Manufacturing method of chained straight iron core

Abstract

According to the manufacturing method of the chain type straight bar iron core, the two first split shape holes or the two second split shape holes are formed in a staggered mode, so that the two long blanking holes in the bar material are distributed in a staggered mode, and the convex parts of the two long blanking holes are arranged in a staggered mode; and the tooth parts of the thin plates of the in-line iron core groups at the two blanking channels are formed in adjacent and staggered areas of the strip materials, so that the waste of raw materials of the strip materials is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of laminated iron cores of new energy automobile motors, and in particular to a method for manufacturing a chain-type straight iron core. Background Art

[0002] The stator core is an important component that constitutes the motor's magnetic flux circuit and fixes the stator coil. Therefore, the performance requirements of the stator core are relatively high. It is also an important component of new energy vehicle motors. However, the traditional stator core is formed by stacking multiple layers of complete laminations. However, this traditional stator core wastes a lot of raw materials during manufacturing, resulting in increased production costs, and the formed stator core cannot be unfolded, making it difficult to detect the inner wall of the stator core and automatically wind the teeth. Therefore, there are often insufficient or excessive winding coils or disordered winding, and the winding efficiency is low. At the same time, inaccurate detection results in a large number of defective products being returned after shipment.

[0003] Therefore, based on the above, there is an urgent need for a method for manufacturing a chain-type straight iron core that can overcome the above-mentioned defects. Summary of the invention

[0004] The present invention is a method for manufacturing a chain-type straight iron core designed to solve the above-mentioned technical problems.

[0005] A method for manufacturing a chain-type straight iron core designed by the present invention comprises: The strip material is subjected to continuous step-by-step punching in a continuous step-by-step motion, and two first end holes, four second end holes, and a plurality of first forming groups or second forming groups spaced apart along the length direction of the forming area of ​​the strip material are punched and formed in a forming area arranged along the width of the strip material, the two first end holes are located at the first end or the second end of the forming area of ​​the strip material, and the four second end holes are distributed in groups of two at both ends of the forming area of ​​the strip material, the first forming group includes two first segmented outer shape holes arranged adjacently and spaced apart along the length direction of the forming area of ​​the strip material, and the second forming group includes two second segmented outer shape holes arranged adjacently and spaced apart along the length direction of the forming area of ​​the strip material; A boundary hole is punched out at the inner end of each first divided outer shape hole or the inner end of each second divided outer shape hole, and each first divided outer shape hole and each second divided outer shape hole are respectively connected to the corresponding boundary hole; Punching and forming a slot-shaped hole communicating with each other between the boundary holes at the two first segmented outer shape holes of each first forming group or between the boundary holes at the two second segmented outer shape holes of each second forming group; Punching at least once on a first split outer shape hole or a split convex on one side of another first split outer shape hole of each first forming group to form a rotation buckle point or a rotation through-piece hole, or punching at least once on a second split outer shape hole or a split convex on one side of another second split outer shape hole of each second forming group to form a rotation buckle point or a rotation through-piece hole; Continuous punching is performed on the parts of each area used for thin plate forming where the thin plate shape is not formed, so as to blank and form a straight core group with rotation buckle points or rotation through-piece holes arranged along the length direction of the forming area of ​​the strip material in two blanking channels respectively, and continuously form and stack them in each blanking channel to form a chain straight strip core, wherein the straight core group includes a plurality of thin plates arranged at intervals along its length direction, and the ends of the thin plates of at least two adjacent straight core groups in the axial direction are rotationally connected by two adjacent rotation buckle points or by adjacent rotation buckle points and rotation through-piece holes, each thin plate is formed by the forming of a first segmented shape hole or a second segmented shape hole, a boundary hole and a slotted hole, and the first end hole and the second end hole are used for forming the shape of one end of the thin plate at the end of the straight core group.

[0006] According to the manufacturing method of the chain-type straight iron core described above, the forming steps for the two first split outer shape holes of each first forming group are: Punching and forming a plurality of first outer shape holes spaced apart along the length direction of the forming area in a forming area arranged along the width of the strip; A plurality of first segmentation holes are punched and formed in a forming area arranged along the width of the strip material and are spaced apart along the length direction of the forming area, wherein each first outer shape hole is located at the end of each of the plurality of first segmentation holes and is connected to each other to form a first segmentation outer shape hole; A plurality of second outer shape holes arranged at intervals along the length direction of the forming area are punched and formed in a forming area arranged along the width of the strip; A plurality of second segmentation holes arranged at intervals along the length direction of the forming area are punched and formed in a forming area arranged along the width of the strip material. Each second outer shape hole is located at the end of the plurality of second segmentation holes and is interconnected to form another first segmentation outer shape hole, and the two first segmentation outer shape holes are adjacent and staggered.

