Molding die and motor core
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2026-08-11
AI Technical Summary
[0019]本实用新型提供的成型模具和电机铁芯，有益效果包括：
Smart Images
Figure CN224614886U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor core forming mold technology, and in particular to a forming mold and a motor core. Background Technology
[0002] The motor core comprises multiple metal sheets, each stamped with a riveting groove. Each sheet has a groove on one side and a protrusion on the other. When multiple sheets are stacked, the protrusion of one sheet inserts into the groove of another, achieving a riveting connection. Due to different specifications and models of the core products, the number and thickness of the stacked metal sheets vary. Stop metal sheets are needed to prevent further stacking or to act as separators during stacking. Therefore, the production process requires at least two types of metal sheets: one for stacking and another for separation. Different shapes of riveting positions need to be stamped on these two types of metal sheets.
[0003] In existing production processes, different riveting fasteners require processing at different stamping stations using different stamping dies. During the stamping process, the cumulative errors and overall precision of different dies lead to positional deviations between the core penetration point and the riveting point, resulting in poor assembly consistency and large gap errors between the assembled components. This results in poor motor performance and affects product quality. Utility Model Content
[0004] The purpose of this invention is to provide a molding die and a motor core, which can help improve positioning accuracy, reduce cumulative errors, and improve assembly consistency.
[0005] In a first aspect, this utility model provides a molding die, comprising:
[0006] A forming punch, the forming punch including a first punch and a second punch connected to the axial end of the first punch; the projection of the second punch onto the end face of the first punch falls completely onto the end face of the first punch;
[0007] A limiting plate is provided with a first abutting surface and a second abutting surface located at different heights; the limiting plate can move relative to the forming punch so that the forming punch abuts against the first abutting surface or the second abutting surface;
[0008] The limiting plate is located on the side of the first punch away from the second punch; when the end of the forming punch away from the second punch abuts against the first abutting surface, the contact stroke of the forming punch with the part to be punched is less than or equal to the length of the second punch, and the second punch is used to punch the part to be punched; when the end of the forming punch away from the second punch abuts against the second abutting surface, the contact stroke of the forming punch with the part to be punched is greater than the length of the second punch, the second punch passes through the part to be punched, and the first punch is used to punch the part to be punched.
[0009] In an optional embodiment, the limiting plate has a groove on the side facing the first punch, and the bottom of the groove serves as the first abutting surface; the surface of the limiting plate that is flush with the opening of the groove serves as the second abutting surface.
[0010] In an optional embodiment, the first punch has a stamping depth of H1 on the part to be stamped, and the second punch has a stamping depth of H2 on the part to be stamped, where H1 is greater than H2; H2 is less than or equal to the length of the second punch, and H1 is greater than the length of the second punch, and the depth of the groove is greater than or equal to the difference between H1 and H2.
[0011] In an optional embodiment, the forming punch further includes a connecting rod connected to the end of the first punch away from the second punch; the end of the connecting rod away from the first punch abuts against the first abutting surface or the second abutting surface.
[0012] In an optional embodiment, the first punch has a rectangular cross-section, and the second punch has a V-shaped cross-section.
[0013] In an optional embodiment, a driving member is further included, which is connected to the limiting plate to drive the limiting plate to move relative to the forming punch.
[0014] In an optional embodiment, the moving direction of the limiting plate is perpendicular to the axial direction of the forming punch.
[0015] In an optional embodiment, a punch retainer is also included; the forming punch is movable relative to the punch retainer along the axial direction of the forming punch.
[0016] In an optional embodiment, an adjusting washer is further included, the adjusting washer being disposed between the forming punch and the punch fixing frame.
[0017] In an optional embodiment, a stripper plate is also included, which is located at the end of the forming punch away from the limiting plate.
[0018] Secondly, this utility model embodiment provides a motor core, comprising multiple stacked metal sheets, each of which is a part to be stamped, and the metal sheets are stamped using the aforementioned forming mold.
