Stamping device for rotor internal gear machining

Abstract

The invention belongs to the technical field of rotor internal gear machining, and particularly relates to a stamping device for rotor internal gear machining, which comprises a stamping table, a pressure frame, a stamping mechanism and a demolding mechanism, the pressure frame is arranged on the upper wall of the stamping table, and the stamping mechanism comprises a driving assembly, an upper die assembly, a lower die assembly and a material distribution assembly. The driving assembly is arranged on the pressure frame, the upper die assembly is arranged on the bottom wall of the driving assembly, the lower die assembly is arranged on the upper wall of the stamping table, and the material distributing assembly is arranged on the bottom wall of the stamping table. According to the stamping device for machining the rotor inner gear, active demolding of the formed rotor inner gear after stamping can be achieved, and real-time monitoring and early warning of the mold abrasion degree can be achieved through demolding state feedback.

Description

Technical Field

[0001] This invention belongs to the field of rotor internal gear processing technology, specifically referring to a stamping device for rotor internal gear processing. Background Technology

[0002] Rotor internal gear stamping generally refers to the manufacturing process of motor rotor laminations, which involves punching rotor slots (resembling internal gears) and shaft holes into silicon steel sheets using stamping dies. It is a high-precision, high-efficiency cold stamping process widely used in motors (including automotive motors) and other fields.

[0003] The existing stamping devices for machining internal rotor gears have the following problems: Existing stamping devices for processing rotor internal gears lack an active demolding function for forming rotor internal gears after stamping. This can easily cause the formed rotor internal gears to get stuck inside the mold, increasing the processing difficulty and reducing processing efficiency. Furthermore, traditional stamping devices for processing rotor internal gears do not have the ability to monitor the wear of the mold in real time, which in turn leads to a decrease in the forming accuracy and poor quality of the rotor internal gears. Therefore, it cannot meet the existing requirements for stamping equipment used in machining internal gears of rotors. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this solution provides a stamping device for processing rotor internal gears, which can realize active demolding of the stamped rotor internal gears, and can realize real-time monitoring and early warning of the wear degree of the mold through demolding status feedback.

[0005] The technical solution adopted in this solution is as follows: This solution proposes a stamping device for machining internal gears of a rotor, including a stamping table, a pressure frame, a stamping mechanism, and a die-removal mechanism. The pressure frame is mounted on the upper wall of the stamping table. The stamping mechanism includes a drive assembly, an upper die assembly, a lower die assembly, and a material distribution assembly. The drive assembly is mounted on the pressure frame, the upper die assembly is mounted on the bottom wall of the drive assembly, the lower die assembly is mounted on the upper wall of the stamping table, and the material distribution assembly is mounted on the bottom wall of the stamping table. The die-removal mechanism includes a guide assembly and a grinding assembly, which are respectively mounted on the upper die assembly.

[0006] As a further preferred embodiment of the present invention, the driving assembly includes a pressure block and a hydraulic cylinder. The pressure block is slidably disposed on the inner wall of the pressure frame, and the hydraulic cylinder is disposed through the upper wall of the pressure frame, with its output end connected to the upper wall of the pressure block. The upper die assembly includes an outer stamping die base, an inner stamping die base, an outer stamping die, an inner stamping die, a distance sensor, and a distance measuring port. The outer stamping die base is disposed on the bottom wall of the pressure block, the inner stamping die base is disposed on the inner wall of the pressure block inside the outer stamping die base, the outer stamping die is disposed on the bottom wall of the outer stamping die base, the inner stamping die is disposed on the bottom wall of the inner stamping die base, the distance measuring port is disposed on the upper wall of the pressure block, and the distance sensor is disposed on the upper wall of the pressure block at the top of the distance measuring port. The end of the distance measuring port away from the distance sensor is located on the inner wall of the outer stamping die base and the side of the inner stamping die. The pressure block bottom wall between the walls; the lower die assembly includes a lower die base, a forming block and an annular groove. The lower die base is located on the upper wall of the stamping platform, the forming block is located on the upper wall of the stamping platform inside the lower die base, there is an annular gap between the forming block and the inner wall of the lower die base, the annular groove is located on the upper wall of the stamping platform and the annular groove is open at the top. The outer diameter of the stamping outer die matches the inner diameter of the annular groove, and the inner diameter is consistent with the width of the annular gap between the forming block and the inner wall of the lower die base; the material distribution assembly includes a material distribution port, a material distribution column, a material distribution plate and a material distribution spring. The material distribution port is located on the upper wall of the stamping platform, the material distribution column is slidably located inside the material distribution port, the material distribution plate is located on the bottom wall of the material distribution column, and the material distribution spring is located between the material distribution plate outside the material distribution column and the bottom wall of the stamping platform, and the material distribution spring is in a compressed state.

