Permanent magnet motor rotor punching die

Abstract

The utility model discloses a permanent magnet motor rotor punching die which comprises a lower die base, an upper die base arranged above the lower die base, a guide column fixedly connected with the bottom surface of the upper die base, a sleeve fixedly connected with the upper surface of the lower die base, a movable plate arranged inside the sleeve, an elastic piece fixedly connected with the bottom surface of the movable plate, and an oil storage cavity arranged inside the sleeve. A communicating hole is formed in the inner wall of the sleeve, an air pressure balance hole is formed in the outer side of the lower die base, the outer side of the lower die base is fixedly connected with a material injection opening, the upper die base is fixedly connected with an oil injection plate, and the bottom face of the upper die base is fixedly connected with one end of a fixing frame. The guide column is buffered through the moving plate and the elastic piece, die damage caused by too large impact force of an upper die is avoided, when the moving plate enables air to push the piston to move upwards, lubricating oil can be sprayed out of the discharging hole for lubrication, the self-lubricating effect of the guide column is achieved, the surface of a silicon steel sheet is evenly coated with the oil liquid through the coating roller, and the service life of the silicon steel sheet is prolonged. And burrs generated by stamping are reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor mold technology, specifically a permanent magnet motor rotor lamination mold. Background Technology

[0002] Permanent magnet motors are widely used due to their high torque and energy-saving properties. The rotor of a permanent magnet motor is made of stamped silicon steel sheets. The rotor laminations are usually composed of magnet holes, leakage magnetic holes, weight reduction holes, and shaft holes, so molds are required to stamp the silicon steel sheets.

[0003] The stamping die has guide pillars and sleeves to ensure the stability of the upper and lower dies when they are closed, while also acting as a buffer to reduce wear on the die and the stamping head. However, after a long period of use, the lubricating oil on the guide pillars evaporates, requiring manual addition of lubricating oil by the staff. If the lubricating oil is not added in time, it can easily cause wear on the guide pillars and noise, affecting the mold closing effect. Because silicon steel sheets have high hardness, they rub against the material intensely during the stamping process, so lubricating oil needs to be applied to reduce the stamping pressure, reduce burrs, and reduce damage to the stamping sheets. However, traditional lubricating oil application is inefficient and labor-intensive. Utility Model Content

[0004] The purpose of this invention is to provide a permanent magnet motor rotor lamination die to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a permanent magnet motor rotor lamination die, comprising a lower die base, an upper die base disposed above the lower die base, the bottom surface of the upper die base being fixedly connected to a guide post, the upper surface of the lower die base being fixedly connected to a sleeve, a movable plate disposed inside the sleeve, the bottom surface of the movable plate being fixedly connected to an elastic element, an oil storage cavity disposed inside the sleeve, a communicating hole being opened in the inner wall of the sleeve, an air pressure balance hole being opened on the outer side of the lower die base, a material injection port being fixedly connected to the outer side of the lower die base, an oil spraying plate being fixedly connected to the upper die base, a fixed connection between the bottom surface of the upper die base and one end of a fixed frame, a rotatable connection between the side of the fixed frame and a transfer roller, limiting rings being disposed on both sides of the transfer roller, and a rotatable connection between the side of the fixed frame and a coating roller.

[0006] Preferably, the upper surface of the lower mold base is connected to the lower mold, the bottom surface of the upper mold base is fixedly connected to the upper mold, the lower mold and the upper mold are positioned to match each other, and the upper mold base is slidably engaged with the sleeve via guide posts.

[0007] Preferably, a circular through hole is formed at the center of the sleeve, the inside of the sleeve slides with the outside of the moving plate, a buffer cavity is formed between the moving plate and the sleeve, the elastic element is located in the buffer cavity, and the oil storage cavity is connected to the buffer cavity through a connecting hole.

[0008] Preferably, a piston is provided inside the sleeve, and the sleeve slides with the outside of the piston through an oil storage chamber. The oil storage chamber is connected to the outside through a pressure balance hole, and the pressure balance hole and the injection port are located on the upper and lower sides of the oil storage chamber, respectively.

[0009] Preferably, the inner wall of the sleeve has a discharge hole, which communicates with the inside of the oil storage chamber. The communication hole and the discharge hole are located at the top and bottom of the oil storage chamber, respectively.

[0010] Preferably, the bottom surface of the spray plate is connected and fixed to a plurality of spray nozzles, and a material transfer roller is provided at the bottom of the spray plate, the material transfer roller abutting against the limiting ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses a sleeve at the bottom of the guide column to make the mold closing of the lower and upper molds more precise. The guide column is buffered by the moving plate and elastic element to avoid excessive impact force on the upper mold and damage to the mold. When the moving plate moves, air enters the bottom of the oil storage chamber through the connecting hole, thereby pushing the piston to move upward, so that the lubricating oil in the oil storage chamber can be sprayed out from the discharge hole for lubrication, realizing the self-lubricating effect of the guide column. There is no need for the staff to add lubricating oil repeatedly, reducing the workload of the staff.

