A manufacturing method of a chain-shaped straight iron core

Abstract

A manufacturing method of a chain-shaped straight iron core disclosed by the present invention. Two first split outer shape holes are formed with dislocation or two second split outer shape holes are formed with dislocation, so that two long blanking holes on the strip are distributed with dislocation, and the convex parts of the two long blanking holes are arranged with dislocation relative to each other, so that the tooth parts of the thin plates of the in-line iron core groups at the two blanking channels are formed in the adjacent and dislocated areas of the strip, thereby reducing the waste of the raw material of the strip.

Description

Technical Field

[0001] The present invention relates to the technical field of laminated iron cores for motors of new energy vehicles, and particularly to a manufacturing method for a chain-shaped straight iron core. Background Art

[0002] The stator iron core is an important component that constitutes the magnetic flux circuit of the motor and fixes the stator coil. Therefore, high performance requirements are imposed on the stator iron core, and it is also an important part of the motor of new energy vehicles. However, the traditional stator iron core is formed by laminating multiple complete laminations. However, this traditional stator iron core wastes a lot of raw materials during manufacturing, resulting in an increase in production costs, and the formed stator iron core cannot be unfolded, making it difficult to detect the inner wall of the stator iron core and perform automatic winding on the teeth. Therefore, there are often insufficient or excessive number of winding turns or winding disorders, and the winding efficiency is low, and at the same time, the detection is inaccurate, resulting in a large number of defective products being returned after shipment.

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

[0004] A manufacturing method for a chain-shaped straight iron core designed by the present invention to solve the above technical problems.

[0005] The manufacturing method for a chain-shaped straight iron core designed by the present invention includes:

[0006] The strip material is continuously step-fed and continuously step-blanked, and two first end holes, four second end holes, and multiple first forming groups or second forming groups that are spaced apart along the length direction of the forming area of the strip material are blanked and formed in the forming area provided 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, the four second end holes are distributed in pairs at both ends of the forming area of the strip material, the first forming group includes two first dividing contour holes that are adjacent and spaced apart along the length direction of the forming area of the strip material, and the second forming group includes two second dividing contour holes that are adjacent and spaced apart along the length direction of the forming area of the strip material;

[0007] Boundary holes are blanked and formed at the inner ends of each of the first dividing contour holes or at the inner ends of each of the second dividing contour holes, and each of the first dividing contour holes and each of the second dividing contour holes are respectively communicated with the corresponding boundary holes;

[0008] Slot-shaped holes that are communicated with each other are blanked and formed between the boundary holes at the two first dividing contour holes of each first forming group or between the boundary holes at the two second dividing contour holes of each second forming group;

[0009] At least blanking once on the split convex on one side of a first split outer shape hole or another first split outer shape hole in each first forming group to form a rotating buckle point or a rotating through-sheet hole, or at least blanking once on the split convex on one side of a second split outer shape hole or another second split outer shape hole in each second forming group to form a rotating buckle point or a rotating through-sheet hole;

[0010] Continuously blank the parts in each area for thin plate forming where the thin plate outer shape is not formed, so as to respectively blank and form in two blanking channels an in-line iron core group with rotating buckle points or rotating through-sheet holes arranged along the length direction of the forming area of the strip material, and continuously form and stack and connect in each blanking channel to form a chain-shaped straight iron core. Among them, the in-line iron core group includes a plurality of thin plates arranged at intervals along its length direction, and at least at one axial position, the thin plate ends between adjacent two in-line iron core groups are rotationally connected through adjacent two rotating buckle points or rotationally connected through adjacent rotating buckle points and rotating through-sheet holes. Each thin plate is formed by the forming of a first split outer shape hole or a second split outer shape hole, as well as a boundary hole and a groove-shaped hole, and the first end hole and the second end hole are used for forming the outer shape of one end of the thin plate at the end of the in-line iron core group.

