New energy automobile asynchronous motor cast-aluminum rotor production line capable of automatically installing shaft

Abstract

The invention discloses a new energy automobile asynchronous motor cast-aluminum rotor production line capable of automatically installing a shaft. The new energy automobile asynchronous motor cast-aluminum rotor production line comprises a rotor iron core stamping area, a rotor iron core degreasing area, a rotor iron core aluminum casting area, a cast-aluminum rotor inner hole reaming area and a cast-aluminum rotor automatic shaft installing area which are sequentially arranged according to the production process of a cast-aluminum rotor. A cast-aluminum rotor feeding station, a shaft feeding station, a cast-aluminum rotor heating station, an automatic shaft mounting station and a shaft mounting manipulator are arranged on the cast-aluminum rotor automatic shaft mounting area, and the cast-aluminum rotor feeding station, the shaft feeding station, the cast-aluminum rotor heating station and the automatic shaft mounting station are arranged around the periphery of the shaft mounting manipulator in the circumferential direction at intervals; wherein a cast-aluminum rotor reaming device is arranged on the cast-aluminum rotor inner hole reaming area; the automatic shaft installing station is provided with an automatic shaft installing mechanism used for installing a rotating shaft in an inner hole of the cast-aluminum rotor. The production efficiency and the production quality of the cast-aluminum rotor are improved, and the labor production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motor core manufacturing equipment, and in particular to a cast aluminum rotor production line for asynchronous motors of new energy vehicles with automatic shaft assembly. Background Art

[0002] The rotor of asynchronous motor for new energy vehicles is a cast aluminum rotor formed by high-pressure aluminum casting of rotor core. The production process of cast aluminum rotor mainly includes stamping silicon steel sheets into core punching sheets through stamping progressive die and stacking them into rotor core, degreasing of rotor core, aluminum casting of rotor core, inner hole processing of cast aluminum rotor, assembly of cast aluminum rotor and shaft, dynamic balancing after assembly of cast aluminum rotor and shaft, etc. Its process is relatively complicated and has high quality control requirements. In addition, important key processes such as shaft assembly require manual operation, which leads to low production efficiency, high quality control difficulty and high labor production cost.

[0003] Therefore, it is necessary to solve the above problems through technical improvements to meet the needs of mass production of cast aluminum rotors. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a production line for casting aluminum rotors of asynchronous motors for new energy vehicles with automatic shaft assembly, aiming to improve the production efficiency and production quality of cast aluminum rotors and reduce labor production costs. The specific technical solutions are as follows: A cast aluminum rotor production line for asynchronous motors of new energy vehicles with automatic shaft assembly, comprising a rotor core stamping area, a rotor core degreasing area, a rotor core aluminum casting area, a cast aluminum rotor inner hole reaming area and a cast aluminum rotor automatic shaft assembly area which are arranged in sequence according to the production process of the cast aluminum rotor; wherein the cast aluminum rotor automatic shaft assembly area is provided with a cast aluminum rotor feeding station, a shaft feeding station, a cast aluminum rotor heating station, an automatic shaft assembly station and a shaft assembly manipulator, and the cast aluminum rotor feeding station, the shaft feeding station, the cast aluminum rotor heating station and the automatic shaft assembly station are arranged at intervals in the circumferential direction around the periphery of the shaft assembly manipulator; wherein the The rotor core stamping area is provided with a core stamping progressive die, the rotor core degreasing is provided with a core drying and degreasing device, the rotor core cast aluminum area is provided with a rotor core die-casting machine, and the cast aluminum rotor inner hole reaming area is provided with a cast aluminum rotor reaming device; wherein, the cast aluminum rotor feeding station is provided with a cast aluminum rotor storage warehouse for storing cast aluminum rotors, the shaft feeding station is provided with a shaft storage warehouse for storing shafts, the cast aluminum rotor heating station is provided with a core heating device, and the automatic shaft loading station is provided with an automatic shaft loading mechanism for installing the shaft into the inner hole of the cast aluminum rotor.

[0005] Preferably, the cast aluminum rotor production line for new energy vehicle asynchronous motor with automatic shaft loading of the present invention also includes a cast aluminum rotor cooling zone arranged after the cast aluminum rotor automatic shaft loading zone according to the production process of the cast aluminum rotor, and is used to cool the cast aluminum rotor after shaft loading, and the cast aluminum rotor cooling zone is provided with an air cooling device.

[0006] Preferably, the air cooling device of the cast aluminum rotor cooling zone is close to the shaft installing robot.

[0007] Preferably, a rotor conveyor line for transferring rotor cores or cast aluminum rotors is provided between the rotor core stamping area, the rotor core degreasing area, the rotor core cast aluminum area, the cast aluminum rotor inner hole reaming area, the cast aluminum rotor automatic shaft mounting area and the cast aluminum rotor cooling area, and a rotor transfer mechanism is provided between the rotor conveyor line and the rotor core stamping area, the rotor core degreasing area, the rotor core cast aluminum area, the cast aluminum rotor inner hole reaming area, the cast aluminum rotor automatic shaft mounting area and the cast aluminum rotor cooling area.

[0008] Preferably, the rotor transfer mechanism is a transfer robot.

[0009] In the present invention, the automatic shaft installation mechanism includes a press equipped with the shaft installation robot, and a rotor positioning mold arranged on the press workbench for positioning the cast aluminum rotor; the rotor positioning mold includes a vertical frame, a lifter arranged at the lower position of the vertical frame, a static pressure expansion mandrel for positioning the inner hole of the cast aluminum rotor, which is vertically arranged at the upper end of the lifter and passes upward to the upper position of the vertical frame, and a plurality of floating support cylinders for positioning the lower end surface of the cast aluminum rotor, which are arranged at the upper end of the vertical frame and located at the periphery of the static pressure expansion mandrel.

[0010] Preferably, the lifter is a servo electric cylinder, and the lower end of the static pressure expansion mandrel is fixed to a connecting flange at the top of the telescopic rod of the servo electric cylinder.

[0011] Preferably, the static pressure expansion mandrel is a liquid plastic static pressure expansion mandrel, which includes a mandrel body, an expansion sleeve sleeved on the outer circumference of the mandrel body through an interference fit, annular grooves respectively arranged at both ends of the inner hole of the expansion sleeve, a liquid plastic filling channel arranged inside the mandrel body and connected to the annular groove on the outer circumference of the mandrel body, a liquid plastic extrusion hole opened on the mandrel body and connected to the liquid plastic filling channel, and a liquid plastic top pressure cylinder fixed on the mandrel body and whose piston rod is inserted into the liquid plastic extrusion hole; a thin wall is formed between the bottom of the annular groove and the outer circumference of the expansion sleeve, and the annular groove, the liquid plastic filling channel and the liquid plastic extrusion hole are filled with liquid plastic.

[0012] Preferably, the liquid plastic filling channel is formed by drilling. The liquid plastic filling channel includes an axial liquid plastic filling channel formed by drilling and a transverse liquid plastic filling channel connecting the annular groove with the axial liquid plastic filling channel by drilling. The drilling hole of the axial liquid plastic filling channel is sealed by welding a sealing plate.

[0013] Preferably, the liquid plastic extrusion hole is a transverse liquid plastic extrusion hole formed by drilling, and the liquid plastic pressing cylinder is installed at the opening of the transverse liquid plastic extrusion hole, and the piston rod of the liquid plastic pressing cylinder is inserted into the transverse liquid plastic extrusion hole.

[0014] As a further improvement of the present invention, a center guide hole is also axially arranged at the center position of the upper end of the core shaft body, and a floating pin is arranged in the center guide hole through a spring float to elastically support the center hole at the lower end of the rotating shaft to achieve assembly centering when the rotating shaft is assembled.

[0015] Preferably, a fixed ejector pin for supporting the center hole at the upper end of the rotating shaft is installed on the upper end pressure head of the press; the floating ejector pin and the fixed ejector pin are coaxial with each other.

[0016] Preferably, a limiting groove is provided on one side of the floating ejector, and a limiting pin for limiting the up and down travel of the floating ejector is provided on the core shaft body, and the front end of the limiting pin enters into the limiting groove.

[0017] Preferably, the upper end surface of the core shaft body is provided with a sensor mounting hole, and a distance measuring sensor for dynamically monitoring the height position of the lower end surface of the upper rotating shaft when the rotating shaft is assembled is provided in the sensor mounting hole.

[0018] A wiring hole is provided inside the core shaft body, and a sensor signal line of the distance measuring sensor passes downward through the wiring hole and then is led out from the lower part of the core shaft body.

[0019] Preferably, a sensor mounting hole is provided on the upper end surface of the vertical frame, and a distance measuring sensor for detecting the height position of the lower end surface of the cast aluminum rotor is provided in the sensor mounting hole.

[0020] Preferably, a distance measuring sensor for detecting the height position of the top of the telescopic rod of the servo electric cylinder is arranged on the lower housing seat of the servo electric cylinder.

[0021] By respectively arranging distance measuring sensors on the upper end surface of the core shaft body, the upper end surface of the vertical frame and the lower housing seat of the servo electric cylinder, and coordinating with the lifting distance of the servo electric cylinder, the pressing depth of the rotating shaft into the inner hole of the cast aluminum rotor can be accurately controlled, thereby achieving precise axial assembly of the rotating shaft and the cast aluminum rotor.

[0022] Preferably, the distance measuring sensor is an infrared distance measuring sensor.

[0023] In the present invention, the shaft loading robot is provided with a shaft clamp for clamping the outer circle of the cast aluminum rotor and the outer circle of the rotating shaft; the shaft clamp includes a finger cylinder arranged at the front end of the shaft loading robot, a pair of clamping blocks respectively arranged on the finger cylinders and capable of clamping each other, and a pair of clamping fingers arranged on each clamping block, and the clamping fingers are provided with V-shaped grooves for positioning and clamping the outer circle of the cast aluminum rotor or the rotating shaft.

[0024] In the present invention, the core heating device is a magnetic induction rapid heating device.

[0025] In the present invention, the press, lifter, floating support cylinder, liquid plastic top pressure cylinder, shaft assembly manipulator and distance sensor are respectively connected to the control system, and the control system coordinates the actions of the press, lifter, floating support cylinder, liquid plastic top pressure cylinder and shaft assembly manipulator to achieve automatic assembly of the rotating shaft and the cast aluminum rotor. The specific main process of automatic shaft assembly is as follows: (1) Iron core heating: The shaft loading robot moves to the cast aluminum rotor storage, grabs the cast aluminum rotor in the cast aluminum rotor storage, and transfers it to the cast aluminum rotor heating station to achieve magnetic induction rapid heating of the cast aluminum rotor. (2) Positioning of cast aluminum rotor: After heating, the cast aluminum rotor is transferred by the shaft-loading robot to the press of the automatic shaft-loading station, and the cast aluminum rotor is inserted into the outer circle of the expansion sleeve of the static pressure expansion mandrel; after it is in place, the liquid plastic top pressure cylinder is turned on, so that the expansion sleeve of the static pressure expansion mandrel is squeezed by the internal liquid plastic and deformed outward, and the thin walls at the upper and lower positions of the expansion sleeve clamp the inner hole of the cast aluminum rotor to achieve self-centering. After it is in place, the floating support cylinder is turned on to float and support the lower end face of the cast aluminum rotor; the control system obtains the height position data of the lower end face of the cast aluminum rotor through the distance measuring sensor located on the upper end face of the vertical frame; (3) Shaft positioning: The shaft loading robot moves to the shaft storage, grabs the shaft from the shaft storage, and transfers it to the press at the automatic shaft loading station, and positions the center hole of the lower end of the shaft on the floating ejector at the upper end of the static pressure expansion mandrel to achieve the lower end center positioning of the shaft; after it is in place, the press is turned on, so that the upper end pressure head of the press moves downward a set distance, driving the fixed ejector installed on it to move downward synchronously until the fixed ejector presses against the upper end center hole of the shaft, achieving the upper end center positioning of the shaft; after it is in place, the shaft loading robot is released, and the control system obtains the height position data of the lower end surface of the shaft through the distance measuring sensor located on the end surface of the mandrel body of the static pressure expansion mandrel; (4) Assembly of the rotating shaft and the cast aluminum rotor: Loosen the liquid plastic top pressure cylinder to make the outer circle of the expansion sleeve of the static pressure expansion mandrel shrink and reset, so that a sliding fit is formed between the inner hole of the cast aluminum rotor and the outer circle of the expansion sleeve. Turn on the press to continue to move downward, and at the same time turn on the servo electric cylinder to move downward synchronously. The rotating shaft is gradually pressed into the inner hole of the cast aluminum rotor under the guidance of the fixed ejector at the top and the floating ejector at the bottom. The control system obtains the height position data of the lower end surface of the cast aluminum rotor and the static pressure expansion mandrel based on the distance sensor located on the upper end surface of the vertical frame. The height position data of the lower end face of the rotating shaft obtained by the distance sensor on the end face of the mandrel body of the expanding mandrel and the height position data of the top of the telescopic rod of the servo electric cylinder obtained by the distance sensor located on the lower housing seat of the servo electric cylinder are used to accurately control the pressing depth of the rotating shaft into the inner hole of the cast aluminum rotor through calculation; after reaching the position, the press is started to rise and reset to the original position, so that the upper fixed ejector is disengaged from the rotating shaft, and the servo electric cylinder is started to continue to move downward so that the lower floating ejector is disengaged from the rotating shaft; the assembly operation of the rotating shaft and the cast aluminum rotor is completed; (5) Servo electric cylinder reset: The shaft assembly robot removes the assembly of the cast aluminum rotor and the shaft and transfers it to the air cooling device in the cooling area of ​​the cast aluminum rotor for air cooling; at the same time, the servo electric cylinder resets and rises to the predetermined position to prepare for the next cast aluminum rotor shaft assembly operation.

