A stamping die based on compressed gas demoulding and its usage method

Abstract

The present invention discloses a stamping die based on compressed gas demoulding and its use method, belonging to the technical field of stamping dies. A stamping die based on compressed gas demoulding includes an upper die and a lower die, and further includes: a bottom plate arranged on the lower die, a processing table is provided on the bottom plate, a shaping block is provided on the bottom plate, the shaping block is placed at the central part of the processing table, a side ring is arranged outside the shaping block, and the side ring is arranged on the processing table; a pressing plate is arranged below the upper die, an outer sleeve is provided on the lower surface of the central part of the upper die, a blank holding block is arranged inside the outer sleeve, a movable hole is formed in the pressing plate, and the outer sleeve slides in the movable hole; The present invention can control the opening and closing of the air blowing holes, ensuring that during stamping, the outline of the air blowing holes will not be imprinted on the formed part, and ensuring the qualified rate of the formed part.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping dies, and particularly to a stamping die based on compressed gas demolding. Background Art

[0002] Stamping is a forming process method that uses a press and a die to apply external forces to plates, strips, tubes, profiles, etc., causing plastic deformation or separation to obtain workpieces (stamped parts) with the required shapes and sizes. Stamping usually includes five processes: sizing, drawing, flanging, trimming, and punching. The sizing die is mainly used to press the metal plate into the required shape, and sizing is often placed alone in the first process. The speed of sizing is crucial for the entire stamping process.

[0003] During the sizing process of the sizing die, due to the action of the stress of the upper stamping die, the stamped part is tightly attached to the surface of the lower die, resulting in the phenomenon that the die cannot be demolded. In this case, after the stamping is completed, compressed gas is generally released into the lower die through a compressed gas system, and these gases are discharged through preset air channels or pipes to the exhaust holes on the surface of the lower die, applying a thrust to the formed part. Under the action of the compressed gas, a sufficient separation force is generated between the formed part and the die, enabling the formed part to be smoothly demolded from the die. However, the exhaust holes are generally always open, which may cause the outline, grooves, and protrusions of the exhaust holes to be imprinted on the formed part during stamping. Especially when the die is not very flat, this problem often occurs, which is not conducive to the yield rate. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art, and a stamping die based on compressed gas demolding is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] It includes an upper die and a lower die, and further includes: a bottom plate disposed on the lower die, a processing table provided on the bottom plate, a shaping block provided on the bottom plate, the shaping block being placed at the central part of the processing table, a side ring provided around the shaping block, and the side ring being disposed on the processing table; a pressing plate is provided below the upper die, an outer sleeve is provided on the lower surface at the central part of the upper die, a blank holding block is arranged inside the outer sleeve, a movable hole is formed on the pressing plate, and the outer sleeve slides in the movable hole; a blowing hole is formed at the central part of the shaping block, a movable groove is formed below the blowing hole, a fixing plate is fixedly connected inside the movable groove, a hole is formed at the center of the fixing plate, a sliding rod is provided inside the movable groove, the sliding rod passes through the hole at the center of the fixing plate, a disc-shaped slider with a diameter consistent with that of the blowing hole is arranged at the top end of the sliding rod, a return spring is provided between the slider and the fixing plate, the return spring is sleeved on the sliding rod, a disc-shaped baffle with a diameter consistent with that of the cylindrical movable groove is arranged at the bottom end of the sliding rod, and the baffle is placed below the fixing plate; the movable groove is divided into two spaces by the fixing plate, the space above the fixing plate is a release space, the space below the fixing plate is a control space, the release space and the control space are communicated through a first air injection pipe and a second air injection pipe, and the control space is connected to an external air source through an air passage two.

[0007] Preferably, a force receiving end is provided on the upper die, a pressure rod is provided below the force receiving end, and the pressure rod is fixedly connected to the blank holding block.

[0008] Preferably, an installation hole and a retraction hole are respectively formed on the upper die, a sleeve is installed in the installation hole, a fixing rod is fixedly connected to the bottom plate, and the upper end of the fixing rod slides inside the sleeve.

[0009] Further, a retraction rod is inserted into the retraction hole, the bottom of the retraction rod is threadedly connected to the pressing plate, and a buffer spring is provided between the pressing plate and the upper die, and the buffer spring is sleeved on the retraction rod.