[0011] According to the manufacturing method of a chain-shaped straight iron core described above, for the forming steps of two first split outer shape holes in each first forming group:

[0012] Blanking and forming a plurality of first outer shape holes distributed at intervals along the length direction of the forming area in the forming area arranged along the width of the strip material;

[0013] Blanking and forming a plurality of first split holes distributed at intervals along the length direction of the forming area in the forming area arranged along the width of the strip material. Each first outer shape hole is respectively located at the end of a plurality of first split holes and is connected and arranged with each other to form a first split outer shape hole;

[0014] Blanking and forming a plurality of second outer shape holes arranged at intervals along the length direction of the forming area in the forming area arranged along the width of the strip material;

[0015] Blanking and forming a plurality of second split holes arranged at intervals along the length direction of the forming area in the forming area arranged along the width of the strip material. Each second outer shape hole is respectively located at the end of a plurality of second split holes and is connected and arranged with each other to form another first split outer shape hole, and the two first split outer shape holes are adjacent and arranged in a staggered manner.

[0016] According to the manufacturing method of a chain-shaped straight iron core described above, for the forming steps of two second split outer shape holes in each second forming group:

[0017] Blanking and forming a plurality of third outer shape holes distributed at intervals along the length direction of the forming area in the forming area arranged along the width of the strip material;

[0018] In the forming area set along the width of the strip material, a plurality of third dividing holes spaced apart in the length direction of the forming area are punched and formed. Each third outer shape hole is located at the end of a plurality of third dividing holes and is communicated with each other to form a second dividing outer shape hole.

[0019] In the forming area set along the width of the strip material, a plurality of fourth outer shape holes arranged at intervals in the length direction of the forming area are punched and formed.

[0020] In the forming area set along the width of the strip material, a plurality of fourth dividing holes arranged at intervals in the length direction of the forming area are punched and formed. Each fourth outer shape hole is located at the end of a plurality of fourth dividing holes and is communicated with each other to form another second dividing outer shape hole, and the two second dividing outer shape holes are adjacent and arranged in a staggered manner.

[0021] According to the manufacturing method of a chain-type straight iron core described above, the step of punching and forming a boundary hole at the inner end of each first dividing outer shape hole is as follows:

[0022] At the inner end of the first dividing hole, a boundary hole communicated with it is punched and formed.

[0023] At the inner end of the second dividing hole, a boundary hole communicated with it is punched and formed.

[0024] According to the manufacturing method of a chain-type straight iron core described above, the step of punching and forming a boundary hole at the inner end of each second dividing outer shape hole is as follows:

[0025] At the inner end of the third dividing hole, a boundary hole communicated with it is punched and formed.

[0026] At the inner end of the fourth dividing hole, a boundary hole communicated with it is punched and formed.

[0027] According to the manufacturing method of a chain-type straight iron core described above, at least one connecting buckle point is punched and formed in the area for each thin plate forming 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 buckle points.

[0028] According to the manufacturing method of a chain-type straight iron core described above, at least one connecting through-hole is punched and formed in the area for each thin plate forming in the forming area of the strip material. The straight iron core group with the connecting through-hole is located at the end of the chain-type straight iron core.

[0029] The forming step of the connecting through-hole and the forming step of the rotating through-hole are combined into one step, or the forming step of the connecting through-hole is an independent forming step.

[0030] According to the manufacturing method of a chain - type straight iron core described above, glue is coated 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 the glue.

[0031] According to the manufacturing method of a chain - type straight iron core described above, when the ends of the thin plates of at least one pair of axially adjacent straight - row iron - core groups are rotationally connected by adjacent rotating buckle points and rotating through - plate holes, at least one straight - row iron - core group with or without rotating through - plate holes and rotating buckle points is further laminated and connected to the surface of the straight - row iron - core group with rotating through - plate holes;

[0032] When the ends of the thin plates of at least one pair of axially adjacent straight - row iron - core groups are rotationally connected by two adjacent rotating buckle points, each thin plate of each straight - row iron - core group in the chain - type straight - row iron core is provided with a rotating buckle point.