[0019] The molding die and motor core provided by this utility model have the following advantages:
[0020] The forming mold provided in this embodiment integrates a first punch and a second punch with different cross-sections into one mold. By controlling the axial stroke of the punch, the first punch or the second punch can stamp parts, forming two different shapes of riveting fasteners in the same stamping station. This reduces the number of mold stations and can reduce the cumulative error and positioning deviation of the mold. The stamped products have better uniformity, which can improve assembly consistency. Furthermore, it reduces the switching and transfer of parts between different stations, which is beneficial to improving processing efficiency.
[0021] The motor core provided in this embodiment uses the above-mentioned forming mold to stamp different riveting positions on the metal sheet, which improves the concentricity between the stop position of the motor core and the forming position, reduces the positional deviation between the riveting point and the core, improves assembly consistency, and enhances product quality. Attached Figure Description
[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1 A schematic diagram of the first working condition of the molding die provided in this embodiment of the utility model;
[0024] Figure 2 A schematic diagram of the second working condition of the molding die provided in this embodiment of the utility model;
[0025] Figure 3 A schematic diagram of the connection structure between the limiting plate and the forming punch for the first working condition of the forming mold provided in this embodiment of the utility model;
[0026] Figure 4 A schematic diagram of the connection structure between the limiting plate and the forming punch for the second working condition of the forming mold provided in this embodiment of the utility model;
[0027] Figure 5 A partially enlarged schematic diagram of the connection structure between the first punch and the second punch of the molding die provided in this embodiment of the utility model;
[0028] Figure 6 A schematic diagram of the structure of the first punch and the second punch of the molding die provided in this embodiment of the utility model for stamping and forming products stacked together;
[0029] Figure 7 This is a schematic diagram of the metal sheet structure of a motor core manufactured using the molding die provided in this embodiment of the invention.
[0030] Icons: 100-Forming mold; 110-Forming punch; 111-First punch; 112-Second punch; 113-Connecting rod; 120-Limiting plate; 121-First abutting surface; 122-Second abutting surface; 123-Groove; 124-Cover plate; 130-Driver; 141-Upper mold base; 142-Punch fixing frame; 143-Backing plate; 144-Adjusting washer; 145-Ejector plate; 146-Ejector seat; 210-First loose piece; 211-Rectangular through hole; 220-Second loose piece; 221-V-shaped recess. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0035] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 utility model based on the specific circumstances.
[0037] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0038] Please combine Figures 1 to 4 This utility model provides a forming mold 100 that can stamp out riveting fasteners of different shapes at the same workstation, which is highly efficient, low-cost, reduces the number of molds and workstations, and improves positioning accuracy and assembly consistency. This forming mold 100 can be used for stamping metal sheets in motor cores, as well as for stamping in other fields or products.
[0039] The forming die 100 includes a forming punch 110 and a limiting plate 120. The forming punch 110 includes a first punch 111 and a second punch 112 connected to the axial end of the first punch 111; the projection of the second punch 112 onto the end face of the first punch 111 completely falls within the end face of the first punch 111. The limiting plate 120 is provided with a first abutting surface 121 and a second abutting surface 122 located at different heights; the limiting plate 120 is movable relative to the forming punch 110 so that the forming punch 110 abuts against the first abutting surface 121 or the second abutting surface 122. The limiting plate 120 is located on the side of the first punch 111 away from the second punch 112. When the end of the forming punch 110 away from the second punch 112 abuts against the first abutting surface 121, the contact stroke of the forming punch 110 with the part to be punched is less than or equal to the length of the second punch 112, and the second punch 112 is used to punch the part to be punched. When the end of the forming punch 110 away from the second punch 112 abuts against the second abutting surface 122, the contact stroke of the forming punch 110 with the part to be punched is greater than the length of the second punch 112. The second punch 112 passes through the part to be punched, and the first punch 111 is used to stamp the part to be punched. This forming die 100 has high processing efficiency and precise positioning, which helps to reduce the cumulative error of the die. It also results in a small product positioning error, which helps to improve the concentricity between the stop position and the forming position of the motor core, resulting in high assembly accuracy and improved product quality.
