Integrated stamping manufacturing method for casing and rotor of motor and motor

Abstract

The invention relates to the technical field of motor design and manufacturing, in particular to a motor shell and rotor integrated stamping manufacturing method and a motor. The invention provides a motor casing and rotor integrated stamping manufacturing method, which comprises the following steps of: performing primary stamping on the same strip by using the same set of composite stamping die so as to synchronously stamp an annular casing lamination and a rotor lamination positioned in the casing lamination; separating the shell lamination from the rotor lamination; laminating a plurality of casing laminations to form a casing part; laminating a plurality of rotor laminations to form a rotor portion; the rotor portion is fitted to the inside of the housing portion. The scheme has the advantages that the mold development cost is reduced, the material utilization rate is improved, and eddy current heating is reduced.

Description

Technical Field

[0001] This invention relates to the field of motor design and manufacturing technology, and in particular to a method for integrally stamping the housing and rotor of a motor and the motor itself. Background Technology

[0002] In the current manufacturing field of precision electrical appliances such as micromotors, the production of core components such as stators, rotors, and housings typically relies on stamping processes. The housing and rotor core laminations are two independent structural units that need to be manufactured separately. Specifically, the production process requires the preparation and maintenance of two different sets of stamping dies: one set is used to stamp circular rotor laminations from silicon steel strips, and the other set is used to form the housing structure through multiple stretching processes. This discrete manufacturing method is the norm in the industry.

[0003] However, the inherent drawbacks of this traditional two-mold division of labor become increasingly apparent during large-scale production. Firstly, independent mold development and maintenance directly lead to a significant increase in production costs, while also placing a considerable burden on human and material resources, hindering effective cost control. Particularly noteworthy is the generation of a large amount of irregular sheet-like waste material between the stacks and between the stack edges and material boundaries during the stamping of multiple circular rotor laminations onto strip material. This significantly reduces the material utilization rate of the silicon steel sheets, resulting in severe raw material waste. Secondly, during the stamping and stretching process of the casing, eddy currents are generated inside the metal casing due to electromagnetic induction, leading to a substantial accumulation of heat. This localized temperature rise adversely affects the mechanical and electromagnetic properties of the material, ultimately impacting the performance consistency and long-term reliability of the motor product.

[0004] Therefore, there is an urgent need in this field for an innovative motor structure and manufacturing solution that can integrate the manufacturing process, overcome the above-mentioned defects from the source, and in particular, significantly improve material utilization. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a method for integrally stamping the housing and rotor of an electric motor, as well as the electric motor itself, which has the advantages of reducing mold development costs, improving material utilization, and reducing eddy current heating.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This application provides a method for integrally stamping and manufacturing a motor housing and rotor. The technical solution is as follows: A method for integrally stamping and manufacturing a motor housing and rotor includes: using the same set of composite stamping dies to stamp the same strip material once to simultaneously stamp out annular housing laminations and rotor laminations located inside the housing laminations; separating the housing laminations and rotor laminations; stacking multiple housing laminations to form a housing portion; stacking multiple rotor laminations to form a rotor portion; and assembling the rotor portion into the interior of the housing portion.

[0007] This technical solution restructures the manufacturing process of the motor housing and rotor through an integrated stamping process. First, a single composite mold is used to simultaneously stamp a single strip, allowing the housing laminations and rotor laminations to be formed in one step. This eliminates the development and maintenance costs associated with two sets of molds in traditional processes, while also reducing waste from strip stamping and significantly improving material utilization. Second, the design of separating the housing and rotor laminations after stamping ensures their structural independence and avoids stress concentration and eddy current effects caused by multiple stretching processes in traditional housing manufacturing. The lamination process, by stacking and fixing the housing and rotor laminations, forms a housing and rotor section with stable electromagnetic properties. Finally, the rotor section is assembled into the housing, achieving structural integration. This solution, through process integration, fundamentally solves the problems of inefficiency and resource waste caused by discrete manufacturing.

[0008] Furthermore, this application also proposes that, in the synchronous stamping step, multiple ribs extending in the radial direction are synchronously stamped on the inner side of the annular inner wall of the housing lamination, the ribs being used to define magnetic tile receiving grooves for mounting magnetic tiles.