[0033] According to the manufacturing method of a chain - type straight iron core described above, the two blanking channels are arranged far from each other or side by side;

[0034] The blanking die at one blanking channel is used to form a straight - row iron - core group formed by the formation of a first dividing hole, a first outer - shape hole, a first end hole, a second end hole, a boundary hole and a groove - shaped hole, or is used to form a straight - row iron - core group formed by the formation of a third dividing hole, a third outer - shape hole, a first end hole, a second end hole, a boundary hole and a groove - shaped hole;

[0035] The blanking die at the other blanking channel is used to form a straight - row iron - core group formed by the formation of a second dividing hole, a second outer - shape hole, a first end hole, a second end hole, a boundary hole and a groove - shaped hole, or is used to form a straight - row iron - core group formed by the formation of a fourth dividing hole, a fourth outer - shape hole, a first end hole, a second end hole, a boundary hole and a groove - shaped hole;

[0036] Wherein, after the blanking dies at the two blanking channels respectively form the straight - row iron - core groups, the two long - shaped blanking holes on the strip material are distributed in a staggered manner, and the convex parts of the two long - shaped blanking holes are arranged in a staggered manner, so that the tooth parts of the thin plates of the straight - row iron - core groups at the two blanking channels are formed in the adjacent and staggered areas of the strip material.

[0037] The beneficial effects of the manufacturing method of a movable motor iron core designed by the present invention are as follows:

[0038] 1. By using the staggered forming of two first dividing outer - shape holes or two second dividing outer - shape holes, the two long - shaped blanking holes on the strip material are distributed in a staggered manner, and the convex parts of the two long - shaped blanking holes are arranged in a staggered manner, so that the tooth parts of the thin plates of the straight - row iron - core groups at the two blanking channels are formed in the adjacent and staggered areas of the strip material, thereby reducing the waste of the raw material of the strip material.

[0039] 2. Enable adjacent two thin plates in the radial direction at each position in the chain-type in-line iron core to rotate and unfold, so as to facilitate the inspection of the interior of the stator iron core and the winding of the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is the layout drawing of the iron core manufacturing process.

[0041] Figure 2 It is related to Figure 1 The layout drawing of the iron core process connected to the E end in

[0042] Figure 3 It is the enlarged view of position A.

[0043] Figure 4 It is the enlarged view of position B.

[0044] Figure 5 It is the enlarged view of position C.

[0045] Figure 6 It is the enlarged view of position D.

[0046] Figure 7 It is the structural schematic diagram (one) of the in-line iron core group.

[0047] Figure 8 It is based on Figure 7 The formed ring-shaped structure diagram of the in-line iron core group.

[0048] Figure 9 It is the structural schematic diagram (two) of the in-line iron core group.

[0049] Figure 10 It is based on Figure 8 The formed ring-shaped structure diagram of the in-line iron core group.

[0050] Figure 11 It is the structural schematic diagram (one) of the chain-type in-line iron core.

[0051] Figure 12 It is the structural schematic diagram (two) of the chain-type in-line iron core.

[0052] Figure 13 The structural schematic diagram of another stacking method of the chain-type in-line iron core.

[0053] In the figure: 100, strip material; 200, in-line iron core group; 201, thin plate; 202, tooth part; 203, concave splicing groove; 204, convex splicing part; 300, chain-type in-line iron core; 1, rotating through-hole; 2, connecting through-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, groove-shaped hole; 16, concave part; 17, rotating buckle point; 18, convex edge; 19, connecting buckle point; 20, second outer shape dividing hole; 21, long blanking hole; 22, convex part; 23, dividing convex. Detailed implementation mode

[0054] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0055] As Figures 1-13 shown, a manufacturing method of a chain-type straight iron core described in this embodiment includes:

[0056] The strip material 100 is subjected to continuous step-by-step blanking in a continuous step-by-step movement, and two first end holes 3, four second end holes 6, and multiple first forming groups or second forming groups spaced along the length direction of the forming area of the strip material 100 are blanked and formed in the forming area provided 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 pairs at both ends of the forming area of the strip material 100, the first forming group includes two first dividing outer shape holes arranged adjacent to each other and spaced along the length direction of the forming area of the strip material 100, and the second forming group includes two second dividing outer shape holes arranged adjacent to each other and spaced along the length direction of the forming area of the strip material 100; wherein, the above forming sequence is as follows:

[0057] The strip material 100 is subjected to continuous step-by-step blanking in a continuous step-by-step movement, and two first end holes 3 arranged in a staggered manner are blanked and formed at the first end or the second end of the forming area provided along the width of the strip material 100.