[0026] Preferably, the automatic shaft-mounting cast aluminum rotor production line for new energy automobile asynchronous motors of the present invention further includes a dynamic balancing area and a cleaning area which are sequentially arranged after the cast aluminum rotor cooling area according to the production process of the cast aluminum rotor. A dynamic balancing machine is arranged on the dynamic balancing area, and a cyclone cleaning device is arranged on the cleaning area.

[0027] In the present invention, the cast aluminum rotor reaming device includes a base, a slide arranged on the base for movement along the left-right direction, a pair of columns arranged upright at the front and rear sides of the upper end surface of the slide, a bridge plate connected between the tops of the pair of columns, a push cylinder installed on the bridge plate with the piston rod facing downward, a pressure block arranged at the lower end of the piston rod of the push cylinder, a pair of cylindrical positioning rods parallel to the left-right direction are arranged at intervals on the upper end surface of the slide below the pressure block, a rotating shaft for installing a reamer is rotatably arranged at one side of the left-right direction of the base, and a linear actuator for driving the slide to move along the left-right direction is also arranged on the base.

[0028] In the present invention, the slide is movably arranged on a pair of cylindrical guide rails, both ends of the cylindrical guide rails are respectively connected with supports, and the supports are fixedly connected to the base.

[0029] Preferably, the linear actuator is a servo electric push rod.

[0030] Preferably, a pair of guide rods are vertically arranged upward on the upper end surface of the pressing block, and a pair of guide holes are correspondingly arranged on the bridge plate, and the pair of guide rods are correspondingly slidably arranged in the pair of guide holes.

[0031] By arranging the guide rod on the pressing block, the reliability of the parts pressing when the piston rod of the pressing cylinder has a long stroke is improved.

[0032] In the present invention, a reduction box is provided at one side of the base in the left-right direction, and the rotating shaft is the output shaft of the reduction box.

[0033] In the present invention, the reduction box is provided with a driving motor for driving the rotating shaft to rotate.

[0034] Preferably, a lifting and adjusting seat is provided on the slide, the pair of columns are vertically arranged on the lifting and adjusting seat on the slide, and the pair of cylindrical positioning rods are fixed on the lifting and adjusting seat.

[0035] Preferably, connecting plates are respectively connected between the two end portions of the pair of cylindrical positioning rods.

[0036] Preferably, a V-shaped groove for pressing the outer circle of the cast aluminum rotor is provided on the lower end surface of the pressing block.

[0037] Preferably, a bakelite inlay is provided on the lower end surface of the pressing block, and the V-shaped groove is provided on the bakelite inlay.

[0038] As a further improvement of the cast aluminum rotor reaming device in the present invention, a blower for cleaning the cast aluminum rotor after reaming is also provided at the other side position in the left and right directions of the base; the blower includes a purge seat fixed on the base, a purge pipe fixed on the purge seat and connected to the compressed air pipeline, a sealing plate is provided at the front end opening of the purge pipe, and a plurality of purge holes connected to the inner hole of the purge pipe are provided on a front end section of the outer circle of the purge pipe, so that a front end section of the outer circle of the purge pipe forms a purge head for purging the inner hole of the cast aluminum rotor; the purge pipe is coaxially arranged with the rotating shaft and is disposed on the left and right sides of the slide.

[0039] By setting the purge device, the inner hole of the part after reaming can be automatically purged and cleaned, and the cleaning efficiency is high and the cleaning quality is good.

[0040] Wherein, the outer diameter of the purge head is smaller than the inner diameter of the cast aluminum rotor.

[0041] Preferably, the purge holes are evenly spaced on a section of the outer circle at the front end of the purge pipe.

[0042] Wherein, the outer diameter of the purge head is smaller than the inner diameter of the cast aluminum rotor.

[0043] In the present invention, a push rod connecting block is provided at the lower end of the slide, and the front end of the telescopic rod of the servo electric push rod is fixed on the push rod connecting block.

[0044] As a further improvement of the present invention, a center height corrector for correcting the center height position of the inner hole of the cast aluminum rotor before reaming is also provided on the purge device, and the center height corrector includes an upper pipe joint seal-welded at the upper position of the inner wall of a front end section of the purge pipe, and a lower pipe joint seal-welded at the lower position of the inner wall of a front end section of the purge pipe. An upper airflow detection hole connected to the upper pipe joint is also provided at the upper position of the outer circle of the front end section of the purge pipe, and a lower airflow detection hole connected to the lower pipe joint is also provided at the lower position of the outer circle of the front end section of the purge pipe. The upper pipe joint and the lower pipe joint are respectively connected to an upper airflow conveying pipe and a lower airflow conveying pipe, and the upper airflow conveying pipe and the lower airflow conveying pipe are connected to the pneumatic measuring instrument through a three-way switching valve.

[0045] In the present invention, an electric control valve is provided on the compressed air pipeline.

[0046] In the present invention, the top pressure cylinder, the linear actuator (servo electric push rod), the drive motor, the electric control valve, the three-way switching valve and the pneumatic measuring instrument are automatically controlled by a controller.

[0047] The method of use of the present invention is as follows: (1) Workpiece installation: Position the outer circle of the cast aluminum rotor on a pair of cylindrical positioning rods, and then drive the top pressure cylinder to move so that the pressure block at the lower end of the piston rod of the top pressure cylinder presses and fixes the cast aluminum rotor; (2) Center height adjustment: Drive the linear actuator (servo electric push rod) to move the slide toward the side of the purge head, and the purge head enters the inner hole of the cast aluminum rotor; connect the compressed air pipeline, and spray compressed air through the purge hole on the purge head to pre-clean the inner hole of the cast aluminum rotor; after pre-cleaning, close the compressed air pipeline, and then connect the pneumatic meter to detect the air flow of the upper air flow detection hole and the lower air flow detection hole respectively by switching the three-way switching valve, and compare the air flow of the upper air flow detection hole and the lower air flow detection hole, and adjust the upper and lower height positions of the cast aluminum rotor by the lifting adjustment seat to make the air flow of the upper air flow detection hole and the lower air flow detection hole equal; (3) Reaming: Turn on the drive motor to drive the output shaft (rotating shaft) of the reduction gearbox to rotate together with the reamer; drive the linear actuator (servo electric push rod) to move the slide toward the side of the reamer, and the reamer enters the inner hole of the cast aluminum rotor to ream the hole; after reamed to the limit position, drive the linear actuator (servo electric push rod) to move the slide back to the middle initial position, the cast aluminum rotor is separated from the reamer, and the reaming operation is completed; (4) Cleaning: Drive the linear actuator (servo electric push rod) to move the slide toward the side of the purge head, and the purge head enters the inner hole of the cast aluminum rotor; connect the compressed air pipeline, and spray compressed air through the purge hole on the purge head to clean the inner hole of the cast aluminum rotor; after cleaning, drive the linear actuator (servo electric push rod) to move the slide back to the middle initial position, and the cleaning operation of the inner hole of the cast aluminum rotor is completed; (5) Removing the parts: Turn off the drive motor to stop the output shaft (rotating shaft) of the reduction gearbox and the reamer from rotating; drive the top pressure cylinder to move so that the piston rod of the top pressure cylinder retreats, and the pressure block at the lower end of the piston rod of the top pressure cylinder releases the cast aluminum rotor, and the operator removes the cast aluminum rotor; (6) Circular operation: Repeat steps (1) to (4) to complete the reaming operation of the next cast aluminum rotor.