[0007] In use, the sheet metal to be stamped is placed on the upper wall of the forming block inside the lower die base. The output end of the hydraulic cylinder extends, causing the pressure block to slide and descend along the inner wall of the pressure frame. The pressure block, through the outer and inner die bases, drives the outer and inner dies to descend, bringing them into contact with the sheet metal. As the output end of the hydraulic cylinder continues to extend, the outer die base drives the outer die into the annular groove, while the inner die base drives the inner die to press down on the material distribution column. Under the elastic deformation of the distribution spring, the material distribution column slides along the material distribution opening. As the plate descends, excess material is cut off by the outer and inner stamping dies. When the bottom wall of the outer stamping die contacts the bottom wall of the annular groove, the distance between the measuring end of the distance sensor and the plate reaches the preset distance. The output end of the hydraulic cylinder shortens, causing the pressure block to rise. The pressure block, through the outer and inner stamping die holders, causes the outer and inner stamping dies to rise. The stamped plate has the same shape as the formed block. The operator removes the rotor internal gear, which is stamped inside the lower die holder, thus completing the stamping operation of the rotor internal gear.

[0008] Preferably, the guiding assembly includes guide rails, pressing grooves, and pressing blocks. Multiple sets of guide rails are disposed on the side wall of the inner die holder of the stamping, and multiple sets of pressing grooves are disposed on the inner wall of the inner die holder of the stamping. The pressing blocks are slidably disposed inside the pressing grooves. The grinding assembly includes a filling air bladder, an elastic grinding layer, an air pump, and an air inflator hose. The filling air bladder is disposed on the inner wall of the outer die holder of the stamping, the air pump is disposed on the side wall of the pressure frame, and the air inflator hose passes through the pressure frame and the pressure block and is disposed between the output end of the air pump and the filling air bladder.

[0009] In use, the lower pressing block is located at the bottom of the lower pressing groove. When the outer and inner stamping dies are in contact with the sheet metal, the bottom wall of the lower pressing block is in contact with the upper wall of the sheet metal. As the outer and inner stamping dies extend into the annular groove and the material distribution port respectively, the lower pressing block slides upward along the lower pressing groove under the obstruction of the sheet metal, moving in opposite directions to the outer and inner stamping dies. As the output end of the hydraulic cylinder shortens, the outer and inner stamping dies move away from the upper wall of the lower die base. The lower pressing block slides down along the lower pressing groove and uses its own gravity to push the rotor internal gear formed between the outer and inner stamping dies. The rotor internal gear is disengaged from between the outer and inner stamping dies under the downward pressure of the lower pressing block.

[0010] Specifically, the pressure frame is equipped with a controller on its side wall.

[0011] The controller is electrically connected to both the hydraulic cylinder and the air pump.

