Modularized aluminum alloy stamping die core and stamping die

Abstract

The invention discloses a modularized aluminum alloy stamping die core and a stamping die. The modularized aluminum alloy stamping die core comprises a lower die core and an upper die core, the lower die core comprises a lower shell, a plurality of first mounting cavities are formed in the lower shell, lower punching units are mounted in the first mounting cavities and comprise punches and bottom covers, the lower ends of the punches are in threaded connection with the bottom covers, and the punches can rotate, so that the upper ends of the punches are higher than the upper surface of the lower shell or flush with the upper surface of the lower shell; the upper die core comprises an upper shell, an upper punching unit corresponding to the lower punching unit is fixed in the upper shell, the upper punching unit comprises a punching sleeve in threaded connection with the upper shell, the lower portion of the punching sleeve is flush with the lower portion of the upper shell, and a punching groove consistent with the punch in section shape is formed in the punching sleeve. The upper end of the punch can be inserted into the punching groove. The upper die core and the lower die core can be independently replaced, the upper stamping unit and the lower stamping unit can be independently replaced, and stamping machining of holes of different shapes and different distances can be achieved without replacing the whole set of die.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy stamping equipment, and more specifically, to a modular aluminum alloy stamping die core and a stamping die. Background Art

[0002] At present, punching on the surface of aluminum alloy mainly uses a one-time multi-punching device for processing. This device has a low cost and can punch multiple holes on the surface of aluminum alloy at one time. However, the disadvantage is that the sizes of the upper and lower dies are large, which is not only inconvenient for maintenance, but also very inconvenient to replace when different holes need to be punched. Moreover, the punching effect is single, and it is impossible to realize the punching processing of holes with different shapes and different distances. Therefore, there is an urgent need to improve this. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a modular aluminum alloy stamping die core and a stamping die. Through the settings that the upper and lower die cores can be replaced separately and the upper and lower stamping units can be replaced separately, it is possible to realize the punching processing of holes with different shapes and different distances without replacing the whole set of dies.

[0004] To achieve the above purpose, the present invention adopts the following technical scheme: A modular aluminum alloy stamping die core, comprising a lower die core and an upper die core;

[0005] The lower die core includes a lower housing, and a plurality of first installation cavities are provided in the lower housing. A lower stamping unit is installed in the first installation cavity. The lower stamping unit includes a punch and a bottom cover. The lower end of the punch is threadedly connected to the bottom cover, and the punch can rotate so that the upper end of the punch is higher than the upper surface of the lower housing or flush with the upper surface of the lower housing;

[0006] The upper die core includes an upper housing, and an upper stamping unit corresponding to the lower stamping unit is fixed in the upper housing. The upper stamping unit includes a punch sleeve threadedly connected to the upper housing. The lower part of the punch sleeve is flush with the lower part of the upper housing. An inner punch groove with a cross-sectional shape consistent with that of the punch is provided in the punch sleeve. When the lower part of the upper die core abuts against the upper part of the lower die core, the upper end of the punch can be inserted into the punch groove.

[0007] Further, the bottom cover covers the lower part of the first installation cavity and is threadedly connected to the inner wall of the first installation cavity on the side. A threaded groove is provided inside the bottom cover. A threaded post is provided at the lower part of the punch. The threaded post is threadedly connected to the threaded groove. A groove is provided inside the punch, and the cross-section of the groove is non-circular.

[0008] Further, the lower stamping unit includes a support sleeve. The support sleeve is sleeved outside the punch. The support sleeve can move up and down so that its upper end is higher than the upper part of the lower housing or flush with the upper part of the lower housing, and the upper end of the punch can be flush with the upper part of the support sleeve.

[0009] Further, a first spring is provided inside the first installation cavity. The upper part of the first spring abuts against the lower part of the support sleeve, and the lower part abuts against the upper part of the bottom cover. An annular surface is provided on the inner side of the upper part of the first installation cavity. The support sleeve includes an installation hole and a first limiting platform. A support platform is provided on the upper part of the first limiting platform. The upper part of the first limiting platform can abut against or disengage from the lower part of the annular surface. The support platform penetrates through the annular surface. The punch penetrates through the installation hole, and the cross-section of the installation hole is the same as that of the punch.

[0010] Further, a transfer sleeve is inserted inside the punch sleeve, and an avoidance hole is provided inside the transfer sleeve.

