction motor rotor is characterized by comprising the following steps:

2. An apparatus controlled by a control method of induction machine rotor aluminum copper vacuum centrifugal casting as claimed in claim 1, characterized in that: the device comprises a frame (1), a centrifugal casting device (2) and a molten metal injection port (11) which are arranged on the frame (1), and a soup feeding manipulator for pouring molten metal to the centrifugal casting device (2); the centrifugal casting device (2) comprises a casting die (3) arranged on the frame (1), a jacking mechanism (4) arranged on the frame (1) and used for driving the casting die (3) to be clamped and separated, a rotating mechanism (5) used for driving the casting die (3) to rotate, a vacuumizing mechanism (6) used for vacuumizing a rotor and used for accelerating the flowing speed of molten metal, and a PLC control system for controlling the centrifugal casting device (2) to automatically perform centrifugal casting.

3. The apparatus for controlling a vacuum centrifugal casting method of aluminum copper for a rotor of an induction motor according to claim 2, wherein: the casting mold (3) driven to rotate by the rotating mechanism comprises a supporting seat (31) arranged on the frame (1), a rotating seat (32) movably arranged on the supporting seat (31), a bearing (33) arranged between the rotating seat (32) and the supporting seat (31), a lower rotating disc (34) arranged on the rotating seat (32), a plurality of guide posts (35) arranged on the lower rotating disc (34), an upper rotating disc (36) arranged at the other end of the guide posts (35), a lower mold fixing seat (37) arranged on the guide posts (35) in a sliding manner, a centrifugal casting lower mold (38) arranged on the lower mold fixing seat (37) and a centrifugal casting upper mold (39) arranged on the upper rotating disc (36).

4. A device for controlling a vacuum centrifugal casting method of aluminum copper for an induction motor rotor according to claim 3, wherein: the rotating mechanism (5) comprises a motor frame (51) arranged on the frame (1), a motor (52) arranged on the motor frame (51), a synchronous pulley (53) arranged on the motor (52) and the rotating seat (32) and a synchronous belt (54) arranged on the synchronous pulley (53); the jacking mechanism (4) is also arranged on the frame (1).

5. The apparatus for controlling a vacuum centrifugal casting method of aluminum copper for a rotor of an induction motor according to claim 2, wherein: the jacking mechanism (4) comprises an air cylinder (41) arranged on the frame (1) and a jacking frame (42) fixedly connected with the air cylinder (41); a fixed seat (43) is arranged on the jacking frame (42), and a die clamping ejector rod (44) fixedly connected with the lower die fixed seat (37) is movably arranged in the fixed seat (43); and a bearing (33) is further arranged between the fixing seat (43) and the die clamping ejector rod (44).

6. The device for controlling the vacuum centrifugal casting of aluminum copper for the rotor of the induction motor according to claim 5, wherein: an inner core (45) is movably mounted in the die clamping ejector rod (44), a material returning rod (46) is mounted at one end of the inner core (45), a spring seat (47) is connected to the other end of the inner core, a spring (48) is mounted on the spring seat (47), and a bearing is mounted between the spring (48) and the fixed seat (43); and a hydraulic cylinder (49) for jacking the spring seat (47) is arranged on one side of the spring seat (47).

7. The device for controlling the vacuum centrifugal casting of aluminum copper for the rotor of the induction motor according to claim 4, wherein: an air suction channel (61) is arranged between the die assembly ejector rod (44) and the inner core (45), an air suction hole (62) communicated with the air suction channel (61) is arranged on the fixing seat (43), and the air suction hole (62) is connected with a vacuumizing mechanism (6) through a pipeline.

8. The device for controlling the vacuum centrifugal casting of aluminum copper for the rotor of the induction motor according to claim 5, wherein: the vacuumizing mechanism (6) comprises an energy storage barrel (63) connected with the air suction hole (62) through a pipeline and a vacuum pump (64) connected with the energy storage barrel (63) through a pipeline; and a vacuum degree detection meter (65) is arranged on the energy storage barrel (63).

9. The apparatus for controlling a vacuum centrifugal casting method of aluminum copper for a rotor of an induction motor according to claim 6, wherein: a filter (66) and an electronic air valve (67) are connected to a pipeline connected with the air suction hole (62) and the energy storage barrel (63), and a filter (66) is connected to a pipeline connected with the energy storage barrel (63) and the vacuum pump (64); and a time delay device is arranged on the electronic air valve (67).

10. The apparatus for controlling a vacuum centrifugal casting method of aluminum copper for a rotor of an induction motor according to claim 2, wherein: and the soup feeding manipulator is provided with an inductor for inducing the soup feeding manipulator to overturn, pour and reset.