[0009] This technical solution achieves integrated manufacturing by simultaneously constructing the magnetic tile mounting structure during the casing lamination stage. Specifically, during the simultaneous stamping of the casing and rotor laminations, radially extending ribs are formed, particularly on the inner side of the casing's annular inner wall. These ribs, through their specific spatial arrangement, naturally form groove-like structures between adjacent ribs to accommodate the magnetic tiles. This simultaneous stamping process integrates the magnetic tile mounting structure with the casing body, avoiding the need for subsequent processing of the mounting grooves in traditional processes. The radially extending rib design not only precisely defines the installation position of the magnetic tiles, but its integral molding characteristic with the casing inner wall also enhances the overall structural strength. More importantly, this technology integrates the magnetic tile mounting structure forming process, which originally required multiple steps, into the casing lamination forming process through a single stamping action of a composite stamping die. This fundamentally solves the material waste problem caused by separate manufacturing, while the precise die design effectively controls the dimensional accuracy of the magnetic tile mounting grooves.

[0010] Furthermore, this application proposes that during the synchronous stamping of the ribs, the ribs defining the receiving slots of two adjacent magnetic tiles are made into two independent ribs with a gap between them. This allows each rib to independently deform to absorb the dimensional interference during assembly with the magnetic tile. The core of this technical solution lies in the dispersion and absorption of assembly stress through structural design optimization. First, the limiting ribs of adjacent magnetic tile receiving slots are designed as independent, separate individuals, rather than a continuous integral structure. This physical isolation allows each rib to have independent deformation space under stress. Second, the gap between the independent ribs provides a margin for local material deformation during the pressing of the magnetic tile, avoiding stress concentration caused by the overall rigidity of traditional continuous ribs. Through the above dual design, when there is dimensional interference between the magnetic tile and the receiving slot, each independent rib can be finely adjusted based on its own stress state, ensuring the positioning accuracy of the magnetic tile and effectively releasing assembly stress through local plastic deformation. This solves the installation difficulties or material damage problems caused by interference fit in traditional structures.

[0011] Furthermore, this application also proposes that, in the step of stacking multiple housing laminations, they be fixedly connected by riveting, welding or bonding.

[0012] Furthermore, this application also proposes to simultaneously punch out multiple rivet holes arranged circumferentially on the stamping machine housing during the stacking process.

[0013] Furthermore, this application also proposes that the strip material is silicon steel sheet strip.

[0014] Furthermore, this application proposes a step of installing magnetic tiles in the magnetic tile receiving slot, both before and after assembling the rotor into the housing. This technical solution locks the matching relationship between the magnetic tiles and the magnetic tile receiving slot at the final assembly stage by setting a magnetic tile installation step at the end of the assembly process. Since the magnetic tile receiving slot is a rib structure with independent deformation capability formed by synchronous stamping, installing the magnetic tiles after the housing and rotor are stacked and assembled can fully utilize the material deformation characteristics of the rib structure: on the one hand, the stamped magnetic tile receiving slot achieves precise radial positioning of the magnetic tiles; on the other hand, the gap design between the ribs allows each rib to independently generate minute deformations, thereby effectively absorbing dimensional tolerances during magnetic tile assembly and avoiding stress concentration caused by interference fits. This staged assembly strategy ensures the geometric accuracy of the magnetic tile installation and improves assembly reliability through a structural deformation compensation mechanism.

[0015] Furthermore, this application also proposes an electric motor, which is manufactured by the above-described manufacturing method.

[0016] As can be seen from the above, the method for integral stamping manufacturing of the housing and rotor of an electric motor provided in this application, as well as the electric motor itself, reduces the number of molds and material waste by using the same set of molds to simultaneously stamp the housing laminations and rotor laminations, while avoiding eddy current heating inside the housing. This method has the advantages of reducing mold development costs, improving material utilization, and reducing eddy current heating. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a ring-shaped housing lamination provided in this application.

[0018] Figure 2 This is a schematic diagram of a rotor lamination provided in this application.

[0019] Figure 3 A cross-sectional schematic diagram of an electric motor provided in this application.

