CN114189114B - Manufacturing process of iron core of motor for new energy automobile - Google Patents

Abstract

The invention discloses a manufacturing process of an iron core of a motor for a new energy automobile, wherein a material belt is arranged between an upper die and a lower die of a continuous blanking die and is blanked continuously to form a motor rotor iron core and a motor stator iron core with a positioning groove, so that the blanking forming efficiency is high, the motor iron core with the positioning groove and a special-shaped structure rotates after the iron core is formed, the concentricity between the iron cores of the formed motor iron core is better, the dynamic balance during working is better, the formed motor iron core is small in size, the light weight is realized, and the performance requirements to be met by the motor stator iron core are met.

Description

A kind of iron core manufacturing process of electric motor for new energy vehicles

technical field

The invention relates to the technical field of a manufacturing process of a motor iron core for a new energy vehicle, in particular to a manufacturing process of an iron core of a motor for a new energy vehicle.

Background technique

At present, new energy vehicles have been vigorously promoted and further popularized, especially electric vehicles. For the drive motor of new energy vehicles, the stator iron core and rotor iron core are the heart of the motor, and their manufacturing has always been popular among people. focus on. At present, for the manufacturing process of the special-shaped motor stator iron core with positioning groove, only simple punching is used to make the iron cores stacked and connected to each other to form the iron core, but this manufacturing method makes the concentricity between the iron cores relatively low Therefore, in view of the above-mentioned defects, the inventor finally produced the manufacturing process of the present invention.

SUMMARY OF THE INVENTION

The purpose of the present invention is to design an iron core manufacturing process for a motor for new energy vehicles in order to solve the deficiencies of the above technologies, the details of which are as follows.

The iron core manufacturing process of a new energy vehicle motor designed by the present invention includes the following steps:

In step S1, the material belt is conveyed between the upper and lower molds of the continuous blanking die in the direction of blanking in a continuous step-by-step manner, and the rotor iron core sheet forming area of the material belt is punched to form the rotor iron core sheet. , and the blanking holes reserved on the material belt, the shape gap forming holes and a plurality of through holes arranged in an annular array, the plurality of through holes are arranged around the blanking holes, and the shape of the three annular arrays arranged on the material belt is formed Each area is punched and formed with contour notch forming holes to form a first pre-forming area with three contour notch forming holes, or two of the three contour forming areas arranged in an annular array on the material strip are punched and formed respectively. a profile notch forming hole to form a second preformed area having two profile notch forming holes;

Step S2, during the continuous step-by-step conveying of the material belt, a plurality of stator grooves arranged in an annular array are punched and formed around the blanking hole area on the material belt, and the stator grooves are formed in the first pre-forming area or the first pre-forming area. Two pre-forming areas, and enter step S3;

Step S3, in the process of continuous step-by-step conveying of the material belt, the inner hole of the stator is punched and formed on the basis of the center of the blanking hole in the first pre-forming area or the second pre-forming area, so that the groove shape of the stator and the inner hole of the stator are formed. The holes are connected, and at the same time, after a plurality of stator buckle points are punched and formed on the periphery of the stator slot, enter step S4;

Step S4, in the process of continuous step-by-step conveying of the material belt, in the first pre-forming area or the second pre-forming area, the through holes arranged in a plurality of annular arrays are used as the punching boundary of the stator iron core, and the punching die of the continuous punching die is used. The edge of the forming punch corresponds to the punching boundary of the stator iron sheet, and the stator iron sheet is punched and formed, and then enters the blanking die; a preset number of stator iron sheets are fixed through the stator buckle points to form The stator iron core of the motor; the stator iron core formed on the first pre-forming area does not have a lug, and the stator iron core formed on the second pre-forming area is punched to form a lug when the contour is not formed in the contour forming area. ;

Step S5, in the process of continuous step-by-step conveying of the material belt, after the formed first pre-forming area is punched and formed two times in a row, the stator iron core without the tabs is formed, and then the formed second pre-forming area is punched and formed. The upper punching and forming the stator iron core sheet with a convex piece, and after each forming a stator iron core piece, the blanking die is rotated 120°, so that the formed motor stator core is separated by two convex pieces without convexity. The stator iron core of the sheet is formed into a positioning slot, and the positions of the protruding pieces on the stator iron core of the motor correspond to each other.