[0010] Preferably, a limiting groove is provided inside the outer sleeve, and the blank holding block is fixedly installed in the limiting groove.

[0011] Preferably, a limiting bolt is provided on the processing table.

[0012] Preferably, an adjusting rod is provided below the side ring, the adjusting rod penetrates through the lower die and the bottom plate, and an air passage one is provided inside the lower die and the bottom plate, and the air passage one is communicated with the air passage two.

[0013] Preferably, the release space above the fixing plate can be subdivided into two regions, namely a blowing region and a compression region, the blowing region and the compression region are divided by the slider, the region sizes of the blowing region and the compression region are variable, and the blowing region is placed above the compression region.

[0014] Further, when the air blowing holes do not blow air, the slider is flush with the shaping block. At this time, the size of the compression area reaches the maximum, and the size of the air blowing area is zero. When the air blowing holes blow air, the slider moves downward, the size of the air blowing area reaches the maximum, and the size of the compression area reaches the minimum.

[0015] Preferably, a method for using a stamping die based on compressed gas demolding mainly includes the following steps:

[0016] S1. Place the workpiece to be processed on the shaping block;

[0017] S2. Press down the pressing plate and the blank holder to stamp the workpiece to be processed;

[0018] S3. The pressing plate and the blank holder are reset;

[0019] S4. The first air spraying pipe and the second air spraying pipe eject air through the air blowing holes to eject the formed part.

[0020] Compared with the prior art, the present invention provides a stamping die based on compressed gas demolding, which has the following beneficial effects:

[0021] 1. For the stamping die based on compressed gas demolding, the reset spring makes the slider flush with the shaping block, and by closing the bottom of the movable groove, the baffle cannot move downward during stamping, ensuring that the contour of the air blowing holes will not be imprinted on the formed part during stamping, and ensuring the qualified rate of the formed part.

[0022] 2. For the stamping die based on compressed gas demolding, during demolding, by opening the space at the bottom of the movable groove, the external compressed gas can push the baffle downward, causing the slider to move below the air outlets of the first air spraying pipe and the second air spraying pipe, so as to ensure that the air blowing holes spray compressed gas towards the bottom of the formed part, facilitating demolding.

[0023] For the parts not involved in the stamping die based on compressed gas demolding, they are the same as or can be implemented by the prior art. The present invention adjusts the baffle in the control space, controls the lifting of the slider, and further controls the opening and closing of the air blowing holes, ensuring that the contour of the air blowing holes will not be imprinted on the formed part during stamping, and ensuring the qualified rate of the formed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural view of an overall stamping die based on compressed gas demolding proposed by the present invention Figure 1 ;

[0025] Figure 2 is a front view of a stamping die based on compressed gas demolding proposed by the present invention;

[0026] Figure 3 Structural schematic of the interior of a stamping die based on compressed gas demoulding proposed by the present invention Figure 1 ;

[0027] Figure 4 Structural schematic of the interior of a stamping die based on compressed gas demoulding proposed by the present invention Figure 2 ;

[0028] Figure 5 A stamping die based on compressed gas demoulding proposed by the present invention Figure 4 Schematic enlarged view of part A in the die;

[0029] Figure 6 Schematic structural diagram of the interior of the shaping block of a stamping die based on compressed gas demoulding proposed by the present invention;

[0030] Figure 7 A stamping die based on compressed gas demoulding proposed by the present invention Figure 6 Schematic enlarged view of part B in the die;

[0031] Figure 8 Schematic structural diagram of the interior of the shaping block when a stamping die based on compressed gas demoulding proposed by the present invention is demoulded;

[0032] Figure 9 A stamping die based on compressed gas demoulding proposed by the present invention Figure 8 Schematic enlarged view of part C in the die.