[0048] In the step (2), during pre-cleaning, the linear actuator (servo electric push rod) is driven to move so that the slide table moves back and forth, thereby achieving reciprocating pre-cleaning; Preferably, during the cleaning in step (4), the linear actuator (servo electric push rod) drives the slide to make several reciprocating movements to further improve the cleaning effect of the inner hole of the cast aluminum rotor.

[0049] The beneficial effects of the present invention are: First, the present invention provides an automatic shaft-installing cast aluminum rotor production line for asynchronous motors of new energy vehicles. An automatic shaft-installing mechanism is provided on the automatic shaft-installing area of ​​the cast aluminum rotor, which can realize the automatic assembly of the cast aluminum rotor and the rotating shaft. It has a good degree of automation and high production efficiency, and saves labor production costs.

[0050] Second, the present invention provides an automatic shaft-loading production line for cast aluminum rotors of asynchronous motors for new energy vehicles. The positioning of the cast aluminum rotors in the automatic shaft-loading mechanism uses a static pressure expansion mandrel as the main positioning and a floating support cylinder as an adaptive positioning based on the main positioning. The positioning has good reliability and high precision.

[0051] Thirdly, the present invention provides a cast aluminum rotor production line for asynchronous motors of new energy vehicles with automatic shaft installation. The automatic shaft installation mechanism utilizes the advantage that the center holes at both ends of the rotating shaft are coaxial with the outer circle of the rotating shaft. During assembly, the upper fixed ejector pin and the lower floating ejector pin of the automatic shaft installation mechanism move downward synchronously, realizing high-precision dynamic guiding during assembly. It can effectively prevent the rotating shaft from getting stuck due to inaccurate positioning or displacement during the pressing process of the rotating shaft in conventional assembly operations, thereby improving the assembly quality of the cast aluminum rotor and the rotating shaft.

[0052] Fourthly, in the cast aluminum rotor production line of asynchronous motor for new energy vehicles with automatic shaft installation of the present invention, a cast aluminum rotor reaming device is arranged on the inner hole reaming area of ​​the cast aluminum rotor. During the reaming operation, the operator only needs to be responsible for the picking and placing of parts (cast aluminum rotor). In addition to the picking and placing of parts, the reaming operation can be completed automatically, thereby improving the efficiency of the reaming operation and reducing the labor intensity of the operator's reaming operation.

[0053] Fifth, the present invention provides an automatic shaft-loading cast aluminum rotor production line for asynchronous motors of new energy vehicles. The cast aluminum rotor reaming device can adapt to the clamping and positioning of cast aluminum rotors of different diameters by arranging a lifting and adjusting seat on the slide, and has good versatility. A pair of cylindrical positioning rods are used for positioning, which can achieve automatic centering and has good positioning accuracy.

[0054] Sixth, in the cast aluminum rotor production line of asynchronous motor for new energy vehicles with automatic shaft installation of the present invention, a center height adjuster is arranged on the blower of the cast aluminum rotor reaming device, which can detect whether the gap between the outer circle of the blower head and the inner hole of the cast aluminum rotor in the up and down directions is uniform, thereby realizing automatic and precise adjustment of the center height of the inner hole of the cast aluminum rotor under the control of the controller, compensating for the up and down offset error of the inner hole after positioning caused by the change of the tolerance of the outer diameter of the cast aluminum rotor, thereby ensuring that the reamer axis is consistent with the inner hole of the cast aluminum rotor, thereby further improving the quality of the cast aluminum rotor reaming. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the overall layout of a production line for casting aluminum rotors of asynchronous motors for new energy vehicles with automatic shaft assembly according to the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of the automatic shaft loading mechanism; Figure 3 yes Figure 2 A partial enlarged view of Figure 4 yes Figure 3 A partial enlarged view of Figure 5 yes Figure 2 The structural diagram of the finger cylinder in FIG. Figure 6 yes Figure 5 A top view of Figure 7 It is a structural schematic diagram of a cast aluminum rotor reaming device of the present invention; Figure 8 yes Figure 7 K-direction view; Fig. 9 yes Figure 7 A partial enlarged view of the part involving the purge head.

[0056] In the figure: 41, press, 42, press workbench, 43, rotor positioning mold, 44, vertical frame, 45, lifter (servo electric cylinder), 46, static pressure expansion mandrel, 47, floating support cylinder, 48, mandrel body, 49, expansion sleeve, 50, annular groove, 51, thin wall, 52, liquid plastic filling channel, 53, liquid plastic extrusion hole, 54, liquid plastic top pressure cylinder, 55, liquid plastic, 56, center guide hole, 57, spring, 58, rotating shaft, 59, center hole at the lower end of the rotating shaft, 60, floating ejector, 61, shaft clamp, 62, shaft installation manipulator, 63, distance sensor, 64, sensor signal line, 65, limit groove, 66, limit pin, 67, finger cylinder, 68, clamp block, 69, clamp finger, 70, V-groove, 71, fixed ejector.

[0057] In the figure: 1, base, 2, slide, 3, column, 4, bridge plate, 5, top pressure cylinder, 6, cylindrical guide rail, 7, pressure block, 8, cylindrical positioning rod, 9, reamer, 10, rotating shaft, 11, linear actuator (servo electric push rod), 12, guide rod, 13, support, 14, reduction box, 15, drive motor, 16, lifting adjustment seat, 17, connecting plate, 18, V-groove, 19, bakelite inlay, 20, purge, 21 , purge seat, 22, compressed air pipeline, 23, purge pipe, 24, purge head, 25, purge hole, 26, push rod connecting block, 27, cast aluminum rotor, 28, sealing plate, 29, center height corrector, 30, upper pipe joint, 31, lower pipe joint, 32, upper air flow detection hole, 33, lower air flow detection hole, 34, upper air flow delivery pipe, 35, lower air flow delivery pipe, 36, three-way switching valve, 37, pneumatic measuring instrument. DETAILED DESCRIPTION

