An aluminum alloy fan shell forming device and forming method with good pressure resistance and sealing performance

Abstract

This invention relates to the field of stamping, specifically to a forming device for aluminum alloy fan housings with good pressure resistance and sealing performance. The device includes: an upper die, disposed at the bottom of a lifting platform, with a deep punch hole at its bottom and a mounting groove at its top; a lower die, disposed on a base, with multiple punch holes at its top; a punching clearance mechanism, disposed on the base, used to close the punch holes during deep drawing of the fan housing and to expose the punch holes when punching is performed after deep drawing; and a punching mechanism, disposed within the mounting groove, with multiple punching rods and multiple clearance holes at the top of the deep punch holes for the punching rods to pass through. This invention integrates the deep drawing and punching of the fan housing into the same stamping process, effectively improving stamping efficiency. During deep drawing, the integrity of the die's deep drawing structure is maintained, ensuring the deep drawing effect. Before punching, the pressure on the fan housing is released to fully release stress, ensuring the quality of the punching.

Description

Technical Field

[0001] This invention relates to the field of stamping, and in particular to a forming device and method for forming aluminum alloy fan housings with good pressure resistance and sealing performance. Background Technology

[0002] Aluminum alloy fan housings are widely used in low-pressure fans and applications where weight and corrosion resistance are critical. To improve pressure resistance and sealing performance, stamping is now the preferred method for producing aluminum alloy fan housings. Therefore, how to efficiently and effectively process aluminum alloy fan housings has become a problem that needs to be solved.

[0003] Chinese patent CN117066389B discloses a centrifugal fan casing stamping device. The device uses an inner ring scraper to scrape off the outer surface of the circular plate remaining after stamping by moving downwards. This prevents the fan casing from being incompletely stamped and leaving residual parts connected to the circular plate. The residual parts are compressed in a small square hole by a pressure spring to prevent the pressure spring from being damaged by excessive pressure.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: the barrel-shaped fan casing needs to be deep-drawn to complete the deformation and stretching during stamping, and then another equipment is used to open the bottom of the fan casing, which increases the time for transfer and loading / unloading, and reduces the stamping efficiency of the fan casing. Summary of the Invention

[0005] The purpose of this invention is to address the problem in the prior art that deep drawing and punching of fan housings need to be carried out separately, resulting in low stamping efficiency, and to propose an aluminum alloy fan housing forming device with good pressure resistance and sealing performance.

[0006] On one hand, this invention proposes a forming device for an aluminum alloy fan housing with good pressure resistance and sealing performance, including a base, multiple guide columns vertically arranged on the base, a top platform at the top of the guide columns, a lifting platform slidingly arranged on the guide columns along the vertical direction, and a lifting device at the bottom of the top platform to drive the lifting platform to rise and fall; it also includes:

[0007] The upper die is located at the bottom of the lifting platform. The bottom of the upper die has a deep punch hole, and the top of the upper die has an installation groove.

[0008] The lower die is set on the base, and multiple punches are provided on the top of the lower die;

[0009] A punching avoidance mechanism is set on the base. It is used to close the punching hole when the fan housing is deep-drawn, and to expose the punching hole when the deep drawing of the fan housing is completed and punching is performed again.

[0010] The punching mechanism is installed in the mounting slot. The punching mechanism is equipped with multiple punching rods, and the top of the deep punch is equipped with multiple clearance holes for the punching rods to pass through.

[0011] Preferably, during deep punching of the fan casing, the punching rod is inserted into the clearance hole at the top of the deep punch hole, and the bottom of the punching rod is coplanar with the top of the deep punch hole. After the deep punching of the fan casing is completed, the punching rod passes through the clearance hole and extends into the deep punch hole.

[0012] Preferably, the punching avoidance mechanism includes a telescopic device a mounted on a base via a support column, a support block mounted on the top telescopic end of the telescopic device a, and a plurality of push rods mounted on the support block, the push rods being inserted into the punching hole.

[0013] Preferably, the punching mechanism includes a lifting plate that is slidably disposed in the mounting groove in a vertical direction, a plurality of punching rods disposed at the bottom of the lifting plate, a push plate disposed above the lifting plate that drives the lifting plate to move up and down by moving horizontally, and a telescopic device b disposed on the inner wall of the mounting groove that drives the push plate to move laterally.