[0007] According to the manufacturing method of the chain-type straight iron core described above, the forming steps for the two second split outer shape holes of each second forming group are: Punching and forming a plurality of third outer shape holes spaced apart along the length direction of the forming area in a forming area arranged along the width of the strip; A plurality of third segmented holes are punched and formed in a forming area arranged along the width of the strip material and are spaced apart along the length direction of the forming area, wherein each third outer shape hole is located at the end of each of the plurality of third segmented holes and is connected to each other to form a second segmented outer shape hole; A plurality of fourth outer shape holes are punched and formed in a forming area arranged along the width of the strip material and arranged at intervals along the length direction of the forming area; A plurality of fourth dividing holes arranged at intervals along the length direction of the forming area are punched and formed in the forming area arranged along the width of the strip material. Each fourth outer shape hole is located at the end of the plurality of fourth dividing holes and is interconnected to form another second dividing outer shape hole, and the two second dividing outer shape holes are adjacent and staggered.

[0008] According to the manufacturing method of the chain-type straight iron core described above, the steps of punching out the boundary holes at the inner ends of the first divided outer holes are as follows: Punching a boundary hole interconnected with the first dividing hole at the inner end thereof; A boundary hole communicating with the second dividing hole is punched out at the inner end of the second dividing hole.

[0009] According to the manufacturing method of the chain-type straight iron core described above, the steps of punching and forming boundary holes at the inner ends of each second split outer shape hole are as follows: Punching a boundary hole interconnected with the third segmented hole at the inner end thereof; A boundary hole communicating with the fourth dividing hole is punched out at the inner end of the fourth dividing hole.

[0010] According to the manufacturing method of a chain-type straight iron core described above, at least one connecting point is punched out in the area used for forming each thin plate in the forming area of ​​the strip material, so that the thin plates in the axial direction of the chain-type straight iron core are connected through the connecting point.

[0011] According to the manufacturing method of the chain-type straight iron core described above, at least one connecting through-piece hole is punched and formed in the area for forming each thin plate in the forming area of ​​the strip material, and the in-line iron core group with the connecting through-piece hole is located at the end of the chain-type straight iron core; The connecting through-sheet hole forming step and the rotating through-sheet hole forming step are combined into one step, or the connecting through-sheet hole forming step is an independent forming step.

[0012] According to the above-mentioned method for manufacturing a chain-type straight iron core, adhesive is applied in the area for forming each thin plate in the forming area of ​​the strip material or in the forming area of ​​the strip material so that the thin plates in the axial direction of the chain-type straight iron core are connected by adhesive.

[0013] According to the manufacturing method of the chain-type straight iron core described above, when the ends of the thin plates of at least two adjacent straight iron core groups in the axial direction are rotatably connected through adjacent rotation buckle points and rotation through-piece holes, at least one straight iron core group with rotation through-piece holes or without rotation through-piece holes and rotation buckle points is stacked and connected on the surface of the straight iron core group with rotation through-piece holes; When the ends of the thin plates of at least two adjacent in-line core groups in the axial direction are rotationally connected through two adjacent rotation buckling points, the thin plates of each in-line core group in the chain-type in-line core are provided with a rotation buckling point.

[0014] According to the manufacturing method of the chain-type straight iron core described above, the two blanking channels are arranged away from each other or in parallel; A blanking die at a blanking channel is used to form an in-line core group formed by the first segmented hole, the first outer shape hole, the first end hole, the second end hole, the boundary hole and the slot hole, or is used to form an in-line core group formed by the third segmented hole, the third outer shape hole, the first end hole, the second end hole, the boundary hole and the slot hole; The blanking die at another blanking channel is used to form an in-line core group formed by the second segmented hole, the second outer shape hole, the first end hole, the second end hole, the boundary hole and the slot hole, or is used to form an in-line core group formed by the fourth segmented hole, the fourth outer shape hole, the first end hole, the second end hole, the boundary hole and the slot hole; Among them, after the blanking dies at the two blanking channels respectively form the in-line core groups, the two long blanking holes on the strip are staggered and distributed, and the convex parts of the two long blanking holes are staggered with each other, so that the teeth of each thin plate of the in-line core group at the two blanking channels are formed in the adjacent and staggered areas of the strip.