[0058] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0059] like Figures 1 to 9The figure shows an embodiment of the cast aluminum rotor production line of an asynchronous motor for new energy vehicles with automatic shaft assembly of the present invention, comprising a rotor core stamping area, a rotor core degreasing area, a rotor core aluminum casting area, a cast aluminum rotor inner hole reaming area and a cast aluminum rotor automatic shaft assembly area which are arranged in sequence according to the production process of the cast aluminum rotor; wherein the cast aluminum rotor automatic shaft assembly area is provided with a cast aluminum rotor feeding station, a shaft feeding station, a cast aluminum rotor heating station, an automatic shaft assembly station and a shaft assembly manipulator 62, and the cast aluminum rotor feeding station, the shaft feeding station, the cast aluminum rotor heating station and the automatic shaft assembly station are arranged circumferentially at intervals around the periphery of the shaft assembly manipulator ; Wherein, a core stamping progressive die is provided on the rotor core stamping area, a core drying and degreasing device is provided on the rotor core degreasing, a rotor core die-casting machine is provided on the rotor core cast aluminum area, and a cast aluminum rotor reaming device is provided on the cast aluminum rotor inner hole reaming area; wherein, a cast aluminum rotor storage warehouse for storing cast aluminum rotors is provided on the cast aluminum rotor feeding station, a shaft storage warehouse for storing shafts is provided on the shaft feeding station, a core heating device is provided on the cast aluminum rotor heating station, and an automatic shaft loading mechanism for installing the shaft into the inner hole of the cast aluminum rotor is provided on the automatic shaft loading station.

[0060] Preferably, the cast aluminum rotor production line for new energy vehicle asynchronous motor with automatic shaft loading in this embodiment also includes a cast aluminum rotor cooling zone arranged after the cast aluminum rotor automatic shaft loading zone according to the production process of the cast aluminum rotor, and is used to cool the cast aluminum rotor after shaft loading, and the cast aluminum rotor cooling zone is provided with an air cooling device.

[0061] Preferably, the air cooling device of the cast aluminum rotor cooling zone is close to the shaft installing robot 62 .

[0062] Preferably, a rotor conveyor line for transferring rotor cores or cast aluminum rotors is provided between the rotor core stamping area, the rotor core degreasing area, the rotor core cast aluminum area, the cast aluminum rotor inner hole reaming area, the cast aluminum rotor automatic shaft mounting area and the cast aluminum rotor cooling area, and a rotor transfer mechanism is provided between the rotor conveyor line and the rotor core stamping area, the rotor core degreasing area, the rotor core cast aluminum area, the cast aluminum rotor inner hole reaming area, the cast aluminum rotor automatic shaft mounting area and the cast aluminum rotor cooling area.

[0063] Preferably, the rotor transfer mechanism is a transfer robot.

[0064] In this embodiment, the automatic shaft installation mechanism includes a press 41 that is matched with the shaft installation robot 62, and a rotor positioning mold 43 that is arranged on the press workbench 42 and is used to position the cast aluminum rotor 27; the rotor positioning mold 43 includes a vertical frame 44, a lifter 45 that is arranged at the lower position of the vertical frame 44, a static pressure expansion mandrel 46 that is vertically arranged at the upper end of the lifter 45 and passes upward to the upper position of the vertical frame 44 and is used to position the inner hole of the cast aluminum rotor 27, and a plurality of floating support cylinders 47 that are arranged at the upper end of the vertical frame 44 and located on the periphery of the static pressure expansion mandrel 46 and are used to position the lower end surface of the cast aluminum rotor 27.

[0065] Preferably, the lifter 45 is a servo electric cylinder, and the lower end of the static pressure expansion mandrel 46 is fixed to the connecting flange at the top of the telescopic rod of the servo electric cylinder.

[0066] Preferably, the static pressure expansion mandrel 46 is a liquid plastic static pressure expansion mandrel, which includes a mandrel body 48, an expansion sleeve 49 sleeved on the outer circle of the mandrel body 48 through an interference fit, annular grooves 50 respectively arranged at both ends of the inner hole of the expansion sleeve 49, a liquid plastic filling channel 52 arranged inside the mandrel body 48 and connected to the annular groove 50 on the outer circle of the mandrel body 48, a liquid plastic extrusion hole 53 opened on the mandrel body 48 and connected to the liquid plastic filling channel 52, and a liquid plastic top pressure cylinder 54 fixed on the mandrel body 48 and its piston rod inserted into the liquid plastic extrusion hole 53; a thin wall is formed between the bottom of the annular groove 50 and the outer circle of the expansion sleeve 49, and the annular groove 50, the liquid plastic filling channel 52 and the liquid plastic extrusion hole 53 are filled with liquid plastic 55.

[0067] Preferably, the liquid plastic filling channel 52 is formed by drilling. The liquid plastic filling channel 52 includes an axial liquid plastic filling channel formed by drilling and a transverse liquid plastic filling channel connecting the annular groove 50 with the axial liquid plastic filling channel by drilling. The drilling hole of the axial liquid plastic filling channel is sealed by welding a sealing plate.

[0068] Preferably, the liquid plastic extrusion hole 53 is a transverse liquid plastic extrusion hole formed by drilling, and the liquid plastic pressing cylinder 54 is installed at the opening of the transverse liquid plastic extrusion hole, and the piston rod of the liquid plastic pressing cylinder 54 is inserted into the transverse liquid plastic extrusion hole.

[0069] As a further improvement of the present embodiment, a center guide hole 56 is axially arranged at the center position of the upper end of the core shaft body 48, and a floating ejector pin 60 is floatingly arranged in the center guide hole 56 through a spring 57 for elastically supporting the center hole 59 at the lower end of the rotating shaft when the rotating shaft 58 is assembled to achieve assembly centering.

[0070] Preferably, a fixed ejector pin 71 for supporting the center hole at the upper end of the rotating shaft 58 is installed on the upper pressure head of the press 41 ; the floating ejector pin 60 and the fixed ejector pin 71 are coaxial with each other.

[0071] Preferably, a limiting groove 65 is provided on one side of the floating ejector 60 , and a limiting pin 66 for limiting the up and down travel of the floating ejector 60 is provided on the core shaft body 48 , and the front end of the limiting pin 66 enters into the limiting groove 65 .

[0072] Preferably, a sensor mounting hole is provided on the upper end surface of the core shaft body 48, and a distance measuring sensor 63 is provided in the sensor mounting hole for dynamically monitoring the height position of the lower end surface of the upper rotating shaft 58 when the rotating shaft 58 is assembled.

[0073] A wiring hole is provided inside the core shaft body 48 , and a sensor signal line 64 of the distance measuring sensor 63 passes downward through the wiring hole and then is led out from the lower part of the core shaft body 48 .

[0074] Preferably, a sensor mounting hole is provided on the upper end surface of the vertical frame 44 , and a distance measuring sensor 63 for detecting the height position of the lower end surface of the cast aluminum rotor 27 is provided in the sensor mounting hole.

[0075] Preferably, a distance measuring sensor 63 for detecting the height position of the top of the telescopic rod of the servo electric cylinder is provided on the lower housing seat of the servo electric cylinder 45 .