[0020] Figure 4 This is a three-dimensional schematic diagram of an electric motor provided for this application. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless explicitly defined otherwise.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In existing technologies, the manufacturing of core components for micromotors typically requires the separate fabrication of the housing and rotor core laminations. Traditional processes use two independent dies to stamp silicon steel strips in stages, resulting in high die development and maintenance costs. The stamping of the rotor laminations generates a large amount of irregular scrap material, leading to low material utilization. Furthermore, the housing components undergo multiple stretching processes, creating continuous conductive loops within the metal material. During operation, this generates eddy currents, causing localized temperature rises and affecting the stability of motor performance.

[0027] To address the aforementioned issues, the resource waste and structural defects inherent in traditional discrete manufacturing processes have become industry pain points. There is a conflict between the number of molds and material utilization, and an inherent conflict exists between the housing forming process and electromagnetic performance. Analysis of the physical characteristics of the stamping process reveals the feasibility of simultaneously stamping different structural units. Nesting the housing and rotor laminations in the material arrangement reduces waste at the edges. Eliminating the multiple stretching processes of the housing and replacing them with a laminated structure blocks eddy current paths. Example

[0028] like Figure 1-4 As shown, this application proposes a method for integrally stamping the housing and rotor of an electric motor, including: using the same set of composite stamping dies to stamp the same strip once, simultaneously stamping out annular housing lamination 1 and rotor lamination 2 located inside it; separating the two and stacking them separately to form a housing part and a rotor part 20; and finally assembling the rotor part 20 into the housing part.

[0029] Among them, composite stamping dies refer to die systems that integrate multiple sets of punches, capable of simultaneously forming different shapes and structures in a single stroke. Specifically, this can be achieved by using regionally arranged blanking units, allowing the housing laminations 1 and rotor laminations 2 to form a nested arrangement on the strip. Synchronous stamping refers to the simultaneous action of each blanking unit on the strip during the die closing process, achieving simultaneous forming of different laminations. The separation step uses a mechanical sorting device to break down the nested laminations into independent units. The stacking process employs an axial stacking method, forming an integral structure through interlayer fixing.

[0030] Specifically, after the strip is fed into the composite mold, the annular housing lamination 1 and the inner rotor lamination 2 are formed simultaneously in a single stamping operation. The stamped nested laminations are then separated into independent units by an automated separation system, which are respectively fed into the housing lamination 1 stack and the rotor lamination 2 stack. The housing lamination 1 is continuously stacked to form a cylindrical structure with a set thickness, while the rotor lamination 2 is stacked to form a central shaft structure. During assembly, the rotor portion 20 is precisely aligned and installed into the internal cavity of the housing portion, forming the clearance fit required for electromagnetic action.

[0031] Compared to existing technologies, traditional processes require the alternating use of two sets of molds to stamp the housing and rotor components separately. This solution achieves process merging through mold integration. Traditional housing stretching and forming results in a continuous conductive layer within the material; this solution uses a laminated structure to cut off the eddy current path. Traditional rotor stamping generates annular waste areas; this solution uses a nested arrangement so that the rotor laminate 2 occupies the inner hole area of ​​the housing laminate 1, significantly improving material utilization. Through the above technical solutions, this application effectively reduces mold development and maintenance costs and reduces the generation of edge waste from silicon steel strips. The discrete laminated structure of the housing avoids the temperature rise problem caused by eddy current effects, improving the stability of motor operation. The integrated stamping process simplifies the production process, shortens the manufacturing cycle, and provides a new technical path for the efficient production of micromotors.

[0032] like Figure 1 and 3 As shown, in the synchronous stamping step, multiple radially extending ribs 3 are synchronously stamped on the inner side of the annular inner wall of the housing lamination 1. These ribs 3 define magnetic tile receiving grooves 4 for mounting the magnetic tiles. The synchronous stamping of multiple radially extending ribs 3 refers to the formation of multiple radially distributed protrusions on the inner side of the annular inner wall during the stamping process of the housing lamination 1, achieved through the cooperation of the die's punch and die. This structure serves as the positioning basis for the magnetic tile installation. The definition of the magnetic tile receiving groove 4 means that the gap area between two adjacent ribs 3 is constructed as a groove-shaped space to accommodate the magnetic tile. The annular inner wall of the housing lamination 1 serves as the bearing surface at the outer end of the groove, forming a three-dimensional positioning reference for the magnetic tile together with the ribs 3. The width of this groove-shaped space matches the thickness of the magnetic tile, and the assembly accuracy of the magnetic tile is achieved through precise dimensional control of the die.