[0014] Preferably, it also includes an auxiliary lifting platform, which is vertically movable on the base. The auxiliary lifting platform is annular, with its inner circle larger than the maximum cross-sectional size of the lower mold. A cutting ring is provided on the auxiliary lifting platform, and a ring that cooperates with the cutting ring is provided at the bottom of the upper mold.

[0015] Preferably, a fixed column is provided on the base, an electromagnet is provided on the top of the fixed column, and a magnetic plate is provided at the bottom of the auxiliary lifting platform, located directly above the electromagnet; a distance measuring device is provided on the base to measure the height of the auxiliary lifting platform.

[0016] Preferably, it also includes a control system, which is connected to the ranging device for data transmission, and is also connected to the lifting device, electromagnet, punching avoidance mechanism, and punching mechanism for control.

[0017] On the other hand, the present invention proposes a method for forming an aluminum alloy fan housing, comprising the following steps:

[0018] S1. Place the stamped sheet on the auxiliary lifting platform;

[0019] S2. When the lifting device lowers the lifting platform to the lowest point, the deep drawing of the fan plate is completed. At this time, the ranging device detects that the auxiliary lifting platform is at the lowest point, and the electromagnet is activated to attract and hold the auxiliary lifting platform.

[0020] S3. After the deep drawing is completed, the lifting device drives the lifting platform and the upper die to rise a certain distance. Then the punching mechanism causes the punching rod to extend into the deep punching hole, and the punching avoidance mechanism exposes the punching hole. In this state, the auxiliary lifting platform is attracted and held still by the electromagnet.

[0021] S4. Next, the lifting device will lower the upper mold to the lowest point to complete the punching of the fan housing. Then, the lifting device will raise the upper mold to the highest position.

[0022] S5. The ranging device detects that the lifting platform is at its highest point. The electromagnet is de-energized, and the auxiliary lifting platform moves upward under the action of the spring, pushing the deep-drawn and punched fan housing upward, completing the automatic separation of the stamped part from the lower die. Both telescopic devices a and b are reset.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects: the deep drawing and punching of the fan housing are concentrated in the same stamping process, which effectively improves the stamping efficiency. During deep drawing, the ejector pin is inserted into the punching hole and the punching rod is inserted into the clearance hole of the deep drawing hole, which ensures the integrity of the deep drawing structure of the mold and thus ensures the deep drawing effect. After the deep drawing is completed, the upper die needs to be moved up a certain distance before punching to release the pressure on the fan housing, restore it to a free state, and fully release the stress before punching, thus ensuring the quality of punching. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0025] Figure 2 for Figure 1 Partial structural diagram;

[0026] Figure 3 and Figure 4 All Figure 2 A partial cross-sectional diagram of the structure;

[0027] Figure 5 for Figure 4 Enlarged diagram of point A in the diagram.

[0028] Reference numerals: 1. Base; 2. Guide column; 3. Top platform; 4. Lifting device; 5. Lifting platform; 6. Upper mold; 7. Lower mold support column; 8. Lower mold; 9. Punch; 10. Push rod; 11. Support block; 12. Support column; 13. Telescopic device a; 14. Mounting groove; 15. Lifting plate; 16. Guide rod; 17. Punch rod; 18. Push plate; 19. Telescopic device b; 20. Deep punch; 21. Protective cylinder; 22. Distance measuring device; 23. Auxiliary lifting platform; 24. Cutting ring; 25. Damper; 26. Guide cylinder; 27. Spring; 28. Limiting plate a; 29. ​​Limiting plate b; 30. Fixed column; 31. Electromagnet. Detailed Implementation

[0029] Example 1, as Figures 1-4As shown, the present invention proposes an aluminum alloy fan housing forming device with good pressure resistance and sealing performance, including a base 1, a plurality of guide columns 2 vertically arranged on the base 1, a top platform 3 arranged on the top of the guide columns 2, a lifting platform 5 slidably arranged on the guide columns 2 along the vertical direction, and a lifting device 4 for driving the lifting platform 5 to rise and fall at the bottom of the top platform 3. In an optional embodiment, the lifting device 4 is a hydraulic lifting structure, which can provide a large and stable force; it also includes:

[0030] The upper mold 6 is set at the bottom of the lifting platform 5. The bottom of the upper mold 6 is provided with a deep punch hole 20, and the top of the upper mold 6 is provided with an installation groove 14.

[0031] The lower mold 8 is set on the base 1 and located directly below the upper mold 6 via the lower mold support 7. The lower mold 8 is an inverted barrel shape with a flange at the bottom. The top of the lower mold 8 is provided with multiple punch holes 9, which are clearance holes used to punch the formed fan housing.