[0033] In the figure: 1. Upper die; 101. Mounting hole; 102. Force-receiving end; 103. Sleeve; 104. Retreating hole; 2. Lower die; 3. Bottom plate; 301. Machining table; 302. Limit bolt; 4. Fixed rod; 5. Shaping block; 6. Retreating rod; 7. Buffer spring; 8. Outer sleeve; 9. Adjusting rod; 10. Blowing hole; 11. Slide block; 12. Pressing plate; 13. Limit groove; 14. Blank-holding block; 15. Moving hole; 16. Pressing rod; 17. Air passage 1; 18. Side ring; 19. Air passage 2; 20. Moving groove; 21. Fixed plate; 22. Slide rod; 23. Return spring; 24. Baffle; 25. Jet pipe 1; 26. Jet pipe 2. Specific embodiments

[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.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0036] Referring to Figures 1-9 , it includes an upper die 1 and a lower die 2, and further includes: a bottom plate 3 provided on the lower die 2, a processing table 301 is provided on the bottom plate 3, a shaping block 5 is provided on the bottom plate 3, the shaping block 5 is placed at the central part of the processing table 301, a side ring 18 is provided outside the shaping block 5, and the side ring 18 is arranged on the processing table 301; a pressing plate 12 is provided below the upper die 1, an outer sleeve 8 is provided on the lower surface of the central part of the upper die 1, a blank holding block 14 is arranged inside the outer sleeve 8, a movable hole 15 is opened on the pressing plate 12, and the outer sleeve 8 slides in the movable hole 15; an air blowing hole 10 is opened at the central part of the shaping block 5, a movable groove 20 is opened below the air blowing hole 10, a fixing plate 21 is fixedly connected inside the movable groove 20, a hole is opened at the center of the fixing plate 21, a sliding rod 22 is arranged inside the movable groove 20, the sliding rod 22 passes through the hole at the center of the fixing plate 21, a disc-shaped slider 11 with a diameter consistent with that of the air blowing hole 10 is arranged at the top end of the sliding rod 22, a return spring 23 is arranged between the slider 11 and the fixing plate 21, the return spring 23 is sleeved on the sliding rod 22, a disc-shaped baffle 24 with a diameter consistent with that of the cylindrical movable groove 20 is arranged at the bottom end of the sliding rod 22, and the baffle 24 is placed below the fixing plate 21; the movable groove 20 is divided into two spaces by the fixing plate 21, the space above the fixing plate 21 is the release space, and the space below the fixing plate 21 is the control space. The release space and the control space are connected and communicated through an air injection pipe one 25 and an air injection pipe two 26, and the control space is connected to an external air source through an air passage two 19.

[0037] In the present invention, after the workpiece to be processed is placed on the shaping block 5, the pressing plate 12 and the blank holding block 14 are pressed down to perform stamping on the workpiece to be processed. The side ring 18 is used to place the workpiece to be processed to prevent it from slipping off and limit the workpiece to be processed. After stamping is completed, the pressing plate 12 and the blank holding block 14 are reset. At this time, compressed gas enters the control space through the second air passage 19. Since in the initial state, the slider 11 is flush with the shaping block 5, the slider 11 blocks the air outlets of the first air jet pipe 25 and the second air jet pipe 26, and the compressed gas entering the control space cannot be discharged through the first air jet pipe 25 and the second air jet pipe 26. The high-pressure compressed gas pushes the baffle 24 downward in the control space, thereby driving the slider 11 to move downward until the slider 11 moves downward to no longer block the air outlets of the first air jet pipe 25 and the second air jet pipe 26. At this time, the compressed gas in the control space is discharged to the air blowing holes 10 through the first air jet pipe 25 and the second air jet pipe 26, and then sprayed on the bottom of the formed part, which can help it to be quickly demolded. During the downward movement of the slider 11, the slider 11 compresses the return spring 23. When the second air passage 19 stops supplying gas, the return spring 23 controls the slider 11 to reset.

[0038] In one embodiment, for the existing stamping die that uses compressed gas for demolding, due to the exhaust holes on the die that facilitate demolding, during stamping, it may cause the outline, grooves, and protrusions of the exhaust holes to be imprinted on the formed part. Especially when the die is not very flat, this problem often occurs, which is not conducive to the yield rate.