[0033] Specifically, in a single stamping action of the composite stamping die, the die simultaneously forms the annular main body of the housing laminate 1 and radial ribs 3 on the strip. The extension direction of the ribs 3 is perpendicular to the central axis of the housing laminate 1, and the spacing between adjacent ribs 3 is predetermined by the cavity size of the die. During the stamping process, the plastic deformation of the strip causes the ribs 3 and the housing laminate 1 to form an integral structure, eliminating the need for subsequent secondary processing. When the magnetic tile is pressed into the receiving groove between adjacent ribs 3, the sidewall of the rib 3 provides circumferential restraint to the magnetic tile, while the root of the rib 3 and the connection point with the housing laminate 1 have sufficient structural strength to resist the stress during magnetic tile assembly. Through the above technical solution, this application achieves the integrated molding of the magnetic tile mounting structure and the housing laminate 1, solving the problems of low material utilization and eddy current heating caused by the lack of a magnetic tile mounting structure in traditional split stamping processes, while ensuring the accuracy of the magnetic tile mounting position and structural stability.

[0034] In the detailed scheme, when the ribs 3 are stamped out synchronously, the ribs 3 of two adjacent magnetic tile receiving slots 4 are defined as two independent ribs 3, and there is a gap 5 between the two independent ribs 3. This allows each rib 3 to independently deform to absorb the dimensional interference when assembling with the magnetic tile. The independent rib 3 refers to the limiting structure between adjacent magnetic tile receiving slots 4, which is composed of two unconnected stamped bodies. Specifically, this can be achieved by using a split-type stamping process with separate punch structures on the mold, forming independent force-bearing units through physical isolation. The gap 5 refers to the space reserved between adjacent independent ribs 3, which can be achieved by adjusting the punch spacing of the mold or by setting a partition structure, providing space allowance for material deformation.

[0035] Specifically, during the stamping process, the punch array of the die is configured to be spaced apart on the annular inner wall, with a gap 5 area maintained between adjacent punches. When the strip is stamped, each punch independently forms a corresponding rib 3 structure, and a gap 5 naturally forms between adjacent ribs 3. During the pressing of the magnetic tile, when there is a dimensional interference between the magnetic tile and the receiving groove, the independent ribs 3 can undergo local plastic deformation based on their own stress state. The gap 5 area allows the ribs 3 to deform to both sides, thereby dispersing the assembly stress. Compared with the overall rigid constraint of traditional continuous ribs, the local deformation capability of the independent ribs 3 can avoid material cracking or magnetic tile positioning deviation caused by stress concentration. This solution, through the synergistic effect of the split ribs 3 and the gap 5, makes each rib 3 an independent deformation unit, achieving stress dispersion while ensuring positioning accuracy. Based on the above solution, on the one hand, it avoids magnetic tile breakage or housing deformation caused by interference assembly; on the other hand, it also avoids the probability of loose fit when the magnetic tile size fluctuates.