[0040] It is worth noting that the contact stroke between the forming punch 110 and the part to be punched can be understood as: the displacement of the forming punch 110 moving downward during the downward punching process, from the moment the forming punch 110 contacts the part to be punched until the forming punch 110 finishes punching the part to be punched.
[0041] In this embodiment, the projected area of the second punch 112 on the end face of the first punch 111 is less than or equal to the area of the end face of the first punch 111.
[0042] It should be noted that in this embodiment, when the forming punch 110 abuts against the second abutting surface 122, the riveting fastener formed by stamping on the part to be stamped is a through hole structure. In fact, during the stamping process, both the first punch 111 and the second punch 112 are in contact with the part to be stamped, but the cross-sectional area of the first punch 111 is larger than that of the second punch 112, so that a through hole with the same cross-sectional shape as the first punch 111 is finally formed on the part to be stamped.
[0043] Optionally, the surface of the limiting plate 120 is provided with a groove 123 to form a first abutting surface 121 and a second abutting surface 122. In this embodiment, a structure with one groove 123 is shown. The limiting plate 120 has a groove 123 on the side facing the first punch 111, and the bottom of the groove 123 serves as the first abutting surface 121; the surface of the limiting plate 120 that is flush with the opening of the groove 123 serves as the second abutting surface 122.
[0044] Combination Figure 5 and Figure 6 It can be understood that the stamping depth of the first punch 111 on the part to be stamped is H1, and the stamping depth of the second punch 112 on the part to be stamped is H2, where H1 is greater than H2; the depth of the groove 123 is greater than or equal to the difference between H1 and H2. Among these, H2 is less than or equal to the length of the second punch 112, and H1 is greater than the length of the second punch 112.
[0045] Optionally, the forming punch 110 further includes a connecting rod 113, which is connected to the end of the first punch 111 away from the second punch 112; the end of the connecting rod 113 away from the first punch 111 abuts against the first abutting surface 121 or the second abutting surface 122. The length of the connecting rod 113 is designed according to the distance between the first punch 111 and the limiting plate 120.
[0046] In this embodiment, the first punch 111 has a rectangular cross-section, and the second punch 112 has a V-shaped cross-section. When the first punch 111 acts on the part to be punched, it forms a rectangular through hole 211 on the part. When the second punch 112 acts on the part to be punched, it forms a V-shaped recess 221 on the part. It is easy to understand that after being punched by the second punch 112, the part has a recess on one side and a corresponding protruding snap-fit on the other side. After multiple such parts are stacked, the protruding snap-fit can be inserted into the recess snap-fit to achieve automatic engagement and positioning. If the part punched by the first punch 111 is defined as the first piece 210, and the part punched by the second punch 112 is defined as the second piece 220, the first piece 210 has a rectangular through hole 211, and the second piece 220 has a V-shaped recess 221. When stacking individual components, if 20 second individual components 220 need to be stacked as a group according to product requirements, the first layer of the stack uses the first individual component 210, and the second layer uses the second individual component 220. The V-shaped protrusion on one side of the second individual component 220 is inserted into the rectangular through hole 211 of the first individual component 210 to achieve a locking mechanism. The second to 21st layers each use the second individual component 220. The adjacent V-shaped recesses 221 and V-shaped protrusions of the 20 second individual components 220 automatically lock and position themselves, completing a product stack. The number of second individual components 220 stacked can be designed according to product requirements, and can be 30, 50, 100, or any other arbitrary value. No specific limitation is made here.
[0047] In some embodiments, the cross-sectional shape and size of the first punch 111 and the second punch 112 are not limited and can be flexibly set as needed. For example, they include, but are not limited to, triangles, rhombuses, squares, pentagons, hexagons, octagons, circles, ellipses, crescents, waves or other arbitrary shapes. No specific limitation is made here.