[0032] The punching clearance mechanism is set on the base 1 and located below the lower die 8. It is used to close the punch hole 9 when the fan housing is deep-drawn. When the deep drawing of the fan housing is completed and punching is performed, the punch hole 9 is exposed. The punching waste can pass through the punch hole 9 and fall onto the base 1.

[0033] A punching mechanism is provided in the mounting groove 14. The punching mechanism is provided with multiple punching rods 17. The top of the deep punch 20 is provided with multiple clearance holes for the punching rods 17 to pass through. When the fan housing is deep punched, the punching rods 17 are inserted into the clearance holes at the top of the deep punch 20. The bottom of the punching rods 17 is coplanar with the top of the deep punch 20. After the fan housing is deep punched, the punching rods 17 pass through the clearance holes and extend into the deep punch 20. The length of the punching rods 17 in the deep punch 20 is greater than the length of the punch 9.

[0034] Example 2, as Figures 4-5 As shown, the present invention proposes an aluminum alloy fan housing forming device with good pressure resistance and sealing performance. Compared with Embodiment 1, this embodiment details the structure of the punching and avoidance mechanism.

[0035] The punching avoidance mechanism includes a telescopic device a13 mounted on the base 1 via a support column 12, a support block 11 mounted on the top telescopic end of the telescopic device a13, and multiple push rods 10 mounted on the support block 11. The push rods 10 are inserted into the punch hole 9. When the fan housing is deep-drawn, the upper end face of the push rod 10 is coplanar with the top surface of the lower die 8. When the formed fan housing is punched, the telescopic device a13 retracts, and the push rod 10 is moved out of the punch hole 9 via the support block 11, so that the punching waste can pass through the punch hole 9 and fall onto the base 1. In order to allow the punching waste to fall smoothly onto the base 1, the support block 11 is designed to be conical. In an optional embodiment, the telescopic device a13 is a hydraulic lifting structure.

[0036] Example 3, as Figure 4 As shown, the present invention proposes an aluminum alloy fan housing forming device with good pressure resistance and sealing performance. Compared with Embodiment 1, this embodiment details the structure of the punching mechanism.

[0037] The punching mechanism includes a lifting plate 15 that slides vertically within a mounting groove 14, multiple punching rods 17 at the bottom of the lifting plate 15, a push plate 18 positioned above the lifting plate 15 that moves horizontally to drive the lifting plate 15 up and down, and a telescopic device b19 on the inner wall of the mounting groove 14 that drives the push plate 18 to move laterally. The telescopic device b19 is a hydraulic telescopic structure. Both the lifting plate 15 and the push plate 18 are triangular plates with their inclined surfaces touching each other. One inclined surface has a groove, and the other has a rail. The rail and groove cooperate with each other, and the push plate 18 moves left and right to drive the lifting plate 15 to move up and down. In an optional embodiment, multiple guide rods 16 are vertically arranged at the bottom of the mounting groove 14, and multiple guide holes that cooperate with the guide rods 16 are provided on the lifting plate 15 to realize the lifting of the lifting plate 15.

[0038] Example 4, as Figures 2-4 As shown, the present invention proposes an aluminum alloy fan housing forming device with good pressure resistance and sealing performance. Compared with Embodiment 3, this embodiment details the automatic discharge structure.

[0039] It also includes an auxiliary lifting platform 23, which is vertically movable on the base 1. The auxiliary lifting platform 23 is annular, with its inner circle larger than the maximum cross-sectional size of the lower die 8. A cutting ring 24 is provided on the auxiliary lifting platform 23, and a circular ring that mates with the cutting ring 24 is provided at the bottom of the upper die 6. During stamping, the circular ring is located at the cutting ring 24, and the stamped sheet is cut into a circular cut through the cooperation of the circular ring and the cutting ring 24. The lifting structure of the auxiliary lifting platform 23 is as follows: multiple guide cylinders 26 are vertically arranged at the bottom of the auxiliary lifting platform 23, and the base 1 is provided with guide cylinders. The guide cylinder 26 is inserted into the vertical hole to form a guide. A damper 25 is installed in the vertical hole. The damper passes through the guide cylinder 26 and is connected to the auxiliary lifting platform 23. A spring 27 is sleeved on the guide cylinder 26. The two ends of the spring 27 are connected to the auxiliary lifting platform 23 and the base 1, respectively. In order to accurately position the highest position of the auxiliary lifting platform 23, a limiting plate a28 is set at the bottom of the auxiliary lifting platform 23. The limiting plate a28 is L-shaped. A limiting plate b29 is set on the base 1. The limiting plate b29 blocks the limiting plate a28 to determine the maximum height of the auxiliary lifting platform 23.