[0036] In the step of stacking multiple housing laminations 1, they are fixedly connected by riveting, welding, or bonding. Riveting refers to achieving physical locking between the laminations through mechanical connection. Specifically, this can be achieved by stamping to form riveting holes 6 and pressing them together, avoiding the impact of welding heat deformation on the electromagnetic properties of the material, while improving the shear resistance of the connection structure. Welding refers to forming a metallurgical bond by melting materials. Specifically, this can be achieved by laser welding or resistance welding, eliminating contact gaps between the laminations, enhancing the overall rigidity of the housing, and reducing electromagnetic losses. Bonding refers to filling the microscopic unevenness on the surface of the laminations with adhesives. Specifically, this can be achieved by using epoxy resin or acrylic adhesives, achieving uniform stress distribution while avoiding localized material embrittlement. Specifically, during the lamination process of the lamination machine housing 1, when riveting is used, the riveting holes 6 pre-punched on the lamination surface undergo plastic deformation through a pressing process, forming a mechanically interlocking structure; when welding is used, the contact surfaces of the laminations undergo localized melting under the action of a heat source, and after cooling, a continuous metallurgical bonding layer is formed; when adhesive is used, the adhesive applied between the laminations cures to form a uniform adhesive layer. The three connection methods can be selected according to material thickness, production cycle, and electromagnetic performance requirements. For example, riveting can be used for thin silicon steel sheets to avoid heat-affected zones, while welding can be used to enhance overall rigidity for high-rigidity applications.

[0037] In this specific implementation, multiple housing laminations 1 are stacked using a riveting method. During the stamping of the housing laminations 1, multiple circumferentially arranged riveting holes 6 are simultaneously punched onto them. The simultaneous punching of the riveting holes 6 means that during the stamping process of the housing laminations 1, the shape and hole positions of the laminations are processed in one go using the same set of die-cutting structures. Specifically, this can be achieved by using a punch and die in a composite stamping die. This feature integrates the hole-forming process into the lamination stamping stage, avoiding positioning errors caused by step-by-step processing. The circumferentially arranged riveting holes 6 refer to multiple holes evenly distributed along the annular structure of the housing laminations 1, which can be achieved using an array arrangement with equal angular intervals. This feature ensures uniform stress on each lamination during the stacking process through symmetrical layout, while also providing a precise assembly reference for subsequent riveting processes.

[0038] Specifically, when the composite stamping die stamps the strip, the punching structure in the die simultaneously forms the riveting holes 6. By combining the processing of the riveting holes 6 with the stacking stamping into a single process, the extra operation of drilling or punching holes separately after stacking, which is required in traditional processes, is eliminated. The circumferentially arranged hole design allows for direct alignment and positioning during stacking, eliminating the need for secondary adjustments. The high precision of the stamping process ensures the consistency of the holes in each stack, thereby avoiding riveting failure or assembly difficulties caused by hole position deviations.

[0039] In the specific design, the strip material is silicon steel sheet strip. Silicon steel sheet strip refers to a continuous strip material made of cold-rolled electrical steel with a high silicon content. Its high resistivity suppresses eddy currents generated in an alternating magnetic field, effectively reducing eddy current losses in the housing lamination 1 region during stamping. Magnetic permeability anisotropy refers to the difference in magnetization characteristics between the rolling direction and the perpendicular direction. This characteristic allows the rotor lamination 2 to maintain magnetic circuit efficiency in a rotating magnetic field. Simultaneously, the housing lamination 1 reduces its permeability anisotropy by adjusting the stamping direction, thus balancing structural strength and electromagnetic interference. Specifically, when a single silicon steel sheet strip is used to simultaneously stamp the housing lamination 1 and rotor lamination 2, the consistency of material physical properties eliminates the electromagnetic parameter differences caused by using low-carbon steel for the housing and silicon steel sheets for the rotor in traditional processes. The high resistivity of the strip blocks the eddy current path generated in the housing lamination 1 in an alternating magnetic field, preventing material performance degradation caused by localized temperature rise. During the stamping process, the anisotropic characteristics of the strip's magnetic permeability are utilized in a targeted manner: the rotor laminations 2 are arranged along the rolling direction to adapt to the requirements of the rotating magnetic field, while the housing laminations 1 reduce the anisotropic effect by changing the stamping angle, ensuring structural rigidity. Material uniformity regularizes the shape of the blanking scrap, and the contours of adjacent laminations form a complementary arrangement, reducing ineffective areas at the edges of the strip.

[0040] In a further embodiment, before and after assembling the rotor section 20 into the housing section, a step of installing magnets in the magnet receiving groove 4 is included. The magnet receiving groove 4 refers to a groove-shaped structure formed by synchronous stamping to accommodate the magnets. Specifically, it can be implemented using a rib structure 3 with independent deformation capability. The gap 5 between the ribs 3 allows for independent deformation to absorb assembly tolerances. The phased assembly strategy refers to placing the magnet installation step after the housing and rotor are completed in a stacked assembly. This can be achieved by adjusting the assembly sequence, utilizing the geometric features of the already formed magnet receiving groove 4 for magnet positioning.