[0039] To solve the above problems, in the present invention, a slider 11 is provided on the air blowing holes 10. During stamping, under the action of the return spring 23, the slider 11 is naturally flush with the shaping block 5, thus blocking the notch of the air blowing holes 10, and further preventing the outline, grooves, and protrusions of the air blowing holes 10 from being imprinted on the formed part, thereby ensuring the processing yield rate. And during stamping, the plate below the baffle 24 is closed, so even if an external force is applied to the slider 11, the slider 11 will not move downward.

[0040] After processing is completed and demolding is required, external compressed gas enters the control space through the second air passage 19. The compressed gas entering the control space cannot be discharged through the first air jet pipe 25 and the second air jet pipe 26. The high-pressure compressed gas pushes the baffle 24 downward in the control space, thereby driving the slider 11 to move downward until the slider 11 moves downward to no longer block the air outlets of the first air jet pipe 25 and the second air jet pipe 26. At this time, the compressed gas in the control space is discharged to the air blowing holes 10 through the first air jet pipe 25 and the second air jet pipe 26, and then sprayed on the bottom of the formed part, which can help it to be quickly demolded. And at this time, the plate below the baffle 24 is open.

[0041] For the plate below the baffle 24, please refer to Figure 7Among them, the plate at the notch below the movable slot 20, the opening and closing of which can be controlled by an electric valve, is the prior art and will not be elaborated here.

[0042] Referring to Figures 1-9 , it includes an upper die 1 and a lower die 2, and also includes: a bottom plate 3 provided on the lower die 2, a processing table 301 provided on the bottom plate 3, a shaping block 5 provided on the bottom plate 3, the shaping block 5 is placed at the central part of the processing table 301, a side ring 18 is provided outside the shaping block 5, and the side ring 18 is arranged on the processing table 301; a pressing plate 12 is provided below the upper die 1, an outer sleeve 8 is provided on the lower surface of the central part of the upper die 1, a pressure block 14 is arranged inside the outer sleeve 8, a movable hole 15 is opened on the pressing plate 12, and the outer sleeve 8 slides in the movable hole 15; a blowing hole 10 is opened at the central part of the shaping block 5, an activity slot 20 is opened below the blowing hole 10, a fixing plate 21 is fixedly connected inside the activity slot 20, a hole is opened at the center of the fixing plate 21, a sliding rod 22 is arranged in the activity slot 20, the sliding rod 22 passes through the hole at the center of the fixing plate 21, a disc-shaped slider 11 with a diameter consistent with that of the blowing hole 10 is arranged at the top end of the sliding rod 22, a return spring 23 is arranged between the slider 11 and the fixing plate 21, the return spring 23 is sleeved on the sliding rod 22, and a disc-shaped baffle 24 with a diameter consistent with that of the cylindrical activity slot 20 is arranged at the bottom end of the sliding rod 22, and the baffle 24 is placed below the fixing plate 21; the activity slot 20 is divided into two spaces by the fixing plate 21, the space above the fixing plate 21 is the release space, and the space below the fixing plate 21 is the control space, and the release space and the control space are connected and communicated through an air injection pipe one 25 and an air injection pipe two 26, and the control space is connected to an external air source through an air passage two 19.

[0043] Referring to Figures 1-9 , a force receiving end 102 is provided on the upper die 1, a pressure rod 16 is provided below the force receiving end 102, and the pressure rod 16 is fixedly connected to the pressure block 14; an installation hole 101 and a retraction hole 104 are respectively opened on the upper die 1, a sleeve 103 is installed in the installation hole 101, a fixing rod 4 is fixedly connected to the bottom plate 3, and the upper end of the fixing rod 4 slides in the sleeve 103; a retraction rod 6 is inserted in the retraction hole 104, the bottom of the retraction rod 6 is threadedly connected to the pressing plate 12, and a buffer spring 7 is arranged between the pressing plate 12 and the upper die 1, and the buffer spring 7 is sleeved on the retraction rod 6.

[0044] In the present invention, the force receiving end 102 itself can be a power source or an external power source for controlling the pressure rod 16 to press the pressure block 14, and the power source is preferably a cylinder.