[0013] 2. This utility model also sprays lubricating oil onto the transfer roller through the nozzle at the bottom of the oil spraying plate. The oil is evenly coated on the surface of the silicon steel sheet through the contact between the transfer roller and the coating roller, which reduces burrs generated by stamping, reduces damage to the mold and stamping head, and extends service life. The coating roller can improve the uniformity of coating and ensure a thinner oil film, avoiding the problem of a thick oil film affecting the subsequent cleaning effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0016] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0017] Figure 4 This is a schematic diagram of the connection structure of this utility model.

[0018] In the diagram: 1. Lower mold base; 101. Lower mold; 2. Upper mold base; 201. Upper mold; 3. Guide post; 4. Sleeve; 5. Moving plate; 6. Elastic component; 7. Oil storage cavity; 8. Connecting hole; 9. Air pressure balance hole; 10. Discharge hole; 11. Injection port; 12. Oil spray plate; 13. Fixing frame; 14. Transfer roller; 15. Limiting ring; 16. Coating roller; 17. Piston. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a permanent magnet motor rotor lamination die, including a lower die base 1, an upper die base 2 above the lower die base 1, the upper surface of the lower die base 1 being connected to the lower die 101, the bottom surface of the upper die base 2 being welded and fixed to the upper die 201, the lower die 101 and the upper die 201 being positionally matched, the lower die 101 and the upper die 201 being provided with a stamping head and a stamping groove, the bottom surface of the upper die base 2 being welded and fixed to a guide post 3, the upper surface of the lower die base 1 being welded and fixed to a sleeve 4, the sleeve 4 having a circular through hole in its center, and the upper die base 2 slidingly engaging with the sleeve 4 through the guide post 3.

[0021] A movable plate 5 is installed inside the sleeve 4. The bottom surface of the movable plate 5 is connected and fixed to the elastic element 6. The inside of the sleeve 4 and the outside of the movable plate 5 are slidably fitted, forming a buffer cavity between the movable plate 5 and the sleeve 4. The elastic element 6 is located inside the buffer cavity. The oil storage cavity 7 is connected to the buffer cavity through the connecting hole 8. In this way, the movable plate 5 can move and push the air in the buffer cavity through the connecting hole 8 to enter below the piston 17. Since the inner diameter of the connecting hole 8 is larger than the inner diameter of the air pressure balance hole 9, only a small part of the air compressed by the movable plate 5 is discharged from the air pressure balance hole 9, and most of the air is discharged through the connecting hole 9. Air enters the oil storage chamber 7 through the connecting hole 8, thereby pushing the piston 17 upward within the oil storage chamber 7. This causes the lubricating oil above the oil storage chamber 7 to be sprayed out from the discharge hole 10 into the gap between the guide column 3 and the sleeve 4, filling the gap with lubricating oil. When the gap is full, the pressure prevents the lubricating oil from continuing to discharge from the discharge hole 10, thus avoiding continuous spraying of lubricating oil from the discharge hole 10 during the reciprocating movement of the guide column 3. Lubricating oil will only be sprayed out from the discharge hole 10 when the lubricating oil on the outside of the guide column 3 is consumed and a gap is created, achieving self-lubrication.

[0022] The sleeve 4 has an oil storage chamber 7 inside, which is an annular groove. A piston 17 is installed inside the sleeve 4. The sleeve 4 slides against the outer side of the piston 17 through the oil storage chamber 7. The piston 17 is made of rubber. The piston 17 is balanced by the connecting hole 8 and the discharge hole 10, preventing the piston 17 from shifting under normal conditions and causing excess lubricating oil to spray out from the discharge hole 10.

[0023] A connecting hole 8 is provided on the inner wall of the sleeve 4, and an air pressure balance hole 9 is provided on the outer side of the lower mold base 1. The outer side of the lower mold base 1 is welded and fixed to the injection port 11. The upper mold base 2 is welded and fixed to the spray plate 12. The bottom surface of the upper mold base 2 is welded and fixed to one end of the fixing frame 13. The side of the fixing frame 13 is rotatably connected to the transfer roller 14. Limiting rings 15 are provided on both sides of the transfer roller 14. The side of the fixing frame 13 is rotatably connected to the coating roller 16.