[0012] The beneficial effects achieved by this solution using the above structure are as follows: Compared with existing technologies, this solution combines a stamping mechanism with a demolding mechanism. Through the inclusion of a drive assembly, upper die assembly, lower die assembly, material distribution assembly, guide assembly, and grinding assembly, it can automatically demold the stamped rotor internal gear. Utilizing the gravitational potential energy of the lower pressure block freely descending along the slide groove, it pushes the rotor internal gear, which is engaged between the outer and inner stamping dies, separating it from the dies and achieving demolding. When the outer and inner stamping dies contact the sheet metal, an air pump inflates the filling airbag through an air hose. At this time, the outer elastic grinding layer... The surface is flush with the inner wall of the outer stamping die. As the outer stamping die extends into the annular groove, the formed rotor inner gear slides along the guide rail and enters the accommodating space formed by the outer stamping die base and the inner stamping die base. The outer stamping die, through the filling air bladder, drives the elastic grinding layer to grind the side wall of the formed rotor inner gear, reducing the frictional resistance between the side wall of the formed rotor inner gear and the inner wall of the outer stamping die. Combined with the gravity thrust of the lower pressure block, the formed rotor inner gear can be more easily separated from the outer stamping die and the inner stamping die, achieving smooth demolding and thus realizing the demolding process of the workpiece. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of this solution; Figure 2 This is the front perspective stereoscopic view of this solution; Figure 3 This is a schematic diagram of the combined structure of the driving component and the upper mold component in this solution; Figure 4 This is a schematic diagram of the upper mold component in this solution; Figure 5 This is a schematic diagram of the grinding assembly in this solution; Figure 6 This is the main view of this solution; Figure 7 This is a side view of the design. Figure 8 This is a top view of the plan; Figure 9 for Figure 7 Sectional view of AA section; Figure 10 for Figure 8 Sectional view of BB section; Figure 11 for Figure 9 Enlarged structural view of section I; Figure 12 for Figure 2 Enlarged structural view of Part II; Figure 13 for Figure 4 Enlarged structural view of Part III.

[0014] The components are as follows: 1. Stamping table, 2. Pressure frame, 3. Stamping mechanism, 4. Drive assembly, 5. Pressure block, 6. Hydraulic cylinder, 7. Upper mold assembly, 8. Stamping outer mold base, 9. Stamping inner mold base, 10. Stamping outer mold, 11. Stamping inner mold, 12. Lower mold assembly, 13. Lower mold base, 14. Forming block, 15. Annular groove, 16. Material distribution assembly, 17. Material distribution port, 18. Material distribution column, 19. Material distribution plate, 20. Material distribution spring, 21. Demolding mechanism, 22. Guide assembly, 23. Guide rail, 24. Lower pressure groove, 25. Lower pressure block, 26. Grinding assembly, 27. Filling airbag, 28. Elastic grinding layer, 29. Air pump, 30. Inflation hose, 31. Controller, 32. Distance sensor, 33. Distance measuring port.

[0015] The accompanying drawings are provided to further understand the present solution and form part of the specification. They are used together with the embodiments of the present solution to explain the present solution and do not constitute a limitation thereof. Detailed Implementation

[0016] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this solution, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this solution without creative effort are within the scope of protection of this solution.

[0017] In the description of this solution, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" 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 solution 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 solution.

[0018] like Figures 1-13 As shown, the present invention proposes a stamping device for machining internal gears of a rotor, comprising a stamping table 1, a pressure frame 2, a stamping mechanism 3, and a die removal mechanism 21. The pressure frame 2 is disposed on the upper wall of the stamping table 1. The stamping mechanism 3 includes a drive assembly 4, an upper die assembly 7, a lower die assembly 12, and a material distribution assembly 16. The drive assembly 4 is disposed on the pressure frame 2, the upper die assembly 7 is disposed on the bottom wall of the drive assembly 4, the lower die assembly 12 is disposed on the upper wall of the stamping table 1, and the material distribution assembly 16 is disposed on the bottom wall of the stamping table 1. The die removal mechanism 21 includes a guide assembly 22 and a grinding assembly 26, which are respectively disposed on the upper die assembly 7.