Preferably, in step S1, the steps of continuous forming of the rotor core are as follows:

Step S11 , in the process of continuous step-by-step conveying of the material belt, a plurality of guide holes, two first forming holes and one second forming hole for forming the slot-shaped notch are punched and formed in the forming area of the rotor iron core. , the distance between the center point of the second forming hole and the center point of the rotor iron core forming area is a straight line, and the distance between the center points of the two first forming holes and the center point of the rotor iron core forming area is an oblique line , the angle between the straight line and the two oblique lines is 144°, and the angle between the two oblique lines is 72°, at this time, enter step S12;

Step S12, in the process of continuous step-by-step conveying of the material belt, according to the center point of the rotor iron core forming area as the center, ten ventilation holes arranged in an annular array are formed by punching, and a part of the two first forming holes are respectively connected with a The two ventilation holes on the side overlap to form a groove-shaped notch, and a part of a second molding hole overlaps with a ventilation hole on the other side to form a groove-shaped notch, and at this time, step S13 is entered;

Step S13, during the continuous step-by-step conveying of the material belt, according to the center point of the rotor core forming area as the center, punching is performed to form five first magnetic steel grooves arranged in an annular array and a plurality of through holes arranged in an annular array. , a plurality of rotor buckle points, and three profile notch forming holes or two profile notch forming holes, the first magnetic steel slot is located on the side of the outer inner wall of the ventilation hole, and the through hole is set away from the first magnetic steel slot, and the step is entered at this time. S14;

Step S14, in the process of continuous step-by-step conveying of the material belt, according to the center point of the rotor iron core forming area as the center, punching and forming five second magnetic steel grooves and rotor shaft holes arranged in an annular array, every two second magnetic steel grooves and rotor shaft holes are formed. There is a second magnetic steel groove between a magnetic steel groove, and then enter step S15;

Step S15, in the process of continuous step-by-step conveying of the material belt, the first magnetic steel slot and the second magnetic steel slot are used as the punching boundary of the rotor iron core, and the edge of the forming punch of the continuous punching die and the rotor core are punched out. Corresponding to the boundary, the rotor iron core is formed by punching, and enters the blanking die, and enters a preset number of multiple rotor iron cores to be fixed by the rotor buckle points to form the motor rotor core. There are still many through holes and blanking holes.

Preferably, between step S12 and step S13, there is also a step of punching a first through-sheet hole, and a plurality of first through-sheet holes corresponding to the position of each rotor buckle point are punched and formed on the side of the ventilation hole, so that the forming The rotor iron sheet has a first through sheet hole, and the first through sheet hole on the rotor iron sheet cannot form a fixed connection with the rotor buckle point of the motor rotor iron core in the blanking die.

Preferably, a second through-sheet hole punching step is further included between step S2 and step S3, and a plurality of second through-sheet holes corresponding to the positions of each stator buckle point are punched and formed on the side of the stator slot, respectively, The formed stator iron core has a second through-piece hole, and the second through-piece hole on the stator iron core cannot form a fixed connection with the stator buckle point of the motor stator core in the blanking die.

Preferably, a continuous step-by-step punching station is formed between the upper die and the lower die of the continuous punching die, and the continuous step-by-step punching station sequentially includes a punching guide hole from the feeding to the blanking direction. and the first punching station for punching holes, the second punching station for punching ventilation holes, the third punching station for punching the first through-piece holes, and the first punching station for punching the first magnetic steel The fourth punching station for grooves, rotor buckle points and through holes, the fifth punching station for punching the second magnetic steel slot, the rotor shaft hole and the hole for forming the shape gap, for punching out the rotor iron core The sixth blanking station for the material, the seventh blanking station for blanking the groove shape of the row, the eighth blanking station for blanking the second through hole, the inner hole of the row and the stator The ninth blanking station of the buckle point, the tenth blanking station for the blanking and rotation of the stator iron core.

The iron core manufacturing process for a motor for a new energy vehicle designed by the present invention enables the motor iron core with a positioning groove and a special-shaped structure to rotate after the iron core is formed, so that each iron core of the formed motor iron core is formed. The concentricity between them is better, and the dynamic balance during operation is also better. At the same time, the formed motor iron core is small in size and lightweight.

Description of drawings

Fig. 1 is the schematic diagram of the manufacturing process of the motor iron core;

Figure 2 is an exploded view of the stator core of the motor.