[0058] In the forming area provided along the width of the strip material 100, multiple first outer shape holes 4 spaced along the length direction of the forming area are blanked and formed. The inner side of the first outer shape hole 4 has two opposite concave parts 16, and the concave parts 16 are triangular in shape;

[0059] In the forming area set along the width of the strip 100, a plurality of first dividing holes 5 are punched and formed at intervals along the length direction of the forming area. Each first outer shape hole 4 is located at the end of a plurality of first dividing holes 5 and is connected to each other to form a first dividing outer shape hole. The lower side edge of the first dividing hole 5 is a convex edge 18, and the convex edge 18 can be set as an arc;

[0060] In the forming area set along the width of the strip 100, a plurality of second outer shape holes 7 are punched and formed 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;

[0061] In the forming area set along the width of the strip 100, a plurality of second dividing holes 8 are punched and formed at intervals along the length direction of the forming area. Each second outer shape hole 7 is located at the end of a plurality of second dividing holes 8 and is connected to each other to form another first dividing outer shape hole. And the two first dividing outer shape holes are adjacent and arranged in a staggered manner. The upper side edge of the second dividing hole 8 is a convex edge 18, and the convex edge 18 can be set as an arc. Or

[0062] In the forming area set along the width of the strip 100, a plurality of third outer shape holes 9 are punched and formed at intervals 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;

[0063] In the forming area set along the width of the strip 100, a plurality of third dividing holes 14 are punched and formed at intervals along the length direction of the forming area. Each third outer shape hole 9 is located at the end of a plurality of third dividing holes 14 and is connected to each other to form a second dividing outer shape hole. The upper side edge of the third dividing hole 14 is a convex edge 18, and the convex edge 18 can be set as an arc;

[0064] In the forming area set along the width of the strip 100, a plurality of fourth outer shape holes 11 are punched and formed 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;

[0065] In the forming area set along the width of the strip 100, a plurality of fourth dividing holes 12 are punched and formed at intervals along the length direction of the forming area. Each fourth outer shape hole 11 is located at the end of a plurality of fourth dividing holes 12 and is connected to each other to form another second dividing outer shape hole. And the two second dividing outer shape holes are adjacent and arranged in a staggered manner. The lower side edge of the fourth dividing hole 12 is a convex edge 18, and the convex edge 18 can be set as an arc.

[0066] After the punching of the above first dividing outer shape hole or second dividing outer shape hole is completed, the boundary hole 13 punching step is entered.

[0067] Boundary holes 13 are blanked and formed at the inner ends of each of the first divided outer-shaped holes or at the inner ends of each of the second divided outer-shaped holes, and each of the first divided outer-shaped holes and each of the second divided outer-shaped holes communicate with the corresponding boundary holes 13 respectively. One side of the boundary hole 13 has an arc concave portion 16. The specific forming steps are as follows.

[0068] The steps for blanking and forming the boundary hole 13 at the inner end of each of the first divided outer-shaped holes are: blanking and forming the boundary hole 13 communicating with it at the inner end of the first divided hole 5; blanking and forming the boundary hole 13 communicating with it at the inner end of the second divided hole 8, and the two boundary holes 13 are arranged in a staggered manner.

[0069] The steps for blanking and forming the boundary hole 13 at the inner end of each of the second divided outer-shaped holes are: blanking and forming the boundary hole 13 communicating with it at the inner end of the third divided hole 14; blanking and forming the boundary hole 13 communicating with it at the inner end of the fourth divided hole 12.

[0070] Blanking and forming a slot-shaped hole 15 communicating with it between the boundary holes 13 at the two first divided outer-shaped holes in each first forming group or between the boundary holes 13 at the two second divided outer-shaped holes in each second forming group. The specific forming steps are as follows.

[0071] A slot-shaped hole 15 is blanked and formed between one extension end of the boundary hole 13 at the inner end of the first divided hole 5 and one extension end of the boundary hole 13 at the inner end of the second divided hole 8;

[0072] A slot-shaped hole 15 is blanked and formed between the other extension end of the boundary hole 13 at the inner end of the first divided hole 5 and the other extension end of the boundary hole 13 at the inner end of the second divided hole 8;

[0073] Among the above, the hole areas of the two slot-shaped holes 15 are different. Generally, the slot-shaped hole 15 formed for the first time is smaller than the slot-shaped hole 15 formed for the second time, and the slot-shaped hole 15 is composed of an inclined hole and straight holes located at both ends of the inclined hole and arranged in a staggered manner. The inclined hole communicates with the corresponding boundary hole 13 through the two straight holes. The forming of the slot-shaped hole 15 results in the T-shaped tooth portions 202 in each thin plate 201.