[0040] A fixed column 30 is set on the base 1, and an electromagnet 31 is set on the top of the fixed column 30. A magnetic plate is set on the bottom of the auxiliary lifting platform 23, which is located directly above the electromagnet 31. A distance measuring device 22 is set on the base 1 to measure the height of the auxiliary lifting platform 23. In order to prevent human interference with the data measurement of the distance measuring device 22, a protective cylinder 21 is set on the base 1, and the distance measuring device 22 is located inside the protective cylinder 21.

[0041] Furthermore, it also includes a control system, which is connected to the distance measuring device 22 for data transmission, and is also connected to the lifting device 4, the electromagnet 31, the punching avoidance mechanism, and the punching mechanism.

[0042] Example 5: A method for forming an aluminum alloy fan housing according to the present invention, using the pressure-resistant and sealing aluminum alloy fan housing forming device of Example 4, specifically includes the following steps:

[0043] S1. Place the stamping sheet on the auxiliary lifting platform 23. Note that the stamping sheet must completely cover the cutting ring 24.

[0044] S2. When the lifting device 4 drives the lifting platform 5 to the lowest point, the deep drawing of the fan plate is completed. At this time, the ranging device 22 detects that the auxiliary lifting platform 23 is at the lowest point, and the electromagnet 31 is activated to attract and hold the auxiliary lifting platform 23.

[0045] S3. After deep drawing, the lifting device 4 drives the lifting platform 5 and the upper die 6 to rise a certain distance. It is only necessary to ensure that the punching rod 17 can be inserted into the deep punch hole 20 to the required length. Then the punching mechanism makes the punching rod 17 extend into the deep punch hole 20. Specifically, the telescopic device b19 extends to move the push plate 18 to the left, and then drives the lifting plate 15 to move downward to extend the punching rod 17 into the deep punch hole 20. The punching avoidance mechanism exposes the punch hole 9. Specifically, the telescopic device a13 retracts to make the push rod 10 disengage from the punch hole 9. In this state, the auxiliary lifting platform 23 is attracted and immobilized by the electromagnet 31, which can prevent the fan housing from disengaging from the lower die 8.

[0046] S4. Then, the lifting device 4 drives the upper mold 6 to descend to the lowest point to complete the punching of the fan housing. After that, the lifting device 4 drives the upper mold 6 to rise to the highest position.

[0047] S5. When the ranging device 22 detects that the lifting platform 5 is at its highest point, the electromagnet 31 is de-energized, and the auxiliary lifting platform 23 moves upward under the action of the spring 27, pushing the deep-drawn and punched fan housing upward, completing the automatic separation of the stamped part from the lower die 8. The telescopic devices a13 and b19 are reset, and finally the fan housing can be removed.