[0015] The present invention provides a method for manufacturing a movable motor core, and its beneficial effects are as follows: 1. The present invention utilizes two first segmented outer holes to be staggered or two second segmented outer holes to be staggered, so that two elongated blanking holes on the strip are staggered, and the convex portions of the two elongated blanking holes are staggered with each other, so that the teeth of the thin plates of the in-line core group at the two blanking channels are formed in the adjacent and staggered areas of the strip, thereby reducing the waste of raw materials of the strip.

[0016] 2. The two adjacent thin plates in each radial direction of the chain-type in-line core can be rotated and unfolded, thereby facilitating the inspection of the inside of the stator core and the winding of the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a layout diagram of the core manufacturing process.

[0018] Figure 2 is with Figure 1 The layout diagram of the core process for connecting the E end.

[0019] Figure 3 This is an enlarged view of point A.

[0020] Figure 4 This is an enlarged view of point B.

[0021] Figure 5 This is an enlarged view of point C.

[0022] Figure 6 This is an enlarged view of point D.

[0023] Figure 7 It is a schematic diagram of the structure of the in-line core group (I).

[0024] Figure 8 is based on Figure 7 The annular structure diagram of the in-line core group is formed.

[0025] Fig. 9 It is a schematic diagram of the structure of the in-line core group (II).

[0026] Fig.10 is based on Figure 8 The annular structure diagram of the in-line core group is formed.

[0027] Fig.11 It is a schematic diagram of the structure of a chain-type in-line core (I).

[0028] Fig.12 This is a schematic diagram of the structure of a chain-type in-line core (II).

[0029] Fig.13 Schematic diagram of the structure of another stacking method of chain-type in-line core.

[0030] In the figure: 100, strip material; 200, in-line core group; 201, thin plate; 202, tooth portion; 203, concave splicing groove; 204, convex splicing portion; 300, chain-type in-line core; 1, rotating through-piece hole; 2, connecting through-piece hole; 3, first end hole; 4, first outer shape hole; 5, first dividing hole; 6, second end hole; 7, second outer shape hole; 8, second dividing hole; 9, third outer shape hole; 14, third dividing hole; 10, first outer shape dividing hole; 11, fourth outer shape hole; 12, fourth dividing hole; 13, boundary hole; 15, slotted hole; 16, concave portion; 17, rotating buckle point; 18, convex edge; 19, connecting buckle point; 20, second outer shape dividing hole; 21, elongated blanking hole; 22, convex portion; 23, dividing convex. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0032] like Figure 1-Figure 13As shown, a method for manufacturing a chain-type straight iron core described in this embodiment includes: The strip material 100 is subjected to continuous step-by-step punching in a continuous step-by-step motion, and two first end holes 3, four second end holes 6, and multiple groups of first forming groups or second forming groups spaced apart along the length direction of the forming area of ​​the strip material 100 are punched and formed in a forming area set along the width of the strip material 100. The two first end holes 3 are located at the first end or the second end of the forming area of ​​the strip material 100, and the four second end holes 6 are distributed in groups of two at both ends of the forming area of ​​the strip material 100. The first forming group includes two first segmented outer shape holes that are adjacently arranged and spaced apart along the length direction of the forming area of ​​the strip material 100, and the second forming group includes two second segmented outer shape holes that are adjacently arranged and spaced apart along the length direction of the forming area of ​​the strip material 100; wherein the above-mentioned forming sequence is as follows: The strip material 100 is subjected to continuous step-by-step punching in a continuous step-by-step motion, and two staggered first end holes 3 are punched and formed at the first end or the second end of the forming area arranged along the width of the strip material 100 .