[0074] At least one punching is performed on the dividing convex on one side of a first divided outer shape hole or another first divided outer shape hole in each first forming group to form the rotating buckle point 17 or the rotating through-sheet hole 1, or at least one punching is performed on the dividing convex on one side of a second divided outer shape hole or another second divided outer shape hole in each second forming group to form the rotating buckle point 17 or the rotating through-sheet hole 1; wherein, after a first divided hole 5 or another first divided hole 5 is formed, the dividing convex and the convex edge 18 of the convex edge 18 can be formed, and after a second divided hole 8 or another second divided hole 8 is formed, the dividing convex and the convex edge 18 of the convex edge 18 can also be formed. Therefore, when it is necessary to stack the in-line iron core groups 200 on each other and connect them through the rotating buckle point 17, the rotating buckle points 17 are formed at the dividing convexes of the two first divided outer shape holes, and then the two in-line iron core groups 200 are synchronously formed. The next two in-line iron core groups 200 are formed by forming the rotating buckle points 17 at the dividing convexes of the two second divided outer shape holes. Thus, the alternate continuous forming is carried out in this way to realize the rotation connection between the stacked in-line iron core groups 200 on each other through the rotating buckle point 17, so that each thin plate 201 of each in-line iron core group 200 in the chain-type in-line iron core 300 has the rotating buckle point 17; or when it is necessary to realize that at least three adjacent in-line iron core groups 200 in the chain-type in-line iron core 300 are rotationally connected through the rotating buckle point 17 and the rotating through-sheet hole 1, the rotating buckle points 17 are formed at the dividing convexes of the two first divided outer shape holes, and then the two in-line iron core groups 200 are synchronously formed. The next two in-line iron core groups 200 are formed by forming the rotating through-sheet holes 1 at the dividing convexes of the two second divided outer shape holes. Thus, the alternate forming is carried out at least twice in this way, so that the stacked groups formed by the rotational connection between at least two adjacent in-line iron core groups 200 through the rotating buckle point 17 and the rotating through-sheet hole 1 are located at one end and the middle of the chain-type in-line iron core 300, and the middle thin plate 201 of the in-line iron core group 200 between the two stacked groups in the chain-type in-line iron core 300 is not punched to form the rotating buckle point 17 and the rotating through-sheet hole 1 or only the rotating through-sheet hole 1 is punched, so that at least one in-line iron core group 200 with or without the rotating through-sheet hole 1 and the rotating buckle point 17 is also stacked and connected on the surface of the in-line iron core group 200 with the rotating through-sheet hole 1; thus, the forming of two in-line iron core groups 200 can be synchronously realized by one punching.

[0075] For each area used for forming the thin plate 201 where the outer shape of the thin plate 201 is not formed, continuous blanking is performed to blank and form in two blanking channels a straight core group 200 provided with rotating snap points 17 or rotating through-sheet holes 1 along the length direction of the forming area of the strip 100, and continuously form and stack-connect in each blanking channel to form a chain-shaped straight core, further achieving the purpose of synchronously forming and producing two chain-shaped straight cores 300 in two blanking channels respectively. Among them, the straight core group 200 includes a plurality of thin plates 201 arranged at intervals along its length direction, and at least one adjacent two thin plates 201 at the ends of two adjacent straight core groups 200 are rotationally connected through adjacent two rotating snap points 17 or rotationally connected through adjacent rotating snap points 17 and rotating through-sheet holes 1 in the axial direction. Each thin plate 201 is formed by the forming of a first divided outer shape hole or a second divided outer shape hole, as well as 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 straight core group 200.