[0019] The driving assembly 4 includes a pressure block 5 and a hydraulic cylinder 6. The pressure block 5 is slidably disposed on the inner wall of the pressure frame 2, and the hydraulic cylinder 6 is disposed through the upper wall of the pressure frame 2. The output end of the hydraulic cylinder 6 is connected to the upper wall of the pressure block 5. The upper mold assembly 7 includes a stamping outer mold base 8, a stamping inner mold base 9, a stamping outer mold 10, a stamping inner mold 11, a distance sensor 32, and a distance measuring port 33. The stamping outer mold base 8 is disposed on the bottom wall of the pressure block 5. The stamping inner mold base 9 is disposed on the inner wall of the pressure block 5 inside the stamping outer mold base 8. The stamping outer mold 10 is disposed on the bottom wall of the stamping outer mold base 8. The stamping inner mold 11 is disposed on the bottom wall of the stamping inner mold base 9. The distance measuring port 33 is disposed on the upper wall of the pressure block 5. The distance sensor 32 is disposed on the upper wall of the pressure block 5 at the top of the distance measuring port 33. The end of the distance measuring port 33 away from the distance sensor 32 is located on the bottom wall of the pressure block 5 between the inner wall of the stamping outer mold base 8 and the side wall of the stamping inner mold 11. The lower die assembly 12 includes a lower die base 13, a forming block 14, and an annular groove 15. The lower die base 13 is disposed on the upper wall of the stamping table 1, and the forming block 14 is disposed on the upper wall of the stamping table 1 inside the lower die base 13. There is an annular gap between the forming block 14 and the inner wall of the lower die base 13. The annular groove 15 is disposed on the upper wall of the stamping table 1 and is open at the top. The outer diameter and inner diameter of the stamping outer die 10 are respectively connected to the annular groove 15 and the forming block 14 and the lower die. There is a consistent annular gap between the inner walls of the seat 13; the material distribution assembly 16 includes a material distribution port 17, a material distribution column 18, a material distribution plate 19 and a material distribution spring 20. The material distribution port 17 is located on the upper wall of the stamping table 1. The material distribution column 18 is slidably located inside the material distribution port 17. The material distribution plate 19 is located on the bottom wall of the material distribution column 18. The material distribution spring 20 is located between the material distribution plate 19 outside the material distribution column 18 and the bottom wall of the stamping table 1, and the material distribution spring 20 is in a compressed state.

[0020] The guiding assembly 22 includes a guide rail 23, a pressing groove 24, and a pressing block 25. Multiple sets of the guide rails 23 are provided on the side wall of the stamping inner die base 9, and multiple sets of the pressing grooves 24 are provided on the inner wall of the stamping inner die base 9. The pressing block 25 is slidably disposed inside the pressing groove 24. The grinding assembly 26 includes a filling airbag 27, an elastic grinding layer 28, an air pump 29, and an air hose 30. The filling airbag 27 is provided on the inner wall of the stamping outer die base 8, the air pump 29 is provided on the side wall of the pressure frame 2, and the air hose 30 passes through the pressure frame 2 and the pressure block 5 and is connected between the output end of the air pump 29 and the filling airbag 27.

[0021] The pressure frame 2 is equipped with a controller 31 on its side wall.

[0022] The controller 31 is electrically connected to the hydraulic cylinder 6 and the air pump 29, respectively.