In the figure: the first forming hole 1, the second forming hole 2, the guide hole 3, the ventilation hole 4, the slot-shaped notch 5, the first through-piece hole 6, the rotor buckle point 7, the through hole 8, the first magnetic steel groove 9. The second magnetic steel slot 10, the outer shape forming area 12, the outer shape notch forming hole 121, the blanking hole 13, the rotor iron core 14, the stator slot 15, the second through-piece hole 16, the stator inner hole 17, the stator buckle point 18. Stator iron core 19, lugs 191, positioning grooves 192, material belt 100, first punching station 101, second punching station 102, third punching station 103, fourth punching station 104 , the fifth blanking station 105, the sixth blanking station 106, the seventh blanking station 107, the eighth blanking station 108, the ninth blanking station 109, the tenth blanking station 110, the rotor Axle hole 120.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

Example:

As shown in FIG. 1 and FIG. 2 , the iron core manufacturing process of a motor for a new energy vehicle described in this embodiment includes the following steps:

Step S1, the material belt 100 is conveyed in the direction of blanking in a continuous step-by-step manner between the upper die and the lower die of the continuous punching die, wherein a continuous step is formed between the upper die and the lower die of the continuous punching die. The continuous step-by-step punching station includes the first punching station 101 for punching the positive hole 3 and the forming hole, and the first punching station 101 for punching the ventilation hole 4 from the feeding to the blanking direction. The second punching station 102, the third punching station 103 for punching the first through hole 6, the fourth punching station 103 for punching the first magnetic steel slot 9, the rotor buckle point 7 and the through hole 8 The punching station 104 , the fifth punching station 105 for punching the second magnetic steel slot 10 , the rotor shaft hole 120 and the hole 121 for forming the outer shape notch, and the sixth punching station for punching the rotor iron core 14 The cutting station 106, the seventh punching station 107 for punching the sub-groove 15, the eighth punching station 108 for punching the second through hole 16, the inner hole 17 for punching the sub-section and the For the ninth blanking station 109 of the stator buckle point 18 and the tenth blanking station 110 for blanking and rotating the stator iron core 19 , the specific blanking and forming steps are as follows.

The rotor core sheet forming area of the material strip 100 is punched to form the rotor core sheet 14, the blanking holes 13 reserved on the material strip, the shape notch forming holes 121 and a plurality of through holes 8 arranged in an annular array , a plurality of through holes 8 are arranged around the blanking holes 13, and the outer shape forming areas 12 arranged in the three annular arrays on the material belt are all punched and formed with outer shape notch forming holes 121, so as to form a shape having three outer shape notch forming holes 121. The first preforming area, or two of the three contour forming areas 12 arranged in an annular array on the material strip, are respectively punched and formed with contour gap forming holes 121 to form a second preform having two contour gap forming holes 121 . The forming area; the steps are to prepare for the subsequent forming of the stator core piece 19, and the rotor core piece 14 is also formed correspondingly when the blanking hole 13 is formed. The iron core piece 19 greatly improves the material utilization rate. The first preforming area is provided for forming the stator iron core piece 19 without the tab 191 , and the second preforming area is for forming the stator iron with one tab 191 . chip 19 is provided.

In step S2, during the continuous stepwise conveying of the material belt 100, a plurality of stator grooves 15 arranged in an annular array are punched and formed on the material belt 100 around the blanking hole 13, and the stator grooves 15 are formed in the first The pre-forming area or the second pre-forming area, and proceed to step S3; the stator slot shape 15 necessary for the stator core of the motor can be effectively formed.

Step S3, during the continuous step-by-step conveying of the material belt 100, the inner hole 17 of the stator is punched and formed on the basis of the center of the blanking hole 13 in the first pre-forming area or the second pre-forming area, so that the stator groove is formed. 15 is communicated with the inner hole 17 of the stator. At the same time, after a plurality of stator buckle points 18 are punched and formed around the stator slot 15, step S4 is entered; in the step, the stator buckle points 18 are stacked as multiple stator iron cores 19. The necessary structure for fixing, so that after the iron core is formed, it is immediately buckled with the iron core in the blanking die, and the formed iron core is formed after the material is discharged. connection to improve production efficiency.

Step S4 , during the continuous step-by-step conveying of the material belt 100 , the through holes 8 arranged in a plurality of annular arrays in the first pre-forming area or the second pre-forming area are used as the punching boundary of the stator iron core 19 , and continuous punching is used to punch out the boundary. The edge of the forming punch of the cutting die corresponds to the punching boundary of the stator iron core 19, the stator core 19 is punched and formed, and then enters the blanking die; the stator core 19 is passed between the preset number of stator cores 19 through the stator buckle Point 18 is fixed to form the stator core of the motor; the stator core 19 formed on the first preforming area does not have the tabs 191, and the stator core 19 formed on the second preforming area is not formed in an outer shape forming area 12. When the shape is notched, a convex piece 191 is formed by punching; the steps need to cooperate with step S5 to form the positioning groove 192 on the stator iron core of the motor.