[0041] Specifically, after the housing and rotor are integrally stamped and stacked, the rib 3 structure of the magnetic tile receiving groove 4 has formed a stable geometric profile. During magnetic tile installation, the radial position of the magnetic tile is directly positioned by the groove defined by the rib 3, and the gap 5 between the ribs 3 allows each rib 3 to undergo independent elastic deformation during the pressing process. This deformation mechanism adaptively compensates for dimensional deviations between the magnetic tile and the receiving groove, avoiding localized stress concentration caused by interference fits. Simultaneously, since the magnetic tile installation occurs during the final assembly stage of the housing and rotor, interference between the magnetic tile and the laminated structure during the stacking process is avoided, ensuring the integrity of the interlayer connections. Example

[0042] This embodiment proposes an electric motor manufactured by the method described in Embodiment 1. The manufacturing method includes using the same set of composite stamping dies to stamp the same strip material once to simultaneously stamp out annular housing laminations 1 and rotor laminations 2 located inside the housing laminations 1. The housing laminations 1 and rotor laminations 2 are then separated, and multiple housing laminations 1 are stacked to form a housing section. Multiple rotor laminations 2 are stacked to form a rotor section 20, and the rotor section 20 is assembled into the interior of the housing section. Through the above technical solution, this application solves the problems of low material utilization and high mold cost caused by traditional split manufacturing processes, and avoids eddy current heating caused by the housing stretching process. The composite stamping process achieves synchronous forming of the housing and rotor laminations, reducing the number of stamping processes and molds, and lowering production costs. The nested lamination arrangement design improves strip material utilization and reduces raw material waste. The independent rib structure 3 on the housing laminations 1 compensates for dimensional deviations through elastic deformation during magnetic tile assembly, improving the magnetic circuit assembly accuracy and operational stability.

[0043] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A method for integrally stamping and manufacturing the housing and rotor of an electric motor, characterized in that, include: The same set of composite stamping dies is used to stamp the same strip once, so as to simultaneously stamp out the annular housing lamination (1) and the rotor lamination (2) located inside the housing lamination (1). Separate the housing laminations (1) from the rotor laminations (2); Multiple housing laminations (1) are stacked to form a housing section; Multiple rotor laminations (2) are stacked to form a rotor section (20); The rotor (20) is assembled into the interior of the housing.

2. The method for integrally stamping and manufacturing the motor housing and rotor according to claim 1, characterized in that, In the synchronous stamping step, multiple ribs (3) extending radially are synchronously stamped on the inner side of the annular inner wall of the housing lamination (1), and the ribs (3) are used to define magnetic tile receiving grooves (4) for mounting magnetic tiles.

3. The method for integrally stamping the motor housing and rotor according to claim 2, characterized in that, When the ribs (3) are stamped out synchronously, the ribs (3) that define the adjacent magnetic tile receiving grooves (4) are two independent ribs (3), and there is a gap (5) between the two independent ribs (3), so that each rib (3) can independently generate material deformation to absorb the dimensional interference when assembling with the magnetic tile.

4. The method for integrally stamping the motor housing and rotor according to claim 1, characterized in that, In the step of stacking multiple housing laminations (1), they are fixedly connected by riveting, welding or bonding.

5. The method for integrally stamping and manufacturing the motor housing and rotor according to claim 4, characterized in that, When stamping the housing laminations (1), multiple rivet holes (6) arranged circumferentially are simultaneously punched out on them.

6. The method for integrally stamping the motor housing and rotor according to claim 1, characterized in that, The strip is a silicon steel sheet strip.

7. The method for integrally stamping the housing and rotor of an electric motor according to any one of claims 1 to 6, characterized in that, It also includes the step of installing the magnetic tile in the magnetic tile receiving groove (4).

8. An electric motor, characterized in that, The motor is manufactured by the manufacturing method according to any one of claims 1 to 7.

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