[0048] Optionally, the forming mold 100 further includes a driving component 130, which is connected to a limiting plate 120 to drive the limiting plate 120 to move relative to the forming punch 110. In this embodiment, the driving component 130 is a cylinder, which drives the limiting plate 120 to translate. The moving direction of the limiting plate 120 is perpendicular to the punching direction of the first punch 111. The punching direction of the first punch 111 is along the axial direction of the first punch 111, and the punching direction of the second punch 112 is consistent with the punching direction of the first punch 111. By controlling the stroke and reciprocating movement of the cylinder, it can be ensured that the working surface of the limiting plate 120 switches between the first abutment surface 121 and the second abutment surface 122. In other words, when the first punch 111 needs to work, the positions of the first punch 111 and the second abutment surface 122 correspond, that is, the connecting rod 113 abuts against the plane outside the groove 123, at which time the rectangular through hole 211 structure can be punched out. If the second punch 112 is required to work, the positions of the first punch 111 and the first abutting surface 121 are aligned, that is, the connecting rod 113 abuts against the bottom of the groove 123, and the V-shaped recess 221 structure can be punched out.
[0049] In some embodiments, the drive element 130 may also be a motor or electric motor.
[0050] It should be understood that when the connecting rod 113 is abutting at the groove 123, the contact stroke between the forming punch 110 and the part to be punched is smaller. When the connecting rod 113 is abutting at a position outside the groove 123, the contact stroke between the forming punch 110 and the part to be punched is larger. The difference in stroke between the two cases is the depth of the groove 123. When the connecting rod 113 is abutting at a position outside the groove 123, during the stamping process, the second punch 112 passes through the part to be punched, and the first punch 111 punches the part to be punched, resulting in a rectangular through hole 211 on the part to be punched that is consistent with the cross-section of the first punch 111. Correspondingly, when the connecting rod 113 is abutting at the groove 123, the first punch 111 cannot contact the part to be punched, and only the second punch 112 punches the part to be punched, thus forming a V-shaped recess 221 on the part to be punched that is consistent with the cross-section of the second punch 112.
[0051] Optionally, the forming die 100 further includes an upper die base 141, a punch holder 142, and a backing plate 143. The upper die base 141 is used to mount the drive component 130 and the punch holder 142. The limiting plate 120 can move within the upper die base 141. The forming punch 110 can move relative to the punch holder 142 along the axial direction of the forming punch 110. The axial direction of the forming punch 110 is the same as the axial direction of the first punch 111. The punch holder 142 serves as a stamping guide for the first punch 111. The backing plate 143 is disposed between the punch holder 142 and the upper die base 141, serving as a buffer, guide, and shock absorber.
[0052] Optionally, the forming die 100 further includes an adjusting washer 144, which is disposed between the forming punch 110 and the punch holder 142. In this embodiment, the adjusting washer 144 is disposed between the upper die holder 141 and the first punch 111, and can be used to adjust the stamping stroke to adapt to different stamping depths.
[0053] Optionally, the upper mold base 141 is also provided with a cover plate 124, which is connected to the limiting plate 120. The limiting plate 120 can move relative to the cover plate 124. Optionally, the cover plate 124 is provided with a slide rail, and the limiting plate 120 moves along the slide rail to improve the movement accuracy.
[0054] Optionally, the forming die 100 also includes a stripper plate 145 and a stripper seat 146. The stripper seat 146 is used to install the stripper plate 145, which is located at the end of the forming punch 110 away from the limiting plate 120. The stripper plate 145 serves to buffer, dampen, guide, protect the punch, and facilitate separation from the part to be punched.
[0055] Combination Figure 7 This utility model embodiment provides a motor core, comprising multiple stacked metal sheets, each metal sheet being a stamping part, formed using the aforementioned forming mold 100. The metal sheets include a first loose sheet 210 and a second loose sheet 220. The first loose sheet 210 is formed using a first punch 111, and the second loose sheet 220 is formed using a second punch 112. During stacking, the first loose sheet 210 acts as a stop and partition, while the second loose sheets 220 are stacked and positioned using V-shaped recesses 221 and V-shaped protrusions. Furthermore, the V-shaped protrusion of the second loose sheet 220 adjacent to the first loose sheet 210 is inserted into the rectangular through-hole 211 of the first loose sheet 210.