[0076] By respectively arranging distance measuring sensors 63 on the upper end surface of the core shaft body 48, the upper end surface of the vertical frame 44 and the lower shell seat of the servo electric cylinder 45, and coordinating with the lifting distance of the servo electric cylinder, the pressing depth of the rotating shaft 58 into the inner hole of the cast aluminum rotor 27 can be accurately controlled, thereby achieving precise axial assembly of the rotating shaft 58 and the cast aluminum rotor 27.

[0077] Preferably, the distance measuring sensor 63 is an infrared distance measuring sensor.

[0078] In this embodiment, the shaft installing robot 62 is provided with a shaft clamp 61 for clamping the outer circumference of the cast aluminum rotor 27 and the outer circumference of the rotating shaft 58; the shaft clamp 61 includes a finger cylinder 67 arranged at the front end of the shaft installing robot 62, a pair of clamping blocks 68 respectively arranged on the finger cylinder 67 and capable of clamping each other, and a pair of clamping fingers 69 arranged on each clamping block 68, and the clamping fingers 69 are provided with V-shaped grooves 70 for positioning and clamping the outer circumference of the cast aluminum rotor 27 or the rotating shaft 58.

[0079] In this embodiment, the core heating device is a magnetic induction rapid heating device.

[0080] In this embodiment, the press 41, the lifter 45, the floating support cylinder 47, the liquid plastic top pressure cylinder 54, the shaft assembly manipulator 62 and the distance sensor 63 are respectively connected to the control system, and the control system coordinates the actions of the press 41, the lifter 45, the floating support cylinder 47, the liquid plastic top pressure cylinder 54 and the shaft assembly manipulator 62 to achieve automatic assembly of the rotating shaft 58 and the cast aluminum rotor 27. The specific main process of automatic shaft assembly is as follows: (1) Iron core heating: The shaft loading robot 62 moves to the cast aluminum rotor storage, grabs the cast aluminum rotor in the cast aluminum rotor storage, and transfers it to the cast aluminum rotor heating station to achieve magnetic induction rapid heating of the cast aluminum rotor 27. (2) Positioning of cast aluminum rotor: After heating, the cast aluminum rotor 27 is transferred by the shaft-loading manipulator 62 to the press 41 of the automatic shaft-loading station, and the cast aluminum rotor 27 is inserted into the outer circle of the expansion sleeve 49 of the static pressure expansion mandrel 46; after it is in place, the liquid plastic pressing cylinder 54 is turned on, so that the expansion sleeve 49 of the static pressure expansion mandrel 46 is squeezed by the internal liquid plastic and deformed outward, and the thin walls 51 located at the upper and lower positions of the expansion sleeve 49 clamp the inner hole of the cast aluminum rotor 27 to achieve self-centering. After it is in place, the floating support cylinder 47 is turned on to float and support the lower end surface of the cast aluminum rotor 27; the control system obtains the height position data of the lower end surface of the cast aluminum rotor 27 through the distance measuring sensor 63 located on the upper end surface of the vertical frame 44; (3) Positioning of the rotating shaft: the shaft loading robot 62 moves to the rotating shaft storage, grabs the rotating shaft 58 on the rotating shaft storage, and transfers it to the press 41 of the automatic shaft loading station, and positions the center hole 59 of the lower end of the rotating shaft on the floating ejector 60 at the upper end of the static pressure expansion mandrel 46, so as to realize the positioning of the lower end center of the rotating shaft; after reaching the position, the press 41 is turned on, so that the upper end pressure head of the press 41 moves downward for a set distance, driving the fixed ejector 71 installed thereon to move downward synchronously until the fixed ejector 71 presses against the upper end center hole of the rotating shaft 58, so as to realize the positioning of the upper end center of the rotating shaft 58; after reaching the position, the shaft loading robot 62 is released, and the control system obtains the height position data of the lower end surface of the rotating shaft 58 through the distance measuring sensor 63 located on the end surface of the mandrel body 48 of the static pressure expansion mandrel 46; (4) Assembly of the rotating shaft and the cast aluminum rotor: Loosen the liquid plastic top pressure cylinder 54 to allow the outer circle of the expansion sleeve 49 of the static pressure expansion mandrel 46 to shrink and reset, thereby forming a sliding fit between the inner hole of the cast aluminum rotor 27 and the outer circle of the expansion sleeve 49. Turn on the press 41 to continue to move downward, and at the same time turn on the servo electric cylinder 45 to move downward synchronously. The rotating shaft 58 is gradually pressed into the inner hole of the cast aluminum rotor 27 under the guidance of the upper fixed ejector pin 71 and the lower floating ejector pin 60. The control system obtains the height position data of the lower end surface of the cast aluminum rotor 27 and the height position data of the static pressure expansion mandrel 46 according to the distance sensor 63 located on the upper end surface of the vertical frame 44. The height position data of the lower end face of the rotating shaft 58 obtained by the distance sensor 53 on the end face of the core shaft body 48 of the servo electric cylinder 46 and the height position data of the top of the telescopic rod of the servo electric cylinder 45 obtained by the distance sensor 63 located on the lower shell seat of the servo electric cylinder 45 are used to accurately control the pressing depth of the rotating shaft 58 into the inner hole of the cast aluminum rotor 27 through calculation; after reaching the position, the press machine 41 is turned on to rise and reset to the original position, so that the upper fixed ejector pin 71 is disengaged from the rotating shaft 58, and the servo electric cylinder 45 is turned on to continue to move downward so that the lower floating ejector pin 60 is disengaged from the rotating shaft 58; the assembly operation of the rotating shaft 58 and the cast aluminum rotor 27 is completed; (5) Servo electric cylinder reset: The shaft assembly robot 62 removes the assembly of the cast aluminum rotor 27 and the rotating shaft 58 and transfers it to the air cooling device in the cooling area of ​​the cast aluminum rotor for air cooling; at the same time, the servo electric cylinder 45 resets and rises to the predetermined position to prepare for the next assembly operation of the rotating shaft 58 of the cast aluminum rotor 27.

[0081] Preferably, the automatic shaft-mounting cast aluminum rotor production line for asynchronous motors of new energy vehicles of this embodiment further includes a dynamic balancing area and a cleaning area which are sequentially arranged after the cast aluminum rotor cooling area according to the production process of the cast aluminum rotor. A dynamic balancing machine is arranged on the dynamic balancing area, and a cyclone cleaning device is arranged on the cleaning area.

[0082] In this embodiment, the cast aluminum rotor reaming device includes a base 1, a slide 2 movably arranged on the base 1 along the left-right direction, a pair of columns 3 uprightly arranged at the front and rear sides of the upper end surface of the slide 2, a bridge plate 4 connected between the tops of the pair of columns 3, a top-pressing cylinder 5 installed on the bridge plate 3 with the piston rod facing downward, a pressure block 7 arranged at the lower end of the piston rod of the top-pressing cylinder 5, a pair of cylindrical positioning rods 8 parallel to the left-right direction are arranged at intervals below the pressure block 7 on the upper end surface of the slide 2, a rotating shaft 10 for installing a reamer 9 is rotatably arranged at one side of the left-right direction of the base 1, and a linear actuator 11 for driving the slide 2 to move along the left-right direction is also arranged on the base 1.

[0083] In this embodiment, the slide 2 is movably disposed on a pair of cylindrical guide rails 6 , and two ends of the cylindrical guide rails 6 are respectively connected to supports 13 , and the supports 13 are fixedly connected to the base 1 .

[0084] Preferably, the linear actuator 11 is a servo electric push rod.

[0085] Preferably, a pair of guide rods 12 are vertically arranged upward on the upper end surface of the pressing block 7, and a pair of guide holes are correspondingly arranged on the bridge plate 4, and the pair of guide rods 12 are correspondingly slidably arranged in the pair of guide holes.

[0086] By arranging the guide rod 12 on the pressing block 7, the reliability of the parts pressing when the piston rod of the pressing cylinder 5 has a long stroke is improved.

[0087] In this embodiment, a reduction box 14 is disposed on one side of the base 1 in the left-right direction, and the rotating shaft 10 is an output shaft of the reduction box 14 .

[0088] In this embodiment, the reduction box 14 is provided with a driving motor 15 for driving the rotating shaft 10 to rotate.

[0089] Preferably, a lifting adjustment seat 16 is provided on the slide 2 , the pair of uprights 3 are vertically arranged on the lifting adjustment seat 16 on the slide 2 , and the pair of cylindrical positioning rods 8 are fixed on the lifting adjustment seat 16 .

[0090] Preferably, connecting plates 17 are respectively connected between the two end portions of the pair of cylindrical positioning rods 8 .

[0091] Preferably, a V-shaped groove 18 for pressing the outer circumference of the cast aluminum rotor 27 is provided on the lower end surface of the pressing block 7 .

[0092] Preferably, a bakelite inlay 19 is provided on the lower end surface of the pressing block 7 , and the V-shaped groove 18 is provided on the bakelite inlay 19 .

[0093] As a further improvement of the cast aluminum rotor reaming device in this embodiment, a blower 20 for cleaning the cast aluminum rotor 27 after reaming is further provided at the other side position in the left and right directions of the base 1; the blower 20 includes a blow seat 21 fixed on the base 1, a blow pipe 23 fixed on the blow seat 21 and connected to the compressed air pipeline 22, a sealing plate 28 is provided at the front end opening of the blow pipe 23, and a plurality of blow holes 25 connected to the inner hole of the blow pipe 23 are provided on a front end section of the outer circle of the blow pipe 23, so that a front end section of the outer circle of the blow pipe forms a blow head 24 for purging the inner hole of the cast aluminum rotor; the blow pipe 23 is coaxially arranged with the rotating shaft 10 and is disposed on the left and right sides of the slide 2.

[0094] By providing the purge device 20, the inner hole of the part after reaming can be automatically purged and cleaned, and the cleaning efficiency is high and the cleaning quality is good.

[0095] The outer diameter of the purge head 24 is smaller than the inner diameter of the cast aluminum rotor 27 .

[0096] Preferably, the purge holes 25 are evenly spaced on a front end section of the outer circle of the purge pipe 23 .

[0097] In this embodiment, a push rod connecting block 26 is provided at the lower end of the slide 2 , and the front end of the telescopic rod of the servo electric push rod is fixed on the push rod connecting block 26 .

[0098] In this embodiment, an electric control valve (not shown in the figure) is provided on the compressed air pipeline 22.

[0099] As a further improvement of this embodiment, a center height corrector 29 for correcting the center height position of the inner hole of the cast aluminum rotor 27 before reaming is also provided on the purge device 20, and the center height corrector 29 includes an upper pipe joint 30 sealed and welded at the upper position of the inner wall of the front end section of the purge pipe 23, and a lower pipe joint 31 sealed and welded at the lower position of the inner wall of the front end section of the purge pipe 23. An upper airflow detection hole 32 connected to the upper pipe joint 30 is also provided at the upper position of the outer circle of the front end section of the purge pipe 23, and a lower airflow detection hole 33 connected to the lower pipe joint 31 is also provided at the lower position of the outer circle of the front end section of the purge pipe 23. The upper pipe joint 30 and the lower pipe joint 31 are respectively connected to an upper airflow conveying pipe 34 and a lower airflow conveying pipe 35, and the upper airflow conveying pipe 34 and the lower airflow conveying pipe 35 are connected to a pneumatic measuring instrument 37 through a three-way switching valve 36.

[0100] In this embodiment, the push cylinder 5, the linear actuator (servo electric push rod) 11, the drive motor 15, the electric control valve, the three-way switching valve 36 and the pneumatic measuring instrument 37 are automatically controlled by the controller.

[0101] The method of using this embodiment is as follows: (1) Workpiece installation: Position the outer circle of the cast aluminum rotor 27 on a pair of cylindrical positioning rods 8, and then drive the top pressure cylinder 5 to operate so that the pressure block 7 at the lower end of the piston rod of the top pressure cylinder 5 presses and fixes the cast aluminum rotor 27; (2) Center height adjustment: drive the linear actuator (servo electric push rod) 11 to move the slide 2 toward the side of the purge head 24, and the purge head 24 enters the inner hole of the cast aluminum rotor 27; connect the compressed air pipeline 22, and spray compressed air through the purge hole 25 on the purge head 24 to pre-clean the inner hole of the cast aluminum rotor 27; after pre-cleaning, close the compressed air pipeline 22, and then connect the pneumatic meter 37, and detect the air flow of the upper air flow detection hole 33 and the lower air flow detection hole 34 respectively by switching the three-way switching valve 36, and compare the air flow of the upper air flow detection hole 33 with that of the lower air flow detection hole 33, and adjust the upper and lower height positions of the cast aluminum rotor 27 by the lifting adjustment seat 16, so that the air flow of the upper air flow detection hole 32 and the lower air flow detection hole 33 are equal; (3) Reaming: Turn on the drive motor 15 to drive the output shaft of the reduction gearbox (rotating shaft 10) to rotate together with the reamer 9; drive the linear actuator (servo electric push rod) 11 to move the slide 2 to the side of the reamer 9, and the reamer 9 enters the inner hole of the cast aluminum rotor 27 to ream the hole; after reamed to the limit position, drive the linear actuator (servo electric push rod) 11 to move the slide 2 back to the middle initial position, the cast aluminum rotor 27 is separated from the reamer 9, and the reaming operation is completed; (4) Cleaning: Drive the linear actuator (servo electric push rod) 11 to move the slide 2 toward the side of the purge head 24, and the purge head 24 enters the inner hole of the cast aluminum rotor 27; connect the compressed air pipeline 22, and spray compressed air through the purge hole 25 on the purge head 24 to clean the inner hole of the cast aluminum rotor 27; after cleaning, drive the linear actuator (servo electric push rod) 11 to move the slide 2 back to the middle initial position, and the cleaning operation of the inner hole of the cast aluminum rotor 27 is completed; (5) Removing the parts: Turn off the driving motor 15, so that the output shaft of the reduction gearbox (rotating shaft 10) and the reamer 9 stop rotating; drive the top pressure cylinder 5 to move, so that the piston rod of the top pressure cylinder 5 retreats, and the pressing block 7 at the lower end of the piston rod of the top pressure cylinder 5 releases the cast aluminum rotor iron 27 core, and the operator removes the cast aluminum rotor 27; (6) Circular operation: Repeat steps (1) to (4) to complete the reaming operation of the next cast aluminum rotor 27.