[0011] A modular aluminum alloy stamping die includes a lower die assembly and an upper die assembly;

[0012] The lower die assembly includes a lower template. A plurality of first installation grooves are provided inside the lower template. A lower die core is installed in each first installation groove. The upper part of the lower shell is flush with the upper surface of the lower template;

[0013] The upper die assembly includes an upper template. The upper template includes second installation grooves corresponding to the first installation grooves. An upper die core is installed in the second installation grooves. The lower part of the upper die core is flush with the lower surface of the upper template. The lower stamping units of the lower die cores correspond to the upper stamping units of the upper die cores one by one. The upper die assembly can move up and down so that the lower surface of the upper template abuts against or disengages from the upper surface of the lower template.

[0014] Further, an annular groove is provided at the bottom of the first installation groove. A second spring is installed in the annular groove. The upper part of the second spring abuts against the lower part of the lower die core. An electromagnet is installed at the bottom of the first installation groove. The electromagnet and the lower part of the lower die core can be attracted and fixed;

[0015] A limiting groove is provided at the upper part of the first installation groove. The upper shell includes a second limiting platform. The second limiting platform is located in the limiting groove and its lower part abuts against the upper part of the first installation groove.

[0016] Further, positioning ribs are provided on the upper surface of the lower template, and convex platforms are provided on the lower surface of the upper template. The lower part of the upper die core is flush with the lower surface of the convex platform. The lower part of the convex platform can be inserted into the positioning ribs. Guide columns are provided near the four corners of the upper part of the lower template. The guide columns penetrate through the upper template.

[0017] Furthermore, the upper template moves up and down through a stamping mechanism, and the stamping mechanism includes a first pressure plate, a second pressure plate and a first driver. The lower part of the first pressure plate abuts against the upper part of the upper template and is fixed to the upper template by screws. A first limiting shaft is provided at the upper part of the first pressure plate near both sides. The first pressure plate and the second pressure plate are connected through the first limiting shaft. The upper end of the first limiting shaft passes through the second pressure plate. A third spring is sleeved on the outer side of the first limiting shaft. The lower end of the third spring abuts against the upper part of the first pressure plate and the upper end abuts against the lower part of the second pressure plate. The first driver is connected to the second pressure plate.

[0018] Furthermore, the upper mold assembly also includes a pushing mechanism, which includes a pushing plate and a support plate, the pushing plate is located between the first pressure plate and the second pressure plate, the support plate is located outside the stamping mechanism, the lower part of the support plate is fixedly connected to the side of the upper mold plate, the upper part of the pushing plate is fixed with a second driver, the second driver passes through the second pressure plate and the protruding end is fixedly connected to the upper part of the support plate, the lower part of the pushing plate is provided with a pin corresponding to the upper stamping unit, the lower end of the pin is inserted into the punching groove, and the second driver can drive the pin to move up and down.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. By setting a modular lower die core in the lower die assembly and a modular upper die core in the upper die assembly, the lower die core and the upper die core can be disassembled and assembled separately, which is convenient for maintenance. By replacing the corresponding lower die core and the upper die core, the stamping processing of holes of different shapes and different distances on the surface of the aluminum alloy sheet can be achieved without replacing the entire die, which greatly reduces the die cost;

[0021] 2. The shape of the punch can be replaced according to the punching requirements. The specific operation is to remove the lower die from the lower template, and then unscrew the bottom cover where the punch needs to be replaced from the lower shell. At this time, the punch can be removed and replaced. This method can not only replace punches of different shapes, thereby realizing the punching operation of holes of different shapes in the sheet, but also replace the punch when it is damaged. It is not only convenient to operate, but also greatly reduces the maintenance cost of the mold; the groove is a regular hexagon. When the hole distance between the processed holes needs to be expanded, there is no need to remove the lower die, and only the hexagonal wrench needs to be inserted into the groove. The punch is screwed in and the punch is turned to make the punch go down. The upper surface of the punch is flush with the upper surface of the lower template. The punch cannot punch the surface of the sheet at this point, so that the hole distance between the processed holes can be expanded, which is convenient for operation. The shape of the punch sleeve can be replaced according to the shape of the punch. The specific operation is that after the first pressing plate and the upper template are separated, the corresponding upper die core is taken out, and the corresponding punch sleeve is screwed out with a screwdriver, and then the punch sleeve with a groove corresponding to the shape of the punch is installed in the upper die core. When punching, the lower part of the lower die core abuts and pushes the support sleeve down, and the punch is inserted into the groove to punch the sheet. Brief Description of the Drawings