[0033] A plurality of first outer shape holes 4 are punched and formed in a forming area arranged along the width of the strip 100 and spaced apart along the length direction of the forming area. The inner side of the first outer shape hole 4 has two oppositely arranged concave portions 16, and the concave portions 16 are triangular in shape. A plurality of first segmentation holes 5 are punched and formed in a molding area arranged along the width of the strip 100 and are spaced apart along the length direction of the molding area. Each first outer shape hole 4 is located at the end of each of the plurality of first segmentation holes 5 and is connected to each other to form a first segmentation outer shape hole. The lower edge of the first segmentation hole 5 is a convex edge 18, which can be set in an arc. A plurality of second outer shape holes 7 are punched and formed in a forming area arranged along the width of the strip 100 and arranged at intervals along the length direction of the forming area. The inner side of the second outer shape hole 7 has two oppositely arranged concave portions 16, and the concave portions 16 are triangular in shape. A plurality of second segmented holes 8 are punched and formed in the molding area set along the width of the strip 100 and arranged at intervals along the length direction of the molding area. Each second outer shape hole 7 is located at the end of the plurality of second segmented holes 8 and is connected to each other to form another first segmented outer shape hole. The two first segmented outer shape holes are adjacent and staggered. The upper edge of the second segmented hole 8 is a convex edge 18, which can be set in an arc. Or A plurality of third outer shape holes 9 are punched and formed in a forming area arranged along the width of the strip 100 and spaced apart along the length direction of the forming area. The inner side of the third outer shape hole 9 has two oppositely arranged concave portions 16, and the concave portions 16 are triangular in shape. A plurality of third segmented holes 14 are punched and formed in a molding area arranged along the width of the strip 100 and are spaced apart along the length direction of the molding area. The third outer shape holes 9 are respectively located at the ends of the plurality of third segmented holes 14 and are connected to each other to form a second segmented outer shape hole. The upper edge of the third segmented hole 14 is a convex edge 18, which can be set in an arc. A plurality of fourth outer shape holes 11 are punched and formed in a forming area arranged along the width of the strip 100 and arranged at intervals along the length direction of the forming area. The inner side of the fourth outer shape hole 11 has two oppositely arranged concave portions 16, and the concave portions 16 are triangular in shape. A plurality of fourth dividing holes 12 are punched and formed in a forming area arranged along the width of the strip 100 and are arranged at intervals along the length direction of the forming area. Each fourth outer shape hole 11 is respectively located at the end of the plurality of fourth dividing holes 12 and is interconnected to form another second dividing outer shape hole, and the two second dividing outer shape holes are adjacent and staggered. The lower edge of the fourth dividing hole 12 is a convex edge 18, which can be set in a circular arc.

[0034] After the punching of the first segmented outer shape hole or the second segmented outer shape hole is completed, the step of punching the boundary hole 13 is entered.

[0035] Boundary holes 13 are punched out at the inner ends of each first divided outer hole or each second divided outer hole, and each first divided outer hole and each second divided outer hole are respectively connected to the corresponding boundary hole 13, and one side of the boundary hole 13 has an arc recess 16; the specific forming steps are as follows.

[0036] The steps for punching out the boundary hole 13 at the inner end of each first divided outer hole are as follows: punch out the boundary hole 13 interconnected with the inner end of the first divided hole 5; punch out the boundary hole 13 interconnected with the inner end of the second divided hole 8, and the boundary holes 13 at the two locations are staggered with each other.

[0037] The steps of punching out the boundary hole 13 at the inner end of each second divided outer hole are: punching out the boundary hole 13 interconnected with the inner end of the third divided hole 14; punching out the boundary hole 13 interconnected with the inner end of the fourth divided hole 12.

[0038] A slot-shaped hole 15 communicating with each other is punched out between the boundary holes 13 of the two first segmented outer holes of each first forming group or between the boundary holes 13 of the two second segmented outer holes of each second forming group. The specific forming steps are as follows.

[0039] A slot-shaped hole 15 is punched and formed between an extended end of the boundary hole 13 at the inner end of the first dividing hole 5 and an extended end of the boundary hole 13 at the inner end of the second dividing hole 8; A slot-shaped hole 15 is punched and formed between the other extended end of the boundary hole 13 at the inner end of the first dividing hole 5 and the other extended end of the boundary hole 13 at the inner end of the second dividing hole 8; In the above, the hole areas of the two slot holes 15 are different. Generally, the slot hole 15 formed for the first time is smaller than the slot hole 15 formed for the second time. The slot hole 15 is composed of an inclined hole and straight holes located at both ends of the inclined hole and staggered. The inclined hole is connected to the corresponding boundary hole 13 through two straight holes. The forming of the slot hole 15 results in a T-shaped tooth portion 202 in each thin plate 201.

