Press molding mold and product molding method

Abstract

A stamping die includes an upper die base assembly, an upper stripper assembly, a lower die base assembly, and a lower stripper assembly. It further includes: a forging punch connected to the upper die base assembly and movably placed within the upper stripper assembly; an upper abutting assembly that abuts against the upper die base assembly in the open state, with the upper die base assembly and the upper stripper assembly spaced apart; a half-shear punch connected to the lower die base assembly and movably placed within the lower stripper assembly; and a lower abutting assembly that, in the open state, abuts against the lower stripper assembly upwards, spaced apart from the lower die base assembly. The upper abutting assembly is used to move the lower stripper assembly closer to the lower die base assembly, causing the half-shear punch to extend out of the lower stripper assembly and perform half-shear forming on the product to be processed. When the lower stripper assembly abuts against the lower die base assembly, the upper die base assembly abