Tool for pressing and welding stator and rotor punching sheets
By designing a tooling that includes a base, a mold core, and a buffer device, and using springs for force transmission and limit control, the problem of improper lower pressure control during the clamping process of motor stator and rotor laminations was solved, thus improving the welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG SHUNDE AISHUN ELECTROMECHANICAL TECH CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-05-19
AI Technical Summary
In the existing technology, it is difficult to control the downward pressure during the pressing process of motor stator and rotor laminations, which leads to excessive pressing between laminations, resulting in quality problems such as cracks and affecting the welding quality.
The tooling design includes a base, a mold core, and a buffer device. It uses springs to transmit force and the cooperation of the first and second lower pressure plates to buffer the downward pressure, preventing the stamping from being over-pressed. The downward pressure is further controlled by the limit block and the mounting column.
It effectively prevents excessive lamination, improves welding quality, and ensures the quality of stator and rotor use.
Smart Images
Figure CN224254592U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a tooling for processing stator and rotor laminations, and more particularly to a tooling for pressing and welding stator and rotor laminations. Background Technology
[0002] During the production of an electric motor stator and rotor, laminations are first stamped one by one. After forming, the laminations are stacked on a die core. After stacking to a certain height and quantity, they are welded on a corresponding welding machine. During welding, the entire stack of laminations is pressed together before welding to form the motor stator or corresponding rotor. However, when existing laminations are pressed on a machine tool, the downward pressure is difficult to control. This can lead to excessive compression between the laminations, causing internal cracks and other defects, thus affecting the quality of the laminations. Consequently, the final welded stator and rotor may have poor quality, impacting their usability. Utility Model Content
[0003] The purpose of this utility model is to provide a tooling for pressing and welding stator and rotor laminations that can solve at least one of the above problems.
[0004] According to one aspect of the present invention, a tooling for pressing and welding stator and rotor laminations is provided, comprising a base, a mold core, and a buffer device. The mold core is disposed on the base, and the buffer device comprises a first lower pressure plate, a second lower pressure plate, and a spring. The first lower pressure plate is located below the second lower pressure plate and is sleeved on the outside of the mold core. The second lower pressure plate is located above the mold core, and the inner diameter of the second lower pressure plate is smaller than the outer diameter of the mold core. The spring is located between the first lower pressure plate and the second lower pressure plate, and both ends of the spring abut against the first lower pressure plate and the second lower pressure plate, respectively.
[0005] The beneficial effects of this utility model are as follows: By providing a buffer device, after the stator or rotor laminations are stacked on the die core to the appropriate number and height, the first lower pressure plate is sleeved on the die core and presses against the stator or rotor laminations. Therefore, when an external force presses downward, it acts on the second lower pressure plate, which in turn acts downward on the spring. The spring then transmits the force to the first lower pressure plate, causing the first lower pressure plate to press the stator or rotor laminations downward. By providing a spring, the downward pressing force can be buffered, avoiding excessive force acting on the laminations and effectively preventing over-pressing of the laminations, thus protecting the laminations and improving the quality of the final welded stator.
[0006] In some embodiments, a tooling for pressing and welding stator and rotor laminations further includes a limiting block located between a first lower pressure plate and a second lower pressure plate. Thus, by providing the limiting block, the distance between the first and second lower pressure plates can be limited, preventing excessive downward pressure from the second lower pressure plate and thereby preventing excessive downward force.
[0007] In some embodiments, the buffer device further includes a mounting post, one end of which is fixed to a first lower pressure plate, and the other end of which can pass through a second lower pressure plate, with the spring sleeved on the mounting post. Thus, by providing a mounting post, the positioning and installation of the spring is facilitated.
[0008] In some embodiments, multiple springs are evenly distributed around the outer periphery of the mold core, and multiple mounting posts correspond to multiple springs. Therefore, the number of springs can be increased or decreased according to the required clamping force between the laminations to meet different usage requirements.
[0009] In some embodiments, a tooling for pressing and welding stator and rotor laminations further includes a baffle plate disposed on a base and sleeved on the outside of the die core. The baffle plate is provided with a boss. Thus, the boss can limit and support the laminations, facilitating the stacking of the laminations on the outside of the die core.
[0010] In some embodiments, the outer diameter of the boss is smaller than the outer diameter of the baffle, and the outer diameter of the boss is the same as the outer diameter of the first lower pressure plate. This facilitates the uniform application of the boss and the first lower pressure plate to the lamination, ensuring that the downward pressure is evenly transmitted to the lamination.
[0011] In some embodiments, the outer periphery of the first lower pressure plate is provided with a plurality of first vertical grooves, which extend from the upper end face of the first lower pressure plate to the lower end face of the first lower pressure plate. Thus, by providing the first vertical grooves, it is convenient to clear the corresponding positions of the welding points of the laminations, forming clearance positions.
[0012] In some embodiments, the outer periphery of the boss is provided with multiple second vertical grooves, which correspond to the first vertical grooves. Thus, by providing the second vertical grooves, it is convenient to create clearance spaces at the corresponding positions of the welding points of the lamination. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of a tooling for pressing and welding stator and rotor laminations according to the present invention.
[0014] Figure 2 This is a schematic diagram of the stator lamination structure. Detailed Implementation
[0015] The present invention will now be described in further detail with reference to the accompanying drawings.
[0016] Reference Figure 1A fixture for pressing and welding stator and rotor laminations includes a base 1, a mold core 2, and a buffer device 3. The mold core 2 is disposed on the base 1. The buffer device 3 includes a first lower pressure plate 31, a second lower pressure plate 32, and a spring 33. The first lower pressure plate 31 is located below the second lower pressure plate 32 and is sleeved on the outside of the mold core 2. The second lower pressure plate 32 is located above the mold core 2, and the inner diameter of the second lower pressure plate 32 is smaller than the outer diameter of the mold core 2. The spring 33 is located between the first lower pressure plate 31 and the second lower pressure plate 32, and both ends of the spring 33 abut against the first lower pressure plate 31 and the second lower pressure plate 32, respectively.
[0017] During assembly, the mold core 2 is fitted onto the base 1, and the base 1 allows the entire fixture to be mounted and fixed on the stamping and welding equipment. In use, the stator laminations (such as...) are... Figure 2 As shown, the stator or rotor laminations are stacked one by one on the mold core 2. After the required number of stator or rotor laminations are stacked on the mold core 2, the buffer device 3 is pressed onto the stator laminations. When the buffer device 3 is installed on the mold core 2, the first lower pressure plate 31 is sleeved on the outside of the mold core 2, and the bottom end of the first lower pressure plate 31 is pressed onto the stator or rotor laminations.
[0018] When the stacked laminations are pressed together, external force acts on the second lower pressure plate 32 of the buffer device 3. The second lower pressure plate 32 acts on the spring 33, compressing the spring 33. The spring 33 then transmits the force to the first lower pressure plate 31, which presses the entire stack of laminations together, facilitating subsequent welding. By incorporating the spring 33, the downward pressure acting on the second lower pressure plate 32 can be buffered, effectively preventing excessive impact force on the laminations, preventing over-compression of the laminations, and ensuring the quality of the laminations.
[0019] A fixture for pressing and welding stator and rotor laminations further includes a limiting block 4, which is located between a first lower pressure plate 31 and a second lower pressure plate 32. The limiting block 4 can be placed between the first lower pressure plate 31 and the second lower pressure plate 32, or it can be removed from between them. Specifically, when an external impact force first presses the laminations, the limiting block 4 is placed between the two lower pressure plates to prevent the second lower pressure plate 32 from pressing down excessively. Because the inner diameter of the second lower pressure plate 32 is smaller than the outer diameter of the mold core 2, during subsequent pressing processes, when the second lower pressure plate 32 presses down to the top of the mold core 2, it cannot continue to press down, thus preventing excessive downward pressure.
[0020] The buffer device 3 also includes a mounting post 34, one end of which is fixed to the first lower pressure plate 31, and the other end can pass through the second lower pressure plate 32. The spring 33 is sleeved on the mounting post 34. Therefore, by providing the mounting post 34, the installation of the spring 33 can be facilitated, ensuring that the spring 33 can be held between the two lower pressure plates.
[0021] Multiple springs 33 are evenly distributed around the outer periphery of the mold core 2, and multiple mounting posts 34 correspond to the springs 33. The number of springs 33 can be two, three, four, or five, etc., which can be increased or decreased according to the actual downward pressure required by the stator or rotor laminations, thus playing a buffering role against the downward pressure.