[0056] The molding die 100 and motor core provided by this utility model have the following beneficial effects, including:
[0057] The forming mold 100 provided in this embodiment integrates a first punch 111 and a second punch 112 with different cross-sections into one mold. By controlling the contact stroke between the punch and the part to be punched, either the first punch 111 or the second punch 112 can stamp the part. Two different shapes of riveting fasteners can be formed in the same stamping station, reducing the number of mold stations and lowering the cumulative error and positioning deviation of the mold. The stamped products have better uniformity, which can improve assembly consistency. Furthermore, it reduces the switching and transfer of parts between different stations, which is beneficial to improving processing efficiency.
[0058] The motor core provided in this embodiment uses the above-mentioned forming mold 100 to stamp different riveting positions on the metal sheet, which improves the concentricity between the through-piece stop position and the forming position of the motor core, reduces the positional deviation between the riveting point and the stop through-piece of the core, improves assembly consistency, reduces the gap error after assembly, and improves product quality.
[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of this utility model.
Claims
1. A molding die, characterized in that, include: A forming punch (110) includes a first punch (111) and a second punch (112) connected to the axial end of the first punch (111); the projection of the second punch (112) on the end face of the first punch (111) falls completely onto the end face of the first punch (111). A limiting plate (120) is provided with a first abutting surface (121) and a second abutting surface (122) located at different height planes; the limiting plate (120) can move relative to the forming punch (110) so that the forming punch (110) abuts against the first abutting surface (121) or the second abutting surface (122); The limiting plate (120) is located on the side of the first punch (111) away from the second punch (112); when the end of the forming punch (110) away from the second punch (112) abuts against the first abutting surface (121), the contact stroke of the forming punch (110) with the part to be punched is less than or equal to the length of the second punch (112), and the second punch (112) is used to punch the part to be punched; when the end of the forming punch (110) away from the second punch (112) abuts against the second abutting surface (122), the contact stroke of the forming punch (110) with the part to be punched is greater than the length of the second punch (112), and the second punch (112) passes through the part to be punched, and the first punch (111) is used to punch the part to be punched.
2. The molding die according to claim 1, characterized in that, The limiting plate (120) has a groove (123) on the side facing the first punch (111), and the bottom of the groove (123) serves as the first abutting surface (121); the surface of the limiting plate (120) that is flush with the opening of the groove (123) serves as the second abutting surface (122).
3. The molding die according to claim 2, characterized in that, The first punch (111) has a punching depth of H1 on the part to be punched, and the second punch (112) has a punching depth of H2 on the part to be punched. H1 is greater than H2; H2 is less than or equal to the length of the second punch (112), and H1 is greater than the length of the second punch (112). The depth of the groove (123) is greater than or equal to the difference between H1 and H2.
4. The molding die according to claim 1, characterized in that, The forming punch (110) further includes a connecting rod (113), which is connected to the end of the first punch (111) away from the second punch (112); the end of the connecting rod (113) away from the first punch (111) abuts against the first abutting surface (121) or the second abutting surface (122).
5. The molding die according to claim 1, characterized in that, The first punch (111) has a rectangular cross-section, and the second punch (112) has a V-shaped cross-section.
6. The molding die according to claim 1, characterized in that, It also includes a driving component (130) connected to the limiting plate (120) to drive the limiting plate (120) to move relative to the forming punch (110).
7. The molding die according to claim 1, characterized in that, The moving direction of the limiting plate (120) is perpendicular to the axial direction of the forming punch (110).
8. The molding die according to any one of claims 1 to 7, characterized in that, It also includes a punch holder (142); the forming punch (110) is movable relative to the punch holder (142) along the axial direction of the forming punch (110).
9. The molding die according to claim 8, characterized in that, It also includes an adjusting washer (144), which is disposed between the forming punch (110) and the punch holder (142).
10. A motor core, characterized in that, It comprises multiple stacked metal sheets, each of which is a part to be stamped, and the metal sheets are stamped using a forming die as described in any one of claims 1 to 9.