[0040] A first split outer hole or a split outer hole of each first forming group is punched at least once on a split convex on one side to form a rotation buckle point 17 or a rotation through-piece hole 1, or a second split outer hole or a split outer hole of each second forming group is punched at least once on a split convex on one side to form a rotation buckle point 17 or a rotation through-piece hole 1; wherein, after forming a first split hole 5 or another first split hole 5, a split convex and a convex edge 18 can be formed, and after forming a second split hole 8 or another second split hole 8, a split convex and a convex edge 18 can also be formed. Therefore, when it is necessary to realize that each in-line core group 200 is stacked and connected by the rotating buckle point 17, the split convex parts of the two first split outer holes are formed with the rotating buckle point 17 to form two in-line core groups 200 synchronously, and the next two in-line core groups 200 are formed by the split convex parts of the two second split outer holes forming the rotating buckle point 17, so that the alternating continuous molding is carried out in this way, and the stacked in-line core groups 200 are rotatably connected to each other by the rotating buckle point 17, so that each thin layer of each in-line core group 200 in the chain in-line core 300 is The plates 201 are all provided with a rotation buckle point 17; or when it is necessary to realize that at least three adjacent in-line core groups 200 in the chain-type in-line core 300 are rotatably connected through the rotation buckle point 17 and the rotation through-piece hole 1, the split convex parts of the two first split outer holes are formed with the rotation buckle point 17 to synchronously form two in-line core groups 200, and the next two in-line core groups 200 are formed by the split convex parts of the two second split outer holes to form the rotation through-piece hole 1, so that the molding is alternately performed at least twice in this way, so that at least two adjacent in-line core groups 200 are connected through the rotation. The stacked group formed by the rotational connection between the buckle point 17 and the rotating through-piece hole 1 is located at one end and the middle of the chain-type in-line core 300, and the middle thin plate 201 of the in-line core group 200 between two stacked groups in the chain-type in-line core 300 is not punched to form the rotating buckle point 17 and the rotating through-piece hole 1 or only the rotating through-piece hole 1 is punched, so that at least one in-line core group 200 with a rotating through-piece hole 1 or without a rotating through-piece hole 1 and a rotating buckle point 17 is also stacked and connected on the surface of the in-line core group 200 with the rotating through-piece hole 1; thereby, one punching can realize the forming of two in-line core groups 200 simultaneously.

[0041] Continuous punching is performed on the parts of each area used for forming the thin plate 201 where the outer shape of the thin plate 201 is not formed, so that the straight core group 200 with rotation buckle points 17 or rotation through-sheet holes 1 set along the length direction of the forming area of ​​the strip material 100 is blanked and formed in two blanking channels respectively, and continuously formed and stacked in each blanking channel to form a chain straight strip core, further achieving the purpose of synchronously stacking and producing two chain straight cores 300 in two blanking channels. Among them, the in-line core group 200 includes a plurality of thin plates 201 arranged at intervals along its length direction, and the ends of the thin plates 201 of at least two adjacent in-line core groups 200 in the axial direction are rotationally connected through two adjacent rotation buckle points 17 or through adjacent rotation buckle points 17 and rotation through-piece holes 1, each thin plate 201 is formed by forming a first segmented outer shape hole or a second segmented outer shape hole, a boundary hole 13 and a slotted hole 15, and the first end hole 3 and the second end hole 6 are used for forming the outer shape of one end of the thin plate 201 at the end of the in-line core group 200.

[0042] Preferably, the two blanking channels are far away from each other or arranged in parallel; the blanking die at one blanking channel is used to form a straight-line core group 200 formed by the first segmentation hole 5, the first outer shape hole 4, the first end hole 3, the second end hole 6, the boundary hole 13 and the slot hole 15, or is used to form a straight-line core group 200 formed by the third segmentation hole 14, the third outer shape hole 9, the first end hole 3, the second end hole 6, the boundary hole 13 and the slot hole 15; the blanking die at the other blanking channel is used to form a straight-line core group 200 formed by the second segmentation hole 8, the second outer shape hole 7, the first end hole 3, the second end hole 6, the boundary hole 13 and the slot hole 15 The core group 200, or the in-line core group 200 formed by the fourth segmentation hole 12, the fourth outer shape hole 11, the first end hole 3, the second end hole 6, the boundary hole 13 and the slotted hole 15; wherein, after the blanking dies at the two blanking channels respectively form the in-line core group 200, the two elongated blanking holes 21 on the strip 100 are staggered, and the convex portions 22 of the two elongated blanking holes 21 are staggered with each other, so that the teeth 202 of each thin plate 201 of the in-line core group 200 at the two blanking channels are formed in the adjacent and staggered areas of the strip 100; this method greatly improves the material utilization rate of the strip 100.

[0043] In this embodiment, at least one connection point 19 is punched and formed in the area for forming each thin plate 201 in the forming area of ​​the strip material 100, so that the thin plates 201 in the axial direction of the chain-type straight iron core are connected through the connection point 19, and the thin plates 201 in the axial direction are connected through the connection point 19, so that the connection is more firm and reliable, and after the material is discharged from the blanking channel, it is a stacked chain-type straight iron core 300. In the forming area of ​​the strip material 100, at least one connecting through-piece hole 2 is punched and formed in the area for forming each thin plate 201, and the in-line core group 200 having the connecting through-piece hole 2 is located at the end of the chain straight strip core, and the arrangement is made in such a way that when the number of stacked in-line core groups 200 reaches the required number, the in-line core group 200 located at the end of the chain straight core 300 is formed with the connecting through-piece hole 2, so that each chain straight core 300 in the blanking channel can be discharged separately.

[0044] The step of forming the connecting through-piece hole 2 and the step of forming the rotating through-piece hole 1 are combined into one step, or the step of forming the connecting through-piece hole 2 is an independent forming step.

[0045] In another embodiment, glue is coated in the area used for forming each thin plate 201 in the forming area of ​​the strip 100 or in the forming area of ​​the strip 100, so that the thin plates 201 in the axial direction of the chain straight iron core are connected by glue, the connecting buckle point 19 and the connecting through-piece punching steps are replaced, and the area with the rotating through-piece hole 1 and the rotating buckle point 17 is not coated with glue when the glue is coated.

[0046] Finally, the two ends of the chain-type in-line core 300 are connected to form an annular motor stator core, and the first end hole 3 is used to form a concave splicing groove 203 at the end of the in-line core group 200, so that after the two ends of the in-line core group 200 are connected, the two ends are spliced ​​together through the concave splicing groove 203 and the convex splicing part 204.

[0047] In addition, the sequence of punching stations for punching the strip material by the continuous punching die includes: a rotating through-piece hole punching station, a rotating through-piece hole and a connecting through-piece hole punching station, a first end hole punching station, a first outer shape hole punching station, a first dividing hole and a second end hole punching station, a second outer shape hole and two second end holes punching station, a second dividing hole and a second end hole punching station, a third outer shape hole punching station, a third dividing hole punching station, a fourth outer shape hole punching station, a fourth dividing hole punching station, a boundary hole punching station, another boundary hole punching station, a slot hole punching station, another slot hole punching station, a connecting buckle point punching station, a rotating buckle point punching station, a blanking station, another connecting buckle point punching station, another rotating buckle point punching station and another blanking station. Among them, the first dividing hole and second end hole punching station, the second outer shape hole and two second end hole punching stations, and the second dividing hole and second end hole punching station can form the dividing holes, outer shape holes and second end holes or only form the second end holes when working.