[0076] Preferably, the two blanking channels are arranged away from each other or side by side; the blanking die at one blanking channel is used for forming the straight core group 200 formed by the formation of a first divided hole 5, a first outer shape hole 4, a first end hole 3, a second end hole 6, a boundary hole 13 and a slot-shaped hole 15, or for forming the straight core group 200 formed by the formation of a third divided hole 14, a third outer shape hole 9, a first end hole 3, a second end hole 6, a boundary hole 13 and a slot-shaped hole 15; the blanking die at the other blanking channel is used for forming the straight core group 200 formed by the formation of a second divided hole 8, a second outer shape hole 7, a first end hole 3, a second end hole 6, a boundary hole 13 and a slot-shaped hole 15, or for forming the straight core group 200 formed by the formation of a fourth divided hole 12, a fourth outer shape hole 11, a first end hole 3, a second end hole 6, a boundary hole 13 and a slot-shaped hole 15; among them, after the blanking dies at the two blanking channels respectively form the straight core group 200, the long blanking holes 21 at two positions on the strip 100 are distributed in a staggered manner, and the convex parts 22 of the long blanking holes 21 at the two positions are arranged in a staggered manner, so that the tooth parts 202 of the thin plates 201 of the straight 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.

[0077] In this embodiment, at least one connecting snap point 19 is blanked and formed in the area for forming each thin plate 201 in the forming area of the strip 100, so that the thin plates 201 in the axial direction of the chain-shaped straight core are connected through the connecting snap point 19. The connection between the thin plates 201 in the axial direction through the connecting snap point 19 makes the connection firm and reliable, and after discharging in the blanking channel, it is the chain-shaped straight core 300 connected in a stacked manner. Or

[0078] In the forming area of the strip 100, at least one connecting through-sheet hole 2 is blanked and formed within the area for forming each thin sheet 201. The in-line iron core group 200 with the connecting through-sheet hole 2 is located at the end of the chain-type straight iron core, and is arranged in such a way that when the number of stacked in-line iron core group 200 sheets reaches the required quantity, the in-line iron core group 200 located at the end of the chain-type straight iron core 300 is formed with the connecting through-sheet hole 2, so that each chain-type straight iron core 300 in the blanking channel can be discharged separately.

[0079] Among them, the forming step of the connecting through-sheet hole 2 and the forming step of the rotating through-sheet hole 1 are combined into one step, or the forming step of the connecting through-sheet hole 2 is an independent forming step.

[0080] In another embodiment, glue is coated within the area for forming each thin sheet 201 in the forming area of the strip 100 or in the forming area of the strip 100, so that the thin sheets 201 are connected to each other by glue in the axial direction of the chain-type straight iron core. The punching steps of the connecting buckle points 19 and the connecting through-sheets are replaced, and the area with the rotating through-sheet hole 1 and the rotating buckle points 17 is not coated with glue during glue coating.

[0081] Finally, the two ends of the chain-type straight iron core 300 are joined together to form an annular motor stator iron core. The first end hole 3 is used to form the concave splicing groove 203 at the end of the in-line iron core group 200, so that after the two ends of the in-line iron core group 200 are joined together, they are mutually spliced through the concave splicing groove 203 and the convex splicing part 204.

[0082] In addition, the punching station sequence of the continuous punching die for punching the strip successively includes: the rotating through-sheet hole punching station, the rotating through-sheet hole and connecting through-sheet hole punching station, the first end hole punching station, the first outer shape hole punching station, the first dividing hole and second end hole punching station, the second outer shape hole and two second end hole punching stations, the second dividing hole and second end hole punching station, the third outer shape hole punching station, the third dividing hole punching station, the fourth outer shape hole punching station, the fourth dividing hole punching station, one boundary hole punching station, another boundary hole punching station, one groove-shaped hole punching station, another groove-shaped hole punching station, one connecting buckle point punching station, one rotating buckle point punching station, one blanking station, another connecting buckle point punching station, another rotating buckle point punching station and another blanking station. Among them, when 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 are working, the dividing hole, outer shape hole and second end hole can be formed or only the second end hole can be formed.