[0022] Figure 1 is a schematic structural view of a stamping die;

[0023] Figure 2 is a sectional view of the stamping die;

[0024] Figure 3 is Figure 2 a partial schematic view of;

[0025] Figure 4 is Figure 2 a partial schematic view of;

[0026] Figure 5 is a partial sectional view when stamping an aluminum alloy sheet;

[0027] Figure 6 is a schematic structural view of the lower die assembly;

[0028] Figure 7 is a schematic structural view of the lower template;

[0029] Figure 8 is an exploded view of the upper die assembly;

[0030] Figure 9 is an exploded view of the lower die core;

[0031] Figure 10 is a schematic structural view of the upper die core;

[0032] Figure 11 is a schematic structural view of a form of the aluminum alloy sheet after stamping.

[0033] Reference numerals: 1, lower housing; 11, first installation cavity; 12, annular surface; 2, lower stamping unit; 21, punch; 211, threaded post; 212, groove; 22, support sleeve; 221, first limiting platform; 222, support platform; 223, installation hole; 23, bottom cover; 231, threaded groove; 24, first spring; 3, upper housing; 31, second limiting platform; 4, upper stamping unit; 41, punch sleeve; 411, punching groove; 42, adapter sleeve; 421, avoidance hole; 5, lower template; 51, first installation groove; 52, guiding post; 53, positioning rib; 54, second spring; 55, electromagnet; 56, annular groove; 6, upper template; 61, second installation groove; 62, limiting groove; 63, boss; 7, stamping mechanism; 71, first pressing plate; 72, first limiting shaft; 73, third spring; 74, second pressing plate; 75, first driver; 76, second limiting shaft; 77, fourth spring; 8, material pushing mechanism; 81, material pushing plate; 82, ejector pin; 83, support plate; 84, second driver; 9, sheet material; 91, processing hole; 1000, lower die core; 2000, upper die core; 3000, lower die assembly; 4000, upper die assembly. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] As Figures 1 to 11 shown, this embodiment discloses a modular aluminum alloy stamping die, including a lower die assembly 3000 and an upper die assembly 4000;

[0036] The lower die assembly 3000 includes a lower template 5. A plurality of first installation grooves 51 are provided in the lower template 5, and a lower die core 1000 is installed in each first installation groove 51. The upper part of the lower housing 1 is flush with the upper surface of the lower template 5;

[0037] The upper die assembly 4000 is located above the lower die assembly 3000. The upper die assembly 4000 includes an upper template 6. The upper template 6 includes a second installation groove 61 corresponding to the first installation groove 51. An upper die core 2000 is installed in the second installation groove 61. The lower part of the upper die core 2000 is flush with the lower surface of the upper template 6. The lower stamping unit 2 of the lower die core 1000 corresponds to the upper stamping unit 4 of the upper die core 2000 one by one. The upper die assembly 4000 can move up and down so that the lower surface of the upper template 6 abuts against or disengages from the upper surface of the lower template 5. Specifically, the upper template 6 moves up and down through a stamping mechanism 7. The stamping mechanism 7 includes a first pressing plate 71, a second pressing plate 74 and a first driver 75. The first driver 75 is a prior art, preferably an oil cylinder. The lower part of the first pressing plate 71 abuts against the upper part of the upper template 6 and is fixed to the upper template 6 by screws. First limiting shafts 72 are provided near both sides of the upper part of the first pressing plate 71. The first pressing plate 71 and the second pressing plate 74 are connected through the first limiting shafts 72. The cross section of the first limiting shaft 72 is T-shaped. The upper end of the first limiting shaft 72 penetrates through the second pressing plate 74. A third spring 73 is sleeved outside the first limiting shaft 72. The lower end of the third spring 73 abuts against the upper part of the first pressing plate 71 and the upper end abuts against the lower part of the second pressing plate 74. The first driver 75 is connected to the second pressing plate 74. The first driver 75 is fixed to a stamping device (not shown in the figure).