Claims

1. A method for manufacturing a chain-type straight iron core, characterized in that: include: The strip material (100) is subjected to continuous step-by-step punching in a continuous step-by-step motion, and two first end holes (3), four second end holes (6), and a plurality of first forming groups or second forming groups spaced apart along the length direction of the forming area of ​​the strip material (100) are punched and formed in a forming area arranged along the width of the strip material (100), the two first end holes (3) are located at the first end or the second end of the forming area of ​​the strip material (100), the four second end holes (6) are distributed in groups of two at both ends of the forming area of ​​the strip material (100), the first forming group includes two first segmented outer shape holes arranged adjacent to each other and spaced apart along the length direction of the forming area of ​​the strip material (100), and the second forming group includes two second segmented outer shape holes arranged adjacent to each other and spaced apart along the length direction of the forming area of ​​the strip material (100); A boundary hole (13) is punched out at the inner end of each first divided outer shape hole or the inner end of each second divided outer shape hole, and each first divided outer shape hole and each second divided outer shape hole are respectively connected to the corresponding boundary hole (13); A slot-shaped hole (15) communicating with each other is punched and formed between the boundary holes (13) at the two first segmented outer shape holes of each first forming group or between the boundary holes (13) at the two second segmented outer shape holes of each second forming group; Punching at least once on a first split outer shape hole or a split convex on one side of another first split outer shape hole of each first forming group to form a rotation buckle point (17) or a rotation through-piece hole (1), or punching at least once on a second split outer shape hole or a split convex on one side of another second split outer shape hole of each second forming group to form a rotation buckle point (17) or a rotation through-piece hole (1); The portion of each area for forming the thin plate (201) where the outer shape of the thin plate (201) is not formed is continuously blanked, so that a straight core group (200) with a rotation buckle point (17) or a rotation through-sheet hole (1) arranged along the length direction of the forming area of ​​the strip material (100) is blanked and formed in two blanking channels respectively, and the straight core group (200) is continuously formed in each blanking channel and stacked and connected to form a chain straight strip core, wherein the straight core group (200) includes a plurality of thin plates (201) arranged at intervals along the length direction thereof, and the straight core group (200) is connected to the thin plates (201) in the axial direction. At least one of the ends of the thin plates (201) of two adjacent in-line core groups (200) is rotationally connected via two adjacent rotation buckle points (17) or rotationally connected via adjacent rotation buckle points (17) and a rotation through-plate hole (1); each thin plate (201) is formed by forming a first segmented outer shape hole or a second segmented outer shape hole, a boundary hole (13) and a slot-shaped hole (15); and the first end hole (3) and the second end hole (6) are used for forming the outer shape of one end of the thin plate (201) at the end of the in-line core group (200).

2. The method for manufacturing a chain-type straight iron core according to claim 1, characterized in that: The forming steps for the two first segmented outer shape holes of each first forming group are: A plurality of first outer shape holes (4) are punched and formed in a forming area arranged along the width of a strip material (100) and are spaced apart along the length direction of the forming area, wherein the inner side of the first outer shape hole (4) has two oppositely arranged recessed portions (16); A plurality of first segmentation holes (5) are punched and formed in a molding area arranged along the width of the strip (100) and are spaced apart along the length direction of the molding area. Each first outer shape hole (4) is located at the end of each of the plurality of first segmentation holes (5) and is interconnected to form a first segmentation outer shape hole. The lower edge of the first segmentation hole (5) is a convex edge (18); A plurality of second outer shape holes (7) arranged at intervals along the length direction of the forming area are punched and formed in a forming area arranged along the width of the strip material (100), and the inner side of the second outer shape hole (7) has two oppositely arranged recessed portions (16); A plurality of second segmentation holes (8) are punched and formed in a molding area arranged along the width of the strip (100) and are arranged at intervals along the length direction of the molding area. Each second outer shape hole (7) is located at the end of each of the plurality of second segmentation holes (8) and is connected to each other to form another first segmentation outer shape hole. The two first segmentation outer shape holes are adjacent and staggered, and the upper edge of the second segmentation hole (8) is a convex edge (18).

3. The method for manufacturing a chain-type straight iron core according to claim 2, characterized in that: The forming steps for the two second split outer shape holes of each second forming group are: A plurality of third outer shape holes (9) are punched and formed in a forming area arranged along the width of the strip (100) and are spaced apart along the length direction of the forming area, wherein the inner side of the third outer shape hole (9) has two oppositely arranged recessed portions (16); A plurality of third segmentation holes (14) are punched and formed in a molding area arranged along the width of the strip (100) and are spaced apart along the length direction of the molding area. Each third outer shape hole (9) is located at the end of each of the plurality of third segmentation holes (14) and is interconnected to form a second segmentation outer shape hole. The upper edge of the third segmentation hole (14) is a convex edge (18); A plurality of fourth outer shape holes (11) are punched and formed in a forming area arranged along the width of the strip material (100) and arranged at intervals along the length direction of the forming area, and the inner side of the fourth outer shape hole (11) has two oppositely arranged recessed portions (16); A plurality of fourth segmentation holes (12) are punched and formed in a molding area arranged along the width of the strip (100) and are arranged at intervals along the length direction of the molding area. Each fourth outer shape hole (11) is located at the end of the plurality of fourth segmentation holes (12) and is connected to each other to form another second segmentation outer shape hole. The two second segmentation outer shape holes are adjacent and staggered. The lower edge of the fourth segmentation hole (12) is a convex edge (18).