[0102] Preferably, in step (2), during pre-cleaning, the linear actuator (servo electric push rod) 11 is driven to move so that the slide 2 moves back and forth to achieve reciprocating pre-cleaning; Preferably, during the cleaning in step (4), the linear actuator (servo electric push rod) 11 drives the slide 2 to make several reciprocating movements to further improve the cleaning effect of the inner hole of the cast aluminum rotor 27.

[0103] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A production line for casting aluminum rotors of asynchronous motors for new energy vehicles with automatic shaft assembly, characterized in that: The invention comprises a rotor core stamping area, a rotor core degreasing area, a rotor core cast aluminum area, a cast aluminum rotor inner hole reaming area and a cast aluminum rotor automatic shaft assembly area which are arranged in sequence according to the production process of the cast aluminum rotor; wherein the cast aluminum rotor automatic shaft assembly area is provided with a cast aluminum rotor feeding station, a shaft feeding station, a cast aluminum rotor heating station, an automatic shaft assembly station and a shaft assembly manipulator, and the cast aluminum rotor feeding station, the shaft feeding station, the cast aluminum rotor heating station and the automatic shaft assembly station are arranged at intervals in the circumferential direction around the periphery of the shaft assembly manipulator; wherein the rotor core stamping area is provided with a cast aluminum rotor feeding station, a shaft feeding station, a cast aluminum rotor heating station and an automatic shaft assembly station The core stamping progressive die is provided on the rotor core degreasing device, the rotor core casting area is provided with a rotor core die-casting machine, and the cast aluminum rotor inner hole reaming area is provided with a cast aluminum rotor reaming device; wherein, the cast aluminum rotor feeding station is provided with a cast aluminum rotor storage warehouse for storing cast aluminum rotors, the shaft feeding station is provided with a shaft storage warehouse for storing shafts, the cast aluminum rotor heating station is provided with an iron core heating device, and the automatic shaft loading station is provided with an automatic shaft loading mechanism for installing the shaft into the inner hole of the cast aluminum rotor.

2. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 1 is characterized in that: It also includes a cast aluminum rotor cooling zone which is arranged after the cast aluminum rotor automatic shaft assembly zone according to the production process of the cast aluminum rotor and is used to cool the cast aluminum rotor after the shaft assembly. The cast aluminum rotor cooling zone is provided with an air cooling device.

3. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 1 is characterized in that: The automatic shaft installation mechanism includes a press equipped with the shaft installation robot, and a rotor positioning mold arranged on the press workbench for positioning the cast aluminum rotor; the rotor positioning mold includes a vertical frame, a lifter arranged at the lower position of the vertical frame, a static pressure expansion core shaft vertically arranged at the upper end of the lifter and passing upward to the upper position of the vertical frame for positioning the inner hole of the cast aluminum rotor, and a plurality of floating support cylinders arranged at the upper end of the vertical frame and located at the periphery of the static pressure expansion core shaft for positioning the lower end surface of the cast aluminum rotor.

4. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 3 is characterized in that: The static pressure expansion mandrel is a liquid plastic static pressure expansion mandrel, which includes a mandrel body, an expansion sleeve sleeved on the outer circumference of the mandrel body through an interference fit, annular grooves respectively arranged at both ends of the inner hole of the expansion sleeve, a liquid plastic filling channel arranged inside the mandrel body and connected to the annular groove on the outer circumference of the mandrel body, a liquid plastic extrusion hole opened on the mandrel body and connected to the liquid plastic filling channel, and a liquid plastic top pressure cylinder fixed on the mandrel body and whose piston rod is inserted into the liquid plastic extrusion hole; a thin wall is formed between the bottom of the annular groove and the outer circumference of the expansion sleeve, and the annular groove, the liquid plastic filling channel and the liquid plastic extrusion hole are filled with liquid plastic.

5. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 4 is characterized in that: A center guide hole is also axially arranged at the center position of the upper end of the core shaft body. A floating ejector pin is arranged in the center guide hole through a spring float to elastically support the center hole at the lower end of the rotating shaft when the rotating shaft is assembled to achieve assembly centering.

6. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 1 is characterized in that: The shaft loading robot is provided with a shaft clamp for clamping the outer circle of the cast aluminum rotor and the outer circle of the rotating shaft; the shaft clamp includes a finger cylinder arranged at the front end of the shaft loading robot, a pair of clamping blocks respectively arranged on the finger cylinders and capable of clamping each other, and a pair of clamping fingers arranged on each clamping block, and the clamping fingers are provided with V-shaped grooves for positioning and clamping the outer circle of the cast aluminum rotor or the rotating shaft.

7. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 1 is characterized in that: The upper end surface of the core shaft body is provided with a sensor installation hole, and a distance measuring sensor for dynamically monitoring the height position of the lower end surface of the upper rotating shaft when the rotating shaft is assembled is arranged in the sensor installation hole.

8. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 1 is characterized in that: It also includes a dynamic balancing area and a cleaning area which are sequentially arranged after the cast aluminum rotor cooling area according to the production process of the cast aluminum rotor.

9. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 1 is characterized in that: The cast aluminum rotor reaming device includes a base, a slide arranged on the base for movement along the left-right direction, a pair of columns arranged upright at the front and rear sides of the upper end surface of the slide, a bridge plate connected between the tops of the pair of columns, a pressing cylinder installed on the bridge plate with the piston rod facing downward, a pressure block arranged at the lower end of the piston rod of the pressing cylinder, a pair of cylindrical positioning rods parallel to the left-right direction are arranged at intervals below the pressure block on the upper end surface of the slide, a rotating shaft for mounting a reamer is rotatably arranged at one side of the left-right direction of the base, and a linear actuator for driving the slide to move along the left-right direction is also arranged on the base.

10. The automatic shaft-loading aluminum cast rotor production line for asynchronous motors of new energy vehicles according to claim 1 is characterized in that: A blower for cleaning the cast aluminum rotor after reaming is also provided on the other side of the base in the left and right directions; the blower includes a blow seat fixed on the base, a blow pipe fixed on the blow seat and connected to the compressed air pipeline, a sealing plate is provided at the front end opening of the blow pipe, and a plurality of blow holes connected to the inner hole of the blow pipe are provided on a front end outer circle of the blow pipe, so that a front end outer circle of the blow pipe forms a blow head for blowing the inner hole of the cast aluminum rotor; the blow pipe is coaxially arranged with the rotating shaft and is disposed on the left and right sides of the slide.

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