Step S5 , in the process of continuously conveying the material belt 100 step by step, after punching and forming the stator core 19 without the tabs 191 on the first preformed area formed twice in a row, The stator core 19 with a convex piece 191 is punched and formed on the preforming area, and after each piece of the stator core 19 is formed, the blanking die is rotated 120°, so that the formed motor stator core is formed with two convex pieces 191 between the two convex pieces 191. Positioning grooves 192 are formed between two stator iron cores 19 without lugs 191, and the positions of the lugs 191 on the stator core of the motor correspond to each other. The rotation setting in the steps enables the concentricity and verticality of the stator iron core of the motor to be effectively guaranteed, improves the working performance of the motor iron core, and meets the requirements required for the operation of the motor.

Preferably, in step S1, the steps of continuously forming the rotor core 14 are as follows:

In step S11 , during the continuous step-by-step conveying of the material belt 100 , a number of guide holes 3 and two first forming holes 1 and one for forming the groove-shaped notch 5 are punched and formed in the rotor iron core forming area. The second forming hole 2, the distance between the center point of the second forming hole 2 and the center point of the rotor core forming area is a straight line, and the center points of the two first forming holes 1 are respectively the center point of the rotor core forming area The distance between them is an oblique line, the angle between the straight line and the two oblique lines is 144°, and the angle between the two oblique lines is 72°, at this time, enter step S12;

Step S12, during the continuous step-by-step conveying of the material belt 100, according to the center point of the rotor iron core forming area as the center, ten ventilation holes 4 arranged in an annular array are punched and formed, and a part of the two first forming holes 1 is formed. The groove-shaped notch 5 is formed by overlapping with the two ventilation holes on one side respectively, and a part of the second forming hole 2 is formed by overlapping with a ventilation hole on the other side to form the groove-shaped notch 5, and then enter step S13;

Step S13, during the continuous step-by-step conveying of the material belt 100, according to the center point of the rotor core forming area as the center, punching is performed to form five first magnetic steel grooves 9 arranged in an annular array, and a plurality of magnetic steel grooves 9 arranged in an annular array. The through hole 8, a plurality of rotor buckle points 7, and three outer shape notch forming holes 121 or two outer shape notch forming holes 121, the first magnetic steel slot 9 is located on the side of the outer inner wall of the ventilation hole, and the through hole 8 is far away from the first magnetic hole. The steel groove 9 is set, and now it goes to step S14;

Step S14, during the continuous stepwise conveying of the material belt 100, punching and forming five second magnetic steel grooves 10 and rotor shaft holes 120 arranged in an annular array according to the center point of the rotor iron core forming area as the center, each There is a second magnetic steel groove 10 between the two first magnetic steel grooves 9, at this time, go to step S15;

Step S15, during the continuous step-by-step conveying of the material belt 100, the first magnetic steel slot 9 and the second magnetic steel slot 10 are used as the blanking boundary of the rotor iron core 14, and the edge of the forming punch of the continuous blanking die and the rotor are used. The iron core pieces 14 correspond to the punching boundaries, and the rotor iron core pieces 14 are punched to form the rotor core pieces 14 and enter into the blanking die, and enter a preset number of multiple rotor iron core pieces 14 to be fixed by the rotor buckle points 7 to form the motor rotor. The iron core, meanwhile, still retains a plurality of through holes 8 and blanking holes 13 on the strip.

The above steps form the motor rotor core before the motor stator core is formed, so that only one continuous punching die can form the motor rotor core and the motor stator core, so that the production efficiency of the motor core is greatly improved, and the two The manufacture of various types of iron cores is stable and reliable, and the cost is reduced.

Preferably, between step S12 and step S13, a step of punching the first through-sheet holes 6 is further included, and a plurality of first through-sheet holes 6 corresponding to the positions of the rotor buckle points 7 are punched and formed beside the ventilation holes. , so that the formed rotor core piece 14 has a first through-piece hole 6, and the first through-piece hole 6 on the rotor core piece 14 cannot form a fixed connection with the rotor buckle point 7 of the motor rotor core in the blanking die; The steps are set so that after the number of pieces of the rotor iron core of the motor reaches the preset number, the newly punched and formed rotor iron core piece 14 is not fixed with the formed motor rotor iron core, so that the plurality of formed motor rotor iron cores are in a position. detached state.