[0045] In one embodiment, the sleeve 103 and the fixing rod 4 cooperate to guide the pressure block 14 to punch the workpiece to be processed, ensuring that the pressure block 14 presses down vertically without deviation;

[0046] The buffer spring 7 is used to buffer the punching force of the blank holder 14, ensuring the forming qualification rate of the workpiece to be processed. At the same time, during stamping, the pressing plate 12 can be lifted, compressing the buffer spring 7 simultaneously. In this way, after the processing is completed, when the blank holder 14 resets, the pressing plate 12 resets under the push of the buffer spring 7, and the reset pressing plate 12 will push the formed part, helping the formed part to break away when it may get stuck on the blank holder 14.

[0047] Referring to Figures 1-9 , a limiting groove 13 is provided inside the outer sleeve 8, and the blank holder 14 is installed and fixed in the limiting groove 13; a limiting bolt 302 is provided on the processing table 301; a regulating rod 9 is provided below the edge ring 18, the regulating rod 9 penetrates through the lower die 2 and the bottom plate 3, and an air passage one 17 is provided inside the lower die 2 and the bottom plate 3, and the air passage one 17 is communicated with the air passage two 19.

[0048] In the present invention, the blank holder 14 can be fixed through the limiting groove 13, and the shaping block 5 and the edge ring 18 can be limited and fixed by the limiting bolt 302;

[0049] The height of the edge ring 18 can be adjusted through the regulating rod 9, thereby adjusting the shape of the formed part to a certain extent. At the same time, the edge ring 18 can prevent the workpiece to be processed from running off and shifting during stamping. The air passage one 17 is connected to an external compressed air source and discharges the compressed gas into the air passage two 19.

[0050] Referring to Figures 1-9 , the release space above the fixing plate 21 can be subdivided into two regions, namely the air blowing region and the compression region, which are divided by the slider 11. The region sizes of the air blowing region and the compression region are variable, and the air blowing region is placed above the compression region; when the air blowing hole 10 does not blow air, the slider 11 is flush with the shaping block 5, and at this time, the region size of the compression region reaches the maximum, and the region size of the air blowing region is zero. When the air blowing hole 10 blows air, the slider 11 moves downward, the region size of the air blowing region reaches the maximum, and the region size of the compression region reaches the minimum.

[0051] In the present invention, during stamping, under the action of the reset spring 23, the slider 11 naturally aligns with the shaping block 5, and at this time, the air blowing region is zero;

[0052] After processing is completed, demoulding is required. External compressed gas sequentially enters the control space through air duct 17 and air duct 19. Since the slider 11 is flush with the shaping block 5, the slider 11 blocks the air outlets of the first air jet pipe 25 and the second air jet pipe 26. The compressed gas entering the control space cannot be discharged through the first air jet pipe 25 and the second air jet pipe 26. The high-pressure compressed gas pushes the baffle 24 downward in the control space, thereby driving the slider 11 downward until the slider 11 moves downward to no longer block the air outlets of the first air jet pipe 25 and the second air jet pipe 26. At this time, the high-pressure compressed gas in the control space is released, the baffle 24 no longer moves downward, and the released compressed gas helps the formed part to be demoulded through the air blowing holes 10.

[0053] Further, multiple first air jet pipes 25 and second air jet pipes 26 can be provided.

[0054] Refer to Figures 1-9 , in the present invention, a method for using a stamping die based on compressed gas demoulding mainly includes the following steps:

[0055] S1. Place the workpiece to be processed on the shaping block 5;

[0056] S2. Press down the pressing plate 12 and the blank holding block 14 to stamp the workpiece to be processed;

[0057] S3. Reset the pressing plate 12 and the blank holding block 14;

[0058] S4. The first air jet pipe 25 and the second air jet pipe 26 jet air through the air blowing holes 10 to eject the formed part.

[0059] In the present invention, by adjusting the baffle 24 in the control space, the lifting of the slider 11 is controlled, and thus the opening and closing of the air blowing holes 10 are controlled, ensuring that the outline of the air blowing holes 10 will not be imprinted on the formed part during stamping, and ensuring the qualified rate of the formed part.