4. The method for manufacturing a chain-type straight iron core according to claim 2, characterized in that: The steps for punching out the boundary holes (13) at the inner ends of the first divided outer holes are as follows: Punching out a boundary hole (13) at the inner end of the first dividing hole (5) and communicating with the first dividing hole (5); A boundary hole (13) communicating with the second dividing hole (8) is punched out at the inner end thereof.

5. The method for manufacturing a chain-type straight iron core according to claim 3, characterized in that: The steps for punching out the boundary holes (13) at the inner ends of the second divided outer holes are as follows: Punching out a boundary hole (13) at the inner end of the third dividing hole (14) and communicating with the third dividing hole (14); A boundary hole (13) communicating with the fourth dividing hole (12) is punched out at the inner end thereof.

6. A method for manufacturing a chain-type straight iron core according to any one of claims 1 to 5, characterized in that: At least one connection point (19) is punched and formed in the area for forming each thin plate (201) in the forming area of ​​the strip material (100), so that the thin plates (201) in the axial direction of the chain-type straight iron core are connected through the connection point (19).

7. The method for manufacturing a chain-type straight iron core according to claim 6, characterized in that: At least one connecting through-piece hole (2) is punched and formed in the area for forming each thin plate (201) in the forming area of ​​the strip material (100), and the straight core group (200) having the connecting through-piece hole (2) is located at the end of the chain-type straight strip core; The step of forming the connecting through-piece hole (2) and the step of forming the rotating through-piece hole (1) are combined into one step, or the step of forming the connecting through-piece hole (2) is an independent forming step.

8. The method for manufacturing a chain-type straight iron core according to claim 6, characterized in that: Adhesive is applied in the area for forming each thin plate (201) in the forming area of ​​the strip (100) or in the forming area of ​​the strip (100) so that the thin plates (201) in the axial direction of the chain-type straight iron core are connected by the adhesive.

9. The method for manufacturing a chain-type straight iron core according to claim 1, characterized in that: When the ends of the thin plates (201) of at least two adjacent in-line core groups (200) in the axial direction are rotatably connected via adjacent rotation buckle points (17) and rotation through-holes (1), at least one in-line core group (200) with a rotation through-hole (1) or without a rotation through-hole (1) and rotation buckle points (17) is stacked and connected on the surface of the in-line core group (200) with the rotation through-hole (1); When the ends of the thin plates (201) of at least two adjacent in-line core groups (200) in the axial direction are rotationally connected via two adjacent rotation buckle points (17), the thin plates (201) of each in-line core group (200) in the chain-type in-line core (300) are provided with a rotation buckle point (17).

10. The method for manufacturing a chain-type straight iron core according to claim 3, characterized in that: The two blanking channels are arranged far away from each other or in parallel; A blanking die at a blanking channel is used to form an in-line core group (200) formed by forming a first segmented hole (5), a first outer shape hole (4), a first end hole (3), a second end hole (6), a boundary hole (13) and a slotted hole (15), or is used to form an in-line core group (200) formed by forming a third segmented hole (14), a third outer shape hole (9), a first end hole (3), a second end hole (6), a boundary hole (13) and a slotted hole (15); The blanking die at the other blanking channel is used to form an in-line core group (200) formed by the second segmented hole (8), the second outer shape hole (7), the first end hole (3), the second end hole (6), the boundary hole (13) and the slot hole (15), or is used to form an in-line core group (200) formed by the fourth segmented hole (12), the fourth outer shape hole (11), the first end hole (3), the second end hole (6), the boundary hole (13) and the slot hole (15); Among them, after the blanking dies at the two blanking channels respectively form the in-line core groups (200), the two elongated blanking holes (21) on the strip material (100) are staggered and distributed, and the convex parts (22) of the two elongated blanking holes (21) are staggered with each other, so that the teeth (202) of each thin plate (201) of the in-line core groups (200) at the two blanking channels are formed in adjacent and staggered areas of the strip material (100).

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