Preferably, between step S2 and step S3, there is also a step of punching the second through-sheet holes 16 , and a plurality of second through-holes 16 are punched and formed on the side of the stator slot 15 respectively corresponding to the positions of the stator buckle points 18 . Sheet hole 16, so that the formed stator iron core 19 has a second through sheet hole 16, and the second through sheet hole 16 on the stator iron core 19 and the stator buckle point 18 of the motor stator core in the blanking die cannot be formed. Fixing; the steps are set so that after the number of pieces of the motor stator iron core reaches the preset number, the newly punched and formed stator iron core piece 19 is not fixed with the formed motor stator iron core, so that a plurality of formed motor stator cores are formed. The iron core is in a separated state.

The present invention is not limited to the above-mentioned best embodiment, and anyone can obtain other various forms of products under the inspiration of the present invention, but no matter if any changes are made in its shape or structure, all products with the same or similar characteristics as those of the present application can be obtained. Similar technical solutions all fall within the protection scope of the present invention.

Claims (5)

1. a core manufacturing process for a motor for a new energy vehicle, is characterized in that, comprises the steps: Step S1, the material belt (100) is conveyed in the direction of blanking in a continuous step-by-step manner between the upper die and the lower die of the continuous blanking die, and the forming area of the rotor iron core sheet of the material belt (100) is punched, A rotor iron core sheet, a blanking hole (13) reserved on the material belt, a shape notch forming hole (121) and a plurality of through holes (8) arranged in an annular array are formed, and the plurality of through holes surround the blanking hole (13) is provided, and the outer shape forming areas (12) arranged in the three annular arrays on the material belt are all punched and formed with outer shape notch forming holes (121) to form a first pre-forming area with three outer shape notch forming holes , or two of the outer shape forming areas (12) provided in the three annular arrays on the material belt are respectively punched and formed with outer shape notch forming holes to form a second pre-forming area with two outer shape notch forming holes; Step S2, during the continuous step-by-step conveying of the material belt (100), a plurality of stator groove shapes (15) arranged in an annular array are punched and formed on the material belt around the blanking hole (13), and the stator grooves are formed. type in the first pre-forming zone or the second pre-forming zone, and enter step S3; Step S3, during the continuous step-by-step conveying of the material belt (100), the stator inner hole (17) is punched and formed on the basis of the center of the blanking hole (13) in the first pre-forming zone or the second pre-forming zone. ), so that the stator slot (15) is communicated with the stator inner hole (17), and at the same time, after the periphery of the stator slot (15) is punched and formed with a plurality of stator buckle points (18), enter step S4; Step S4, in the process of continuous step-by-step conveying of the material belt, in the first pre-forming area or the second pre-forming area, a plurality of through holes (8) arranged in an annular array are used as the punching boundary of the stator iron core (19), Using the edge of the forming punch of the continuous blanking die to correspond to the blanking boundary of the stator iron core, the stator core is punched and formed into the blanking die; the stator core is passed between a preset number of stator cores through the stator buckle Point (18) is fixed to form the stator iron core of the motor; the stator iron core formed on the first preforming area does not have the tabs (191), and the stator iron core formed on the second preforming area has a shape forming area ( 12) Punch out a tab (191) without forming a notch in the shape; Step S5, during the continuous step-by-step conveying of the material belt (100), after punching and forming the stator iron core (19) without the tabs on the formed first pre-forming area for two consecutive times, The second pre-forming area is punched to form a stator iron sheet with a convex piece, and after each piece of stator iron sheet is formed, the blanking die is rotated 120°, so that the formed motor stator iron core is formed between two convex pieces. Positioning grooves ( 192 ) are formed by separating two stator iron core sheets without fins, and the positions of the fins on the stator iron core of the motor correspond to each other. 