[0024] The oil storage chamber 7 is connected to the outside through the air pressure balance hole 9. The air pressure balance hole 9 and the injection port 11 are located on the upper and lower sides of the oil storage chamber 7, respectively. The inner wall of the sleeve 4 has an outlet hole 10, which is connected to the inside of the oil storage chamber 7. The connecting hole 8 and the outlet hole 10 are located at the top and bottom of the oil storage chamber 7, respectively. The bottom surface of the spray plate 12 is connected and fixed to several spray heads. A transfer roller 14 is set at the bottom of the spray plate 12. The transfer roller 14 abuts against the limiting ring 15. The limiting ring 15 is in contact with the side of the coating roller 16. The limiting ring 15 is made of rubber. The limiting ring 15 prevents lubricating oil from leaking from both sides of the coating roller 16. The coating roller 16 makes the lubricating oil coating more uniform and ensures a thinner coating thickness.

[0025] Working principle: In use, the lower mold base 1 and the upper mold base 2 are fixed together with bolts. The silicon steel sheet is placed between the lower mold 101 and the upper mold 201. The silicon steel sheet is pulled by the winding equipment. When the lower mold base 1 moves downward, it drives the guide column 3 to move inside the sleeve 4, ensuring the accuracy of the mold closing between the lower mold base 1 and the upper mold base 2. The guide column 3 pushes the moving plate 5 downward. The compression elastic element 6 buffers the guide column 3 to prevent the lower mold 101 from being damaged by mutual impact with the discharge hole 10. When the moving plate 5 moves downward, it will squeeze the air at the bottom of the moving plate 5 into the connecting hole 8. Inside the oil storage chamber 7, the piston 17 is pushed upward within the oil storage chamber 7, thereby spraying the lubricating oil inside the oil storage chamber 7 from the discharge hole 10 into the gap between the guide column 3 and the sleeve 4, achieving self-lubrication of the guide column 3. Subsequently, the elastic force of the elastic element 6 pushes the moving plate 5 to reset. At this time, outside air enters the oil storage chamber 7 through the air pressure balance hole 9 to balance the pressure difference between the sleeve 4 and the oil storage chamber 7. Then, the lubricating oil is sprayed onto the transfer roller 14 through the oil spray plate 12. The lubricating oil is coated on the surface of the silicon steel sheet by the contact between the transfer roller 14 and the coating roller 16, reducing the generation of burrs and damage to the silicon steel sheet.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet motor rotor lamination die, comprising a lower die base (1), characterized in that: An upper mold base (2) is provided above the lower mold base (1). The bottom surface of the upper mold base (2) is fixedly connected to the guide column (3). The upper surface of the lower mold base (1) is fixedly connected to the sleeve (4). A movable plate (5) is provided inside the sleeve (4). The bottom surface of the movable plate (5) is fixedly connected to the elastic element (6). An oil storage cavity (7) is provided inside the sleeve (4). A connecting hole (8) is opened on the inner wall of the sleeve (4). An air pressure balance hole (9) is opened on the outer side of the lower mold base (1). The outer side of the lower mold base (1) is fixedly connected to the injection port (11). The upper mold base (2) is fixedly connected to the spray plate (12). The bottom surface of the upper mold base (2) is fixedly connected to one end of the fixed frame (13). The side of the fixed frame (13) is rotatably connected to the transfer roller (14). Limiting rings (15) are provided on both sides of the transfer roller (14). The side of the fixed frame (13) is rotatably connected to the coating roller (16).

2. The permanent magnet motor rotor lamination die according to claim 1, characterized in that: The upper surface of the lower mold base (1) is connected to the lower mold (101), the bottom surface of the upper mold base (2) is fixedly connected to the upper mold (201), the lower mold (101) and the upper mold (201) are matched in position, and the upper mold base (2) is slidably engaged with the sleeve (4) through the guide post (3).

3. The permanent magnet motor rotor lamination die according to claim 2, characterized in that: The sleeve (4) has a circular through hole in the center. The inside of the sleeve (4) is slidably fitted with the outside of the moving plate (5). A buffer cavity is formed between the moving plate (5) and the sleeve (4). The elastic element (6) is located in the buffer cavity. The oil storage cavity (7) is connected to the buffer cavity through the connecting hole (8).

4. A permanent magnet motor rotor lamination die according to claim 3, characterized in that: The sleeve (4) is equipped with a piston (17). The sleeve (4) slides with the piston (17) through the oil storage chamber (7). The oil storage chamber (7) is connected to the outside through the air pressure balance hole (9). The air pressure balance hole (9) and the injection port (11) are located on the upper and lower sides of the oil storage chamber (7), respectively.

5. A permanent magnet motor rotor lamination die according to claim 4, characterized in that: The sleeve (4) has a discharge hole (10) on its inner wall. The discharge hole (10) is connected to the inside of the oil storage cavity (7). The connecting hole (8) and the discharge hole (10) are located at the top and bottom of the oil storage cavity (7), respectively.

6. A permanent magnet motor rotor lamination die according to claim 1, characterized in that: The bottom surface of the spray plate (12) is connected and fixed to several nozzles. A material transfer roller (14) is provided at the bottom of the spray plate (12), and the material transfer roller (14) abuts against the limiting ring (15).

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