[0048] In summary, when using this invention, the upper die 6 and lower die 8 are first used to complete the deep drawing of the fan sheet metal, forming a barrel-shaped fan housing structure. Then, the lifting device 4 drives the lifting platform 5 and the upper die 6 to rise a certain distance. Next, the punching mechanism causes the punching rod 17 to extend into the deep punch hole 20, and the punching clearance mechanism exposes the punch hole 9. In this state, the auxiliary lifting platform 23 is held still by the electromagnet 31. Then, the lifting device 4 drives the upper die 6 to descend to the lowest point, completing the punching of the fan housing. Finally, the entire equipment is reset. By concentrating the deep drawing and punching of the fan housing in the same stamping process, the stamping efficiency is effectively improved. During deep drawing, because the ejector rod 10 is inserted into the punch hole 9 and the punching rod 17 is inserted into the clearance hole of the deep punch hole 20, the complete deep drawing structure of the die is ensured, thus guaranteeing the deep drawing effect. After deep drawing, before punching, the upper die 6 needs to be moved upwards a certain distance to release the pressure on the fan housing, allowing it to return to a free state and fully release stress before punching, ensuring the quality of the punching.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A forming method of an aluminum alloy fan shell, using an aluminum alloy fan shell forming device with good pressure resistance and sealing performance, the device comprising a base (1) on which a plurality of guide columns (2) are vertically arranged, a top platform (3) arranged at the top of the guide columns (2), a lifting platform (5) arranged on the guide columns (2) to slide in the vertical direction, and a lifting device (4) arranged at the bottom of the top platform (3) to drive the lifting platform (5) to lift; further comprising: an upper die (6) arranged at the bottom of the lifting platform (5), the bottom of the upper die (6) being provided with a deep drawing hole (20), and the top of the upper die (6) being provided with a mounting groove (14); a lower die (8) arranged on the base (1), the top of the lower die (8) being provided with a plurality of punching holes (9); a punching avoidance mechanism comprising a telescopic device a (13) arranged on the base (1) through a support column (12); a punching mechanism arranged in the mounting groove (14), the punching mechanism being provided with a plurality of punching rods (17), the punching mechanism comprising a lifting plate (15) arranged in the mounting groove (14) to slide in the vertical direction, a plurality of punching rods (17) arranged at the bottom of the lifting plate (15), a push plate (18) arranged above the lifting plate (15) to drive the lifting plate (15) to move up and down through horizontal movement, and a telescopic device b (19) arranged on the inner wall of the mounting groove (14) to drive the push plate (18) to move laterally; and an auxiliary lifting platform (23), a fixed column (30) being arranged on the base (1), an electromagnet (31) being arranged at the top of the fixed column (30), and a magnetic plate being arranged at the bottom of the auxiliary lifting platform (23) directly above the electromagnet (31); a distance measuring device (22) being arranged on the base (1) to measure the height of the auxiliary lifting platform (23); the forming method of the aluminum alloy fan shell comprising the following steps: S1, placing a stamping plate on the auxiliary lifting platform (23); S2, when the lifting device (4) drives the lifting platform (5) to drop to the lowest point, deep drawing of the fan plate is completed, at this time the distance measuring device (22) detects that the auxiliary lifting platform (23) is at the lowest point, and the electromagnet (31) is activated to attract the auxiliary lifting platform (23); S3, after deep drawing is completed, the lifting device (4) drives the lifting platform (5) and the upper die (6) to rise by a distance, then the punching mechanism makes the punching rods (17) extend into the deep drawing hole (20), and the punching avoidance mechanism exposes the punching holes (9), in this state the auxiliary lifting platform (23) is attracted by the electromagnet (31) and does not move; S4, then the lifting device (4) drives the upper die (6) to drop to the lowest point, punching of the fan shell is completed, then the lifting device (4) drives the upper die (6) to rise to the highest position; S5, when the distance measuring device (22) detects that the lifting platform (5) has reached the highest position, the electromagnet (31) is powered off, the auxiliary lifting platform (23) moves up, the fan shell after deep drawing and punching is pushed upward, automatic separation of the stamping part from the lower die (8) is completed, and the telescopic device a (13) and the telescopic device b (19) are reset.

2. The method of forming an aluminum alloy fan case of claim 1 wherein, The deep punching hole (20) is provided with a plurality of avoiding holes at the top for the punching rod (17) to pass through. When the fan shell is deep punched, the punching rod (17) is inserted into the avoiding hole at the top of the deep punching hole (20), the bottom of the punching rod (17) is coplanar with the top of the deep punching hole (20), and after the deep punching of the fan shell is completed, the punching rod (17) passes through the avoiding hole and extends into the deep punching hole (20).

3. The method of forming an aluminum alloy fan case of claim 1 wherein, The punching avoiding mechanism is arranged on the base (1) and is used to close the punching hole (9) when the fan shell is deep punched, and is exposed when the punching hole (9) is punched after the deep punching of the fan shell is completed. The punching avoiding mechanism further comprises a supporting block (11) arranged at the top of the telescopic device a (13) and a plurality of jacks (10) arranged on the supporting block (11), and the jacks (10) are inserted into the punching hole (9) in cooperation.

4. The method of forming an aluminum alloy fan case of claim 1 wherein, The auxiliary lifting platform (23) is arranged on the base (1) and moves in the vertical direction. The auxiliary lifting platform (23) is annular, the inner circle is larger than the maximum cross-sectional dimension of the lower die (8), and the auxiliary lifting platform (23) is provided with a cutting ring (24). The upper die (6) is provided with a circular ring which cooperates with the cutting ring (24).

5. The method of forming an aluminum alloy fan case of claim 4, wherein, The control system is further provided, which is in data transmission connection with the distance measuring device (22), and is in control connection with the lifting device (4), the electromagnet (31), the punching avoiding mechanism and the punching mechanism.

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