Claims

1. A manufacturing method of a chain-shaped straight iron core, characterized in that, Including: The strip material (100) is subjected to continuous step-by-step blanking with continuous step-by-step movement, and two first end holes (3), four second end holes (6), and multiple first forming groups or second forming groups spaced along the length direction of the forming area of the strip material (100) are blanked and formed in the forming area provided 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 pairs at both ends of the forming area of the strip material (100). The first forming group includes two first split profile holes arranged adjacent to each other and spaced along the length direction of the forming area of the strip material (100). The second forming group includes two second split profile holes arranged adjacent to each other and spaced along the length direction of the forming area of the strip material (100). Boundary holes (13) are blanked and formed at the inner ends of each of the first split profile holes or the inner ends of each of the second split profile holes, and each of the first split profile holes and each of the second split profile holes are respectively communicated with the corresponding boundary holes (13). Slot-shaped holes (15) communicated with each other are blanked and formed between the boundary holes (13) at the two first split profile holes of each first forming group or between the boundary holes (13) at the two second split profile holes of each second forming group. At least one blanking is performed on the split convex on one side of one of the first split profile holes or the other first split profile hole of each first forming group to form a rotary snap point (17) or a rotary through-sheet hole (1), or at least one blanking is performed on the split convex on one side of one of the second split profile holes or the other second split profile hole of each second forming group to form a rotary snap point (17) or a rotary through-sheet hole (1). Continuous blanking is performed on the parts where the outer shape of the thin plate (201) is not formed in each area for forming the thin plate (201), so as to respectively blank and form in two blanking channels an in-line iron core group (200) with a rotary snap point (17) or a rotary through-sheet hole (1) arranged along the length direction of the forming area of the strip material (100), and continuously form and stack-connect in each blanking channel to form a chain-shaped straight iron core. Among them, the in-line iron core group (200) includes multiple thin plates (201) spaced along its length direction, and at least at one axial position, the ends of the thin plates (201) of two adjacent in-line iron core groups (200) are rotationally connected through two adjacent rotary snap points (17) or rotationally connected through an adjacent rotary snap point (17) and a rotary through-sheet hole (1). Each thin plate (201) is formed by the forming of the first split profile hole or the second split profile hole, and the boundary hole (13) and the slot-shaped hole (15). 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 iron core group (200).

2. The manufacturing method of a chain-shaped straight iron core according to claim 1, characterized in that, The forming steps for the two first split profile holes of each group of first forming groups are as follows: Multiple first profile holes (4) spaced along the length direction of the forming area are blanked and formed in the forming area provided along the width of the strip material (100). The inner side of the first profile hole (4) has two recesses (16) arranged opposite to each other. In the forming area arranged along the width of the strip material (100), a plurality of first dividing holes (5) spaced apart along the length direction of the forming area are blanked and formed. Each first outer shape hole (4) is respectively located at the end of a plurality of first dividing holes (5) and is arranged in communication with each other to form a first dividing outer shape hole. The lower side edge of the first dividing hole (5) is a convex edge (18); In the forming area arranged along the width of the strip material (100), a plurality of second outer shape holes (7) arranged at intervals along the length direction of the forming area are blanked and formed. The inner side of the second outer shape hole (7) has two oppositely arranged concave portions (16); In the forming area arranged along the width of the strip material (100), a plurality of second dividing holes (8) arranged at intervals along the length direction of the forming area are blanked and formed. Each second outer shape hole (7) is respectively located at the end of a plurality of second dividing holes (8) and is arranged in communication with each other to form another first dividing outer shape hole. And the two first dividing outer shape holes are adjacent and arranged in a staggered manner. The upper side edge of the second dividing hole (8) is a convex edge (18).

3. The manufacturing method of a chain-shaped straight iron core according to claim 2, characterized in that For the forming steps of the two second dividing outer shape holes of each group of second forming groups: In the forming area arranged along the width of the strip material (100), a plurality of third outer shape holes (9) spaced apart along the length direction of the forming area are blanked and formed. The inner side of the third outer shape hole (9) has two oppositely arranged concave portions (16); In the forming area arranged along the width of the strip material (100), a plurality of third dividing holes (14) spaced apart along the length direction of the forming area are blanked and formed. Each third outer shape hole (9) is respectively located at the end of a plurality of third dividing holes (14) and is arranged in communication with each other to form a second dividing outer shape hole. The upper side edge of the third dividing hole (14) is a convex edge (18); In the forming area arranged along the width of the strip material (100), a plurality of fourth outer shape holes (11) arranged at intervals along the length direction of the forming area are blanked and formed. The inner side of the fourth outer shape hole (11) has two oppositely arranged concave portions (16); In the forming area arranged along the width of the strip material (100), a plurality of fourth dividing holes (12) arranged at intervals along the length direction of the forming area are blanked and formed. Each fourth outer shape hole (11) is respectively located at the end of a plurality of fourth dividing holes (12) and is arranged in communication with each other to form another second dividing outer shape hole. And the two second dividing outer shape holes are adjacent and arranged in a staggered manner. The lower side edge of the fourth dividing hole (12) is a convex edge (18).