[0038] As Figure 1 shown, when it is necessary to punch the surface of the aluminum alloy sheet 9, the aluminum alloy sheet 9 is placed on the upper surface of the lower template 5. The first driver 75 pushes the second pressing plate 74 to descend. The second pressing plate 74 then pushes the first pressing plate 71 and the upper template 6 to descend. Through the cooperation of the lower die core 1000 and the upper die core 2000, multiple processing holes 91 can be punched on the surface of the sheet 9 at one time. By providing the first limiting shafts 72 and the third spring 73, a buffering effect can be achieved, thus having a protective effect on the lower template 5 and the upper template 6.

[0039] As Figures 3 to 5As shown, a circular groove 56 is provided at the bottom of the first installation groove 51. A second spring 54 is installed in the circular groove 56. The upper part of the second spring 54 abuts against the lower part of the lower die insert 1000. An electromagnet 55 is installed at the bottom of the first installation groove 51. The electromagnet 55 and the lower part of the lower die insert 1000 can be attracted and fixed. When the lower die insert 1000 is installed in the first installation groove 51, the electromagnet 55 is powered on. The electromagnet 55 attracts the lower die insert 1000 and compresses the second spring 54 to fix the lower die insert 1000. When the lower die insert 1000 needs to be replaced, only the electromagnet 55 needs to be powered off. The electromagnet 55 and the lower die insert 1000 are not attracted. At this time, the lower die insert 1000 is subjected to the elastic force of the second spring 54 and can move upward, making the upper part of the lower die insert 1000 higher than the upper surface of the lower template 5, so as to facilitate the removal of the lower die insert 1000 from the first installation groove 51, and the operation is convenient;

[0040] A limiting groove 62 is provided at the upper part of the first installation groove 51. The upper shell 3 includes a second limiting platform 31. The second limiting platform 31 is located in the limiting groove 62 and the lower part abuts against the upper part of the first installation groove 51. The lower part of the first pressing plate 71 abuts against the upper part of the upper template 6 and is fixed to the upper template 6 by screws. When the upper die insert 2000 needs to be replaced, only the screws connecting the first pressing plate 71 and the upper template 6 need to be removed to separate the upper template 6 from the stamping mechanism 7, exposing the upper die insert 2000. At this time, only a pushing force is applied to the upper die insert 2000 from bottom to top, and the upper die insert 2000 can be removed from the first installation groove 51, and the operation is convenient;

[0041] It can be seen that by setting the modular lower die insert 1000 in the lower die assembly 3000 and the modular upper die insert 2000 in the upper die assembly 4000, the separate disassembly and assembly of the lower die insert 1000 and the upper die insert 2000 can be realized, which is convenient for maintenance. And by replacing the corresponding lower die insert 1000 and upper die insert 2000, the stamping processing of holes with different shapes and different distances on the surface of the aluminum alloy sheet 9 can be realized without replacing the whole die, greatly reducing the die cost.

[0042] As Figure 1 and Figure 2 shown, positioning ribs 53 are provided on the upper surface of the lower template 5, and a boss 63 is provided on the lower surface of the upper template 6. The lower part of the upper die insert 2000 is flush with the lower surface of the boss 63. The lower part of the boss 63 can be inserted into the positioning ribs 53. When processing the sheet 9, the sheet 9 needs to be placed in the area surrounded by the positioning ribs 53, and the sheet 9 is limited by the positioning ribs 53, so as to improve the consistency of the sheet 9 processing.

[0043] At the upper part of the lower template 5 near the four corners, there are guide posts 52 which can penetrate through the upper template 6 and the first pressing plate 71. By arranging the guide posts 52, a guiding effect can be achieved, and the matching precision during stamping of the lower die assembly 3000 and the upper die assembly 4000 can be improved.

[0044] As Figures 3 - 5 and Figure 9 shown, the lower die core 1000 includes a lower shell 1. A plurality of first installation cavities 11 are provided inside the lower shell 1, and lower stamping units 2 are installed in the first installation cavities 11. In the present invention, each lower shell 1 is equidistantly provided with nine first installation cavities 11, that is, nine lower stamping units 2 are installed in each lower shell 1. The lower stamping unit 2 includes a punch 21 and a bottom cover 23. The lower end of the punch 21 is threadedly connected to the bottom cover 23, and the punch 21 can rotate so that the upper end of the punch 21 is higher than the upper surface of the lower shell 1 or flush with the upper surface of the lower shell 1. Specifically, the bottom cover 23 covers the lower part of the first installation cavity 11 and its side surface is threadedly connected to the inner wall of the first installation cavity 11. A threaded groove 231 is provided inside the bottom cover 23, and a threaded post 211 is provided at the lower part of the punch 21. The threaded post 211 is threadedly connected to the threaded groove 231. A groove 212 is provided inside the punch 21, and the cross-section of the groove 212 is non-circular. The cross-sectional shape of the punch 21 can be various shapes such as circular, star-shaped, polygonal, etc. The shape of the punch 21 is the shape of the processing hole 91 of the sheet 9. In the present invention, the lower stamping unit 2 is a replaceable design. Specifically, the shape of the punch 21 can be replaced according to the punching requirements. The specific operation is as follows: After taking out the lower die core 1000 from the lower template 5, unscrew the bottom cover 23 at the place where the punch 21 needs to be replaced from the lower shell 1, and at this time, the punch 21 at this place can be taken off for replacement. This method can not only replace punches 21 of different shapes to realize stamping operations of different-shaped holes on the sheet 9, but also replace the punch 21 when the punch 21 is damaged. It is not only convenient to operate, but also greatly reduces the maintenance cost of the mold; the groove 212 is a regular hexagon. When it is necessary to increase the hole pitch between the processing holes 91, it is not necessary to disassemble the lower die core 1000. Only need to insert an inner hexagon wrench into the groove 212 and turn the punch 21 so that the punch 21 descends and the upper surface of the punch 21 is flush with the upper surface of the lower template 5. The punch 21 at this place cannot punch the surface of the sheet 9, so that the hole pitch between the processing holes 91 can be increased, and the operation is convenient.

[0045] The lower stamping unit 2 includes a support sleeve 22 sleeved outside the punch 21. The support sleeve 22 can move up and down so that its upper end is higher than or flush with the upper part of the lower housing 1. The upper end of the punch 21 can be flush with the upper part of the support sleeve 22. Specifically, a first spring 24 is arranged inside the first installation cavity 11. The upper part of the first spring 24 abuts against the lower part of the support sleeve 22 and the lower part abuts against the upper part of the bottom cover 23. An annular surface 12 is arranged on the inner side of the upper part of the first installation cavity 11. The support sleeve 22 includes an installation hole 223 and a first limiting platform 221. A support platform 222 is arranged on the upper part of the first limiting platform 221. The upper part of the first limiting platform 221 can abut against or disengage from the lower part of the annular surface 12. The support platform 222 penetrates through the annular surface 12. The punch 21 penetrates through the installation hole 223. The cross section of the installation hole 223 is the same as that of the punch 21. The cross section of the support sleeve 22 is circular. When the lower stamping unit 2 is in the punching state, the upper surface of the punch 21 is higher than the upper surface of the lower housing 1 and flush with the upper surface of the support sleeve 22. Since the position of the punch 21 when not in the punching state is lower than that of the punch 21 in the punching state, when the sheet 9 is placed on the uneven punch 21, unevenness may occur, affecting the punching effect. Therefore, the support sleeve 22 is provided. When punching the sheet 9, the sheet 9 is placed on the upper surface of the support sleeve 22. By providing the support sleeve 22, the support area of the sheet 9 can be increased, and the flatness during placement can be improved, thus ensuring the punching effect.

[0046] As Figure 4 and Figure 5 shown, the upper die core 2000 includes an upper housing 3. An upper stamping unit 4 corresponding to the lower stamping unit 2 is fixed inside the upper housing 3. The upper stamping unit 4 includes a punch sleeve 41 threadedly connected to the upper housing 3. The lower part of the punch sleeve 41 is flush with the lower part of the upper housing 3. A punch groove 411 with the same cross-sectional shape as the punch 21 is arranged inside the punch sleeve 41. When the lower part of the upper die core 2000 abuts against the upper part of the lower die core 1000, the upper end of the punch 21 can be inserted into the punch groove 411. Specifically, in the present invention, the upper stamping unit 4 is also a replaceable design. Specifically, the shape of the punch sleeve 41 can be replaced according to the shape of the punch 21. The specific operation is as follows: after separating the first pressing plate 71 and the upper template 6, take out the corresponding upper die core 2000, use a screwdriver to screw out the corresponding punch sleeve 41, and then install the punch sleeve 41 with a punch groove 411 corresponding to the shape of the punch 21 into the upper die core 2000. When punching, the lower part of the upper die core 2000 abuts against and pushes the support sleeve 22 to descend, and the punch 21 is inserted into the punch groove 411, thereby punching the sheet 9.