[0023] In actual use, in the initial state, the output end of the hydraulic cylinder 6 is shortened, the distance between the outer stamping mold 10 and the inner stamping mold 11 and the lower mold base 13 is at its maximum, the filling airbag 27 is in an uninflated state, the upper wall of the material distribution column 18 is flush with the upper wall of the forming block 14, the lower pressing block 25 is located at the bottom of the lower pressing groove 24, and the lower pressing block 25 is flush with the bottom wall of the outer stamping mold 10 and the inner stamping mold 11 respectively. Two sets of distance measurement thresholds are pre-set for the distance measuring sensor 32. The operator places the sheet metal to be stamped into the upper wall of the forming block 14 inside the lower die base 13. The controller 31 controls the hydraulic cylinder 6 to start. The output end of the hydraulic cylinder 6 extends and drives the pressure block 5 to slide down along the inner wall of the pressure frame 2. The pressure block 5 drives the outer stamping die 10 and the inner stamping die 11 to descend through the outer stamping die base 8 and the inner stamping die base 9. The outer stamping die 10 and the inner stamping die 11 descend and contact the sheet metal. At this time, the first set of thresholds between the distance sensor 32 and the sheet metal is reached. The controller 31 controls the air pump 29 to start. The air pump 29 inflates the air bladder 27 through the air hose 30. The air bladder 27 inflates and drives the elastic grinding layer 28 to be flush with the inner wall of the outer stamping die 10. As the output end of the hydraulic cylinder 6 continues to extend, the excess part of the sheet metal is punched off by the outer stamping die 10 and the inner stamping die 11. The outer stamping die base 8 drives the outer stamping die 10 to extend into the annular groove 15. The inner stamping die base 9 drives the inner stamping die 11 to press down the material distribution column 18. The material distribution column 18 slides down along the material distribution port 17 under the elastic deformation of the material distribution spring 20. The formed rotor inner gear slides along the guide rail 23 into the space formed by the outer stamping die base 8 and the inner stamping die base 9. The outer stamping die 10 moves with the pressing process. The filling air bag 27 drives the elastic grinding layer 28 to slide relative to the side wall of the formed rotor inner gear, grinding the side of the formed rotor inner gear that contacts the inner wall of the outer stamping die 10, reducing the frictional resistance between it and the inner wall of the outer stamping die 10. The lower pressure block 25 is held in place against the upper wall of the formed rotor inner gear by the obstruction of the plate. The lower pressure block 25 slides down along the lower pressure groove 24 and extends to the outside of the space formed by the stamping outer mold base 8 and the stamping inner mold base 9. When the bottom wall of the stamping outer mold 10 contacts the bottom wall of the annular groove 15, the grinding process of the side wall of the formed rotor inner gear is completed. The distance between the measuring end of the measuring sensor 32 and the plate reaches the second set of preset distances. The controller 31 controls the air pump 29 to discharge the gas inside the airbag 27 through the air hose 30. The controller 31 controls the output end of the hydraulic cylinder 6 to shorten and drive the pressure block 5 to rise. The pressure block 5 drives the stamping outer mold 10 and the stamping inner mold 11 to rise through the stamping outer mold base 8 and the stamping inner mold base 9. As the output end of the hydraulic cylinder 6 shortens, the outer stamping die 10 and the inner stamping die 11 move away from the upper wall of the lower die base 13. The lower pressing block 25 slides out of the space formed by the outer stamping die base 8 and the inner stamping die base 9 along the lower pressing groove 24. At the same time, the lower pressing block 25 pushes the formed rotor internal gear out of the space formed by the outer stamping die base 8 and the inner stamping die base 9, so that it falls into the gap between the outer stamping die 10 and the inner stamping die 11. The lower pressing block 25 slides down along the lower pressing groove 24 and uses its own gravity to push the rotor internal gear from between the outer stamping die 10 and the inner stamping die 11 into the lower die base 13. The stamped sheet has the same shape as the formed block 14. The operator takes out the rotor internal gear stamped inside the lower die base 13, thus completing the stamping operation of the rotor internal gear. As the number of stamping cycles increases, the cutting edges of the outer stamping die 10 and the inner stamping die 11 will gradually wear down, changing from sharp to rounded. After the cutting edges become dull, they cannot form a smooth shearing surface on the sheet metal. Instead, they will forcefully tear or compress the sheet metal, resulting in excessive surface roughness of the rotor internal gear after stamping. If the rotor internal gear, after being ground by the elastic grinding layer 28, cannot be dislodged from between the outer stamping die 10 and the inner stamping die 11 under the gravity of the lower pressure block 25, the operator is prompted to check the degree of wear of the cutting edges of the outer stamping die 10 and the inner stamping die 11 to ensure the stamping accuracy of the rotor internal gear and improve the forming quality of the rotor internal gear. The above operation can be repeated for the next use.

[0024] It should be noted that, in this document, 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.