[0022] The tooling for pressing and welding stator and rotor laminations according to this utility model also includes a baffle 5, which is disposed on the base 1 and sleeved on the outside of the mold core 2. The baffle 5 is provided with a boss 51. The boss 51 and the baffle 5 are integrally formed.
[0023] The outer diameter of the boss 51 is smaller than the outer diameter of the baffle 5, and the outer diameter of the boss 51 is the same as the outer diameter of the first lower pressure plate 31. The outer diameters of the boss 51 and the second lower pressure plate 31 are both the same as the outer diameter of the stator lamination, which can facilitate the support of the stator lamination. At the same time, it can facilitate the smooth transmission of the downward pressure when the stator lamination is pressed to the lamination, thus improving the uniformity of the force.
[0024] The outer periphery of the first lower pressure plate 31 is provided with a plurality of first vertical grooves 311, which extend from the upper end face of the first lower pressure plate 31 to the lower end face of the first lower pressure plate 31.
[0025] The outer periphery of the boss 51 is provided with a plurality of second vertical grooves 511, which correspond to the first vertical grooves 311.
[0026] In actual use, the first vertical groove 311 and the second vertical groove 511 correspond to the welding groove on the outer periphery of the stator lamination. By providing the first vertical groove 311 and the second vertical groove 511, when the external welding head is welded to the upper and lower ends of the stator lamination, it can act well on the stator lamination. The first vertical groove 311 and the second vertical groove 511 form a good clearance position, which avoids the first lower pressure plate 31 and the boss 51 from blocking the welding head, ensuring that the entire stack of stator or rotor laminations can be well welded and fixed, and ensuring the welding quality.
[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.
Claims
1. A tooling for pressing and welding stator and rotor laminations, characterized in that, The device includes a base (1), a mold core (2), and a buffer device (3). The mold core (2) is mounted on the base (1). The buffer device (3) includes a first lower pressure plate (31), a second lower pressure plate (32), and a spring (33). The first lower pressure plate (31) is located below the second lower pressure plate (32) and is sleeved on the outside of the mold core (2). The second lower pressure plate (32) is located above the mold core (2). The inner diameter of the second lower pressure plate (32) is smaller than the outer diameter of the mold core (2). The spring (33) is located between the first lower pressure plate (31) and the second lower pressure plate (32). The two ends of the spring (33) abut against the first lower pressure plate (31) and the second lower pressure plate (32), respectively.
2. The tooling for pressing and welding stator and rotor laminations according to claim 1, characterized in that, It also includes a limiting block (4), which is located between the first lower pressure plate (31) and the second lower pressure plate (32).
3. The tooling for pressing and welding stator and rotor laminations according to claim 2, characterized in that, The buffer device (3) also includes a mounting post (34), one end of which is fixed to the first lower pressure plate (31), and the other end can pass through the second lower pressure plate (32). The spring (33) is sleeved on the mounting post (34).
4. The tooling for pressing and welding stator and rotor laminations according to claim 3, characterized in that, There are multiple springs (33) evenly distributed on the outer periphery of the mold core (2), and there are multiple mounting posts (34) corresponding to the springs (33).
5. A tooling for pressing and welding stator and rotor laminations according to any one of claims 1 to 4, characterized in that, It also includes a baffle (5), which is disposed on the base (1) and sleeved on the outside of the mold core (2). The baffle (5) is provided with a boss (51).
6. The tooling for pressing and welding stator and rotor laminations according to claim 5, characterized in that, The outer diameter of the boss (51) is smaller than the outer diameter of the baffle (5), and the outer diameter of the boss (51) is the same as the outer diameter of the first lower pressure plate (31).
7. The tooling for pressing and welding stator and rotor laminations according to claim 6, characterized in that, The outer periphery of the first lower pressure plate (31) is provided with a plurality of first vertical grooves (311), which extend from the upper end face of the first lower pressure plate (31) to the lower end face of the first lower pressure plate (31).
8. The tooling for pressing and welding stator and rotor laminations according to claim 7, characterized in that, The outer periphery of the boss (51) is provided with a plurality of second vertical grooves (511), which correspond to the first vertical groove (311).