[0047] An adapter sleeve 42 is inserted inside the punching sleeve 41 . When the punching slot 411 does not need to be punched, the adapter sleeve 42 of the corresponding model can be replaced so that the lower surface of the adapter sleeve 42 is flush with the lower surface of the upper shell 3 to block the punching slot 411 .

[0048] like Figure 5 As shown, since the punching groove 411 is located at the top, when the punch 21 is punching, the waste material will be embedded in the punching groove 411, so it is necessary to use the pushing mechanism 8 to push out the waste material embedded in the punching groove 411. Specifically, the pushing mechanism 8 includes a pushing plate 81 and a support plate 83. The pushing plate 81 is located between the first pressure plate 71 and the second pressure plate 74. When the second pressure plate 74 drops to the lowest position, it will not contact the pushing plate 81. The support plate 83 is located on the outside of the stamping mechanism 7. The lower part of the support plate 83 is fixedly connected to the side of the upper template 6 by screws, and the support plate 83 does not contact the stamping mechanism 7. A second driver 84 is fixed to the upper part of the pushing plate 81. The second driver 84 passes through the second pressure plate 74 and the protruding end is fixedly connected to the upper part of the support plate 83. The second driver 84 does not contact the second pressure plate 74. The second driver 84 is a prior art, preferably an oil The locking cam 77 is provided on the outer side of the locking cam 76, and the locking cam 76 is provided with a spring 77 which abuts against the lower portion of the locking cam 81 and the lower portion of the locking cam 81.

[0049] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A modular aluminum alloy stamping die core, characterized in that It includes a lower die insert (1000) and an upper die insert (2000); The lower die insert (1000) includes a lower housing (1). A plurality of first installation cavities (11) are provided inside the lower housing (1). A lower stamping unit (2) is installed inside the first installation cavities (11). The lower stamping unit (2) includes a punch (21) and a bottom cover (23). The lower end of the punch (21) is threadedly connected to the bottom cover (23). The punch (21) can rotate so that the upper end of the punch (21) is higher than the upper surface of the lower housing (1) or flush with the upper surface of the lower housing (1); The upper die insert (2000) includes an upper housing (3). An upper stamping unit (4) corresponding to the lower stamping unit (2) is fixed inside the upper housing (3). The upper stamping unit (4) includes a punch sleeve (41) threadedly connected to the upper housing (3). The lower part of the punch sleeve (41) is flush with the lower part of the upper housing (3). A punch groove (411) with the same cross-sectional shape as the punch (21) is provided inside the punch sleeve (41). When the lower part of the upper die insert (2000) abuts against the upper part of the lower die insert (1000), the upper end of the punch (21) can be inserted into the punch groove (411).

2. The modular aluminum alloy stamping die core according to claim 1, wherein, The bottom cover (23) covers the lower part of the first installation cavity (11) and is threadedly connected to the inner wall of the first installation cavity (11) on the side. A threaded groove (231) is provided inside the bottom cover (23). A threaded post (211) is provided at the lower part of the punch (21). The threaded post (211) is threadedly connected to the threaded groove (231). A groove (212) is provided inside the punch (21). The cross-section of the groove (212) is non-circular.

3. The modular aluminum alloy stamping die core according to claim 2, characterized in that, The lower stamping unit (2) includes a support sleeve (22). The support sleeve (22) is sleeved outside the punch (21). The support sleeve (22) can move up and down so that its upper end is higher than the upper part of the lower housing (1) or flush with the upper part of the lower housing (1). The upper end of the punch (21) can be flush with the upper part of the support sleeve (22).

4. A modular aluminum alloy stamping die core according to claim 3, characterized in that, A first spring (24) is provided inside the first installation cavity (11). The upper part of the first spring (24) abuts against the lower part of the support sleeve (22) and the lower part abuts against the upper part of the bottom cover (23). An annular surface (12) is provided on the inner side of the upper part of the first installation cavity (11). The support sleeve (22) includes an installation hole (223) and a first limiting platform (221). A support platform (222) is provided on the upper part of the first limiting platform (221). The upper part of the first limiting platform (221) can abut against or disengage from the lower part of the annular surface (12). The support platform (222) penetrates through the annular surface (12). The punch (21) penetrates through the installation hole (223). The cross-section of the installation hole (223) is the same as the cross-section of the punch (21).