2 . The iron core manufacturing process of a motor for a new energy vehicle according to claim 1 , wherein, in step S1 , the step of continuously forming the rotor iron core sheet ( 14 ) is as follows: 3 . Step S11 , during the continuous step-by-step conveying of the material belt ( 100 ), a plurality of guide holes ( 3 ) and two second holes ( 5 ) are punched and formed in the rotor iron core forming area. A forming hole (1) and a second forming hole (2), the distance between the center point of the second forming hole (2) and the center point of the rotor core forming area is a straight line, and the two first forming holes (1) The distance between the center point of ) and the center point of the rotor core forming area is an oblique line, the angle between the straight line and the two oblique lines is 144°, and the angle between the two oblique lines is 72° , then enter step S12; Step S12, during the continuous step-by-step conveying of the material belt (100), according to the center point of the rotor iron core forming area as the center, ten ventilation holes (4) arranged in an annular array are punched and formed, and two first forming A part of the hole (1) coincides with the two ventilation holes (4) on one side respectively to form a groove-shaped notch (5), and a part of a second molding hole (2) coincides with a ventilation hole (4) on the other side And the groove-shaped notch (5) is formed, and now it goes to step S13; Step S13, during the continuous step-by-step conveying of the material belt (100), according to the center point of the rotor iron core forming area as the center, punching is performed to form five first magnetic steel grooves (9) arranged in an annular array, a plurality of The through holes (8), the plurality of rotor buckle points (7), and three outer shape notch forming holes (121) or two outer shape notch forming holes (121) are arranged in an annular array, and the first magnetic steel groove (9) is located in the ventilation area. On the side of the inner wall of the outer side of the hole, the through hole (8) is arranged away from the first magnetic steel groove (9), and at this time, step S14 is entered; Step S14, during the continuous stepwise conveying of the material belt (100), according to the center point of the rotor core forming area as the center, punching is performed to form five second magnetic steel grooves (10) arranged in an annular array and the rotor shaft. In the hole (120), there is a second magnetic steel groove (10) between every two first magnetic steel grooves (9), at this time, go to step S15; Step S15, during the continuous step-by-step conveying of the material belt (100), the first magnetic steel slot (9) and the second magnetic steel slot (10) are used as the punching boundary of the rotor core (14), and continuous punching is used The edge of the forming punch of the mold corresponds to the punching boundary of the rotor iron sheet (14), and the rotor iron sheet (14) is punched and formed, and then enters the blanking die, and enters a preset number of multiple rotor iron sheets (14) They are fixedly connected by the rotor buckle point (7) to form the rotor iron core of the motor. At the same time, a plurality of through holes (8) and blanking holes (13) are still reserved on the material belt. 3. The iron core manufacturing process for a motor for a new energy vehicle according to claim 2, characterized in that between step S12 and step S13, it further comprises a step of punching out the first through-sheet hole (6), and in the ventilation A plurality of first through-sheet holes (6) corresponding to the positions of the respective rotor buckle points (7) are punched and formed on the side of the hole, so that the formed rotor iron core (14) has first through-sheet holes (6), In addition, the first through-sheet hole (6) on the rotor iron core (14) cannot form a fixed connection with the rotor buckle point (7) of the rotor core of the motor in the blanking die. 4 . The iron core manufacturing process of a motor for new energy vehicles according to claim 3 , characterized in that between step S2 and step S3 , it further comprises a step of punching out the second through-piece hole ( 16 ), and the stator The side of the slot (15) is punched and formed with a plurality of second through-piece holes (16) corresponding to the positions of the respective stator buckle points (18), so that the formed stator iron core (19) has a second through-piece hole (16), and the second through-sheet hole (16) on the stator iron core (19) cannot form a fixed connection with the stator buckle point (18) of the motor stator iron core in the blanking die. 5. The iron core manufacturing process of a motor for a new energy vehicle according to claim 4, wherein a continuous step-by-step blanking station is formed between the upper die and the lower die of the continuous blanking die, and the continuous blanking The step-by-step punching station sequentially includes a first punching station (101) for punching the guide holes (3) and forming holes, and a second punching station for punching the ventilation holes from the feeding to the blanking direction. A cutting station (102), a third punching station (103) for punching the first through-sheet hole (6), a first magnetic steel slot (9) for punching, a rotor buckle point (7) and The fourth punching station (104) for the through hole (8), the fifth punching station (105) for punching the second magnetic steel groove (10), the rotor shaft hole and the hole (121) for forming the contour notch , the sixth blanking station (106) for blanking the rotor core (14), the seventh blanking station (107) for blanking the sub-groove (15), the sixth blanking station (107) for blanking The eighth punching station (108) for the two-pass sheet hole (16), the ninth punching station (109) for punching the inner hole (17) of the stator and the fastening point (18) of the stator, for the stator iron A tenth blanking station (110) for blanking and rotating chips (19).

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