4. The manufacturing method of a chain-shaped straight iron core according to claim 2, characterized in that, For the step of blanking and forming a boundary hole (13) at the inner end of each first dividing outer shape hole: At the inner end of the first dividing hole (5), a boundary hole (13) communicating with it is blanked and formed; At the inner end of the second dividing hole (8), a boundary hole (13) communicating with it is blanked and formed.

5. The manufacturing method of a chain-shaped straight iron core according to claim 3, characterized in that, For the step of blanking and forming a boundary hole (13) at the inner end of each second dividing outer shape hole: At the inner end of the third dividing hole (14), a boundary hole (13) communicating with it is blanked and formed; At the inner end of the fourth dividing hole (12), a boundary hole (13) communicating with it is blanked and formed.

6. A manufacturing method of a chain-shaped straight iron core according to any one of claims 1-5, characterized in that, In the forming area of the strip material (100), at least one connecting buckle point (19) is blanked and formed within the area for forming each thin plate (201), so that the thin plates (201) are connected to each other through the connecting buckle points (19) in the axial direction of the chain-type straight iron core.

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

8. The manufacturing method of a chain-type straight iron core according to claim 6, characterized in that, In the area for forming each thin plate (201) in the forming area of the strip material (100) or in the forming area of the strip material (100), glue is coated so that the thin plates (201) are connected to each other through the glue in the axial direction of the chain-type straight iron core.

9. The manufacturing method of a chain-shaped 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 iron core groups (200) in the axial direction are rotationally connected through adjacent rotating buckle points (17) and rotating through-holes (1), at least one in-line iron core group (200) with or without a rotating through-hole (1) and rotating buckle points (17) is laminated and connected to the surface of the in-line iron core group (200) with a rotating through-hole (1). When the ends of the thin plates (201) of at least two adjacent in-line iron core groups (200) in the axial direction are rotationally connected through two adjacent rotating buckle points (17), each thin plate (201) of each in-line iron core group (200) in the chain-type in-line iron core (300) is provided with a rotating buckle point (17).

10. The manufacturing method of a chain-type straight iron core according to claim 3, characterized in that The two blanking channels are arranged away from each other or side by side. The blanking die at one blanking channel is used to form the in-line iron core group (200) formed by the formation of the first dividing hole (5), the first outer shape hole (4), the first end hole (3), the second end hole (6), the boundary hole (13) and the groove-shaped hole (15), or is used to form the in-line iron core group (200) formed by the formation of the third dividing hole (14), the third outer shape hole (9), the first end hole (3), the second end hole (6), the boundary hole (13) and the groove-shaped hole (15). The blanking die at the other blanking channel is used to form the in-line iron core group (200) formed by the formation of the second dividing hole (8), the second outer shape hole (7), the first end hole (3), the second end hole (6), the boundary hole (13) and the groove-shaped hole (15), or is used to form the in-line iron core group (200) formed by the formation of the fourth dividing hole (12), the fourth outer shape hole (11), the first end hole (3), the second end hole (6), the boundary hole (13) and the groove-shaped hole (15). Among them, after the blanking dies at the two blanking channels respectively form the in-line iron core groups (200), the two long blanking holes (21) on the strip (100) are arranged in a staggered manner, and the convex portions (22) of the two long blanking holes (21) are arranged in a staggered manner, so that the tooth portions (202) of the thin plates (201) of the in-line iron core groups (200) at the two blanking channels are formed in the adjacent and staggered areas of the strip (100).

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