5. A modular aluminum alloy stamping die core according to claim 1, characterized in that, A transfer sleeve (42) is inserted inside the punch sleeve (41). An avoidance hole (421) is provided inside the transfer sleeve (42).

6. A modular aluminum alloy stamping die, which is made of a modular aluminum alloy stamping die core as described in any one of claims 1-5, characterized in that, It includes a lower die assembly (3000) and an upper die assembly (4000); The lower die assembly (3000) includes a lower template (5). A plurality of first installation grooves (51) are provided in the lower template (5), and a lower die core (1000) is installed in each first installation groove (51). The upper part of the lower housing (1) is flush with the upper surface of the lower template (5). The upper die assembly (4000) includes an upper template (6). The upper template (6) includes second installation grooves (61) corresponding to the first installation grooves (51), and an upper die core (2000) is installed in the second installation grooves (61). The lower part of the upper die core (2000) is flush with the lower surface of the upper template (6). The lower stamping units (2) of the lower die core (1000) correspond to the upper stamping units (4) of the upper die core (2000) one by one. The upper die assembly (4000) can move up and down so that the lower surface of the upper template (6) abuts against or disengages from the upper surface of the lower template (5).

7. A modular aluminum alloy stamping die according to claim 6, characterized in that, An annular groove (56) is provided at the bottom of the first installation groove (51), and a second spring (54) is installed in the annular groove (56). The upper part of the second spring (54) abuts against the lower part of the lower die core (1000). An electromagnet (55) is installed at the bottom of the first installation groove (51), and the electromagnet (55) can be attracted and fixed to the lower part of the lower die core (1000). A limiting groove (62) is provided at the upper part of the first installation groove (51). The upper housing (3) includes a second limiting platform (31), and the second limiting platform (31) is located in the limiting groove (62) and its lower part abuts against the upper part of the first installation groove (51).

8. A modular aluminum alloy stamping die according to claim 7, characterized in that, Positioning ribs (53) are provided on the upper surface of the lower template (5), and a boss (63) is provided on the lower surface of the upper template (6). The lower part of the upper die core (2000) is flush with the lower surface of the boss (63). The lower part of the boss (63) can be inserted into the positioning ribs (53). Guide columns (52) are provided near the four corners of the upper part of the lower template (5), and the guide columns (52) penetrate through the upper template (6).

9. The modular aluminum alloy stamping die according to claim 7, characterized in that, The upper template (6) moves up and down through a stamping mechanism (7). The stamping mechanism (7) includes a first pressing plate (71), a second pressing plate (74) and a first driver (75). The lower part of the first pressing plate (71) abuts against the upper part of the upper template (6) and is fixed to the upper template (6) by screws. First limiting shafts (72) are provided near both sides of the upper part of the first pressing plate (71). The first pressing plate (71) and the second pressing plate (74) are connected by the first limiting shafts (72). The upper ends of the first limiting shafts (72) penetrate through the second pressing plate (74). A third spring (73) is sleeved on the outer side of the first limiting shafts (72). The lower end of the third spring (73) abuts against the upper part of the first pressing plate (71) and the upper end abuts against the lower part of the second pressing plate (74). The first driver (75) is connected to the second pressing plate (74).

10. A modular aluminum alloy stamping die according to claim 9, characterized in that, The upper mold assembly (4000) further comprises a pushing mechanism (8), wherein the pushing mechanism (8) comprises a pushing plate (81) and a supporting plate (83), wherein the pushing plate (81) is located between the first pressing plate (71) and the second pressing plate (74), wherein the supporting plate (83) is located outside the punching mechanism (7), wherein the lower portion of the supporting plate (83) is fixedly connected to the side surface of the upper mold plate (6), wherein the upper portion of the pushing plate (81) is fixedly provided with a second driver (84), wherein the second driver (84) passes through the second pressing plate (74) and the protruding end is fixedly connected to the upper portion of the supporting plate (83), wherein the lower portion of the pushing plate (81) is provided with an ejector pin (82) corresponding to the upper punching unit (4), wherein the lower end of the ejector pin (82) is inserted into the punching groove (411), and the second driver (84) can drive the ejector pin (82) to move up and down.

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