[0025] The present solution and its implementation methods have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present solution; the actual structure is not limited to this. In conclusion, if a person skilled in the art, inspired by this description, designs a similar structure and embodiment without departing from the inventive intent of this solution, such design should fall within the protection scope of this solution.

Claims

1. A punching device for rotor inner gear machining, comprising a punching table and a pressure frame, characterized in that: It also includes a stamping mechanism and a die ejection mechanism. The pressure frame is mounted on the upper wall of the stamping platform. The stamping mechanism includes a drive assembly, an upper die assembly, a lower die assembly, and a material distribution assembly. The drive assembly is mounted on the pressure frame. The upper die assembly is mounted on the bottom wall of the drive assembly. The lower die assembly is mounted on the upper wall of the stamping platform. The material distribution assembly is mounted on the bottom wall of the stamping platform. The die ejection mechanism includes a guide assembly and a grinding assembly. The guide assembly and the grinding assembly are respectively mounted on the upper die assembly. The drive component includes a pressure block; The upper die assembly includes an outer stamping die base and an inner stamping die base; The guiding assembly includes a guide rail, a pressing groove, and a pressing block; Multiple sets of guide rails are provided on the side wall of the stamping inner die holder, multiple sets of pressing grooves are provided on the inner wall of the stamping inner die holder, and the pressing block is slidably provided inside the pressing groove; The grinding assembly includes a filling air bladder, an elastic grinding layer, an air pump, and an air inflator hose; The filling airbag is located on the inner wall of the stamping outer mold base, the inflation pump is located on the side wall of the pressure frame, and the inflation hose passes through the pressure frame and the pressure block and is located between the output end of the inflation pump and the filling airbag.

2. The stamping device for machining internal gears of a rotor according to claim 1, characterized in that: The drive assembly also includes a hydraulic cylinder. The pressure block is slidably disposed on the inner wall of the pressure frame, and the hydraulic cylinder is disposed through the upper wall of the pressure frame. The output end of the hydraulic cylinder is connected to the upper wall of the pressure block.

3. The stamping device for machining internal gears of a rotor according to claim 1, characterized in that: The upper die assembly also includes an outer stamping die, an inner stamping die, a distance sensor, and a distance measuring port. The outer stamping die base is located on the bottom wall of the pressure block, the inner stamping die base is located on the inner wall of the pressure block inside the outer stamping die base, the outer stamping die is located on the bottom wall of the outer stamping die base, the inner stamping die is located on the bottom wall of the inner stamping die base, the distance measuring port is located on the upper wall of the pressure block, and the distance measuring sensor is located on the upper wall of the pressure block above the distance measuring port.

4. The stamping device for machining internal gears of a rotor according to claim 3, characterized in that: The lower die assembly includes a lower die base, a forming block, and an annular groove. The lower die base is located on the upper wall of the stamping platform, and the forming block is located inside the lower die base on the upper wall of the stamping platform. There is an annular gap between the forming block and the inner wall of the lower die base. The annular groove is located on the upper wall of the stamping platform and has an opening at the top.

5. The stamping device for machining internal gears of a rotor according to claim 1, characterized in that: The material distribution assembly includes a material distribution port, a material distribution column, a material distribution plate, and a material distribution spring. The material distribution port is located on the upper wall of the stamping table. The material distribution column is slidably located inside the material distribution port. The material distribution plate is located on the bottom wall of the material distribution column. The material distribution spring is located between the material distribution plate on the outside of the material distribution column and the bottom wall of the stamping table, and the material distribution spring is in a compressed state.

6. A stamping device for machining internal gears of a rotor according to claim 4, characterized in that: The outer diameter of the stamping outer die matches the inner diameter of the annular groove, and the inner diameter is consistent with the width of the annular gap between the forming block and the inner wall of the lower die base.

7. A stamping device for machining internal gears of a rotor according to claim 3, characterized in that: The end of the ranging port furthest from the ranging sensor is located on the bottom wall of the pressure block between the inner wall of the outer stamping die base and the side wall of the inner stamping die.

Images