[0060] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A stamping die based on compressed gas demoulding, comprising an upper die (1) and a lower die (2), characterized in that, further comprising: a bottom plate (3) arranged on the lower die (2), a processing table (301) is provided on the bottom plate (3), a shaping block (5) is provided on the bottom plate (3), the shaping block (5) is placed at the central part of the processing table (301), a side ring (18) is arranged outside the shaping block (5), and the side ring (18) is arranged on the processing table (301); a pressing plate (12) is arranged below the upper die (1), an outer sleeve (8) is provided on the lower surface of the central part of the upper die (1), a blank holding block (14) is arranged inside the outer sleeve (8), a movable hole (15) is formed on the pressing plate (12), and the outer sleeve (8) slides in the movable hole (15); a blowing hole (10) is formed at the central part of the shaping block (5), a movable groove (20) is formed below the blowing hole (10), a fixing plate (21) is fixedly connected inside the movable groove (20), a hole is formed at the center of the fixing plate (21), a sliding rod (22) is arranged inside the movable groove (20), the sliding rod (22) passes through the hole at the center of the fixing plate (21), a disc-shaped slider (11) with a diameter consistent with that of the blowing hole (10) is arranged at the top end of the sliding rod (22), a return spring (23) is arranged between the slider (11) and the fixing plate (21), the return spring (23) is sleeved on the sliding rod (22), a disc-shaped baffle (24) with a diameter consistent with that of the cylindrical movable groove (20) is arranged at the bottom end of the sliding rod (22), and the baffle (24) is placed below the fixing plate (21); the movable groove (20) is divided into two spaces by the fixing plate (21), the space above the fixing plate (21) is a release space, and the space below the fixing plate (21) is a control space. The release space and the control space are communicated through an air injection pipe one (25) and an air injection pipe two (26), and the control space is communicated with an external air source through an air passage two (19); a force receiving end (102) is arranged on the upper die (1), a pressure rod (16) is arranged below the force receiving end (102), and the pressure rod (16) is fixedly connected with the blank holding block (14); installation holes (101) and retraction holes (104) are respectively formed on the upper die (1), a sleeve (103) is installed inside the installation hole (101), a fixing rod (4) is fixedly connected to the bottom plate (3), and the upper end of the fixing rod (4) slides inside the sleeve (103).

2. The stamping die based on compressed gas demoulding according to claim 1, characterized in that, a retraction rod (6) is inserted into the retraction hole (104), the bottom of the retraction rod (6) is threadedly connected to the pressing plate (12), a buffer spring (7) is arranged between the pressing plate (12) and the upper die (1), and the buffer spring (7) is sleeved on the retraction rod (6).

3. The stamping die based on compressed gas demoulding according to claim 1, characterized in that, A limiting groove (13) is arranged inside the outer sleeve (8), and the pressure block (14) is fixedly installed in the limiting groove (13).

4. A stamping die based on compressed gas demolding according to claim 1, characterized in that Limiting bolts (302) are arranged on the processing table (301).

5. A stamping die based on compressed gas demolding according to claim 1, characterized in that An adjusting rod (9) is arranged below the edge ring (18), the adjusting rod (9) penetrates through the lower die (2) and the bottom plate (3), and an air passage I (17) is arranged in the lower die (2) and the bottom plate (3), and the air passage I (17) is communicated with an air passage II (19).

6. A stamping die based on compressed gas demolding according to claim 1, characterized in that The release space above the fixing plate (21) can be subdivided into two areas, namely a blowing area and a compression area. The blowing area and the compression area are divided by a slider (11). The area sizes of the blowing area and the compression area are variable, and the blowing area is located above the compression area.

7. A stamping die based on compressed gas demolding according to claim 6, characterized in that When the air blowing hole (10) does not blow air, the slider (11) is flush with the shaping block (5). At this time, the area size of the compression area reaches the maximum, and the area size of the blowing area is zero. When the air blowing hole (10) blows air, the slider (11) moves down, the area size of the blowing area reaches the maximum, and the area size of the compression area reaches the minimum.

8. A method for using a stamping die based on compressed gas demolding, including a stamping die based on compressed gas demolding according to claim 1, mainly including the following steps: S1. Place the workpiece to be processed on the shaping block (5); S2. Press down the pressing plate (12) and the pressure block (14) to stamp the workpiece to be processed; S3. The pressing plate (12) and the pressure block (14) are reset; S4. The air spraying pipes I (25) and II (26) eject air through the air blowing holes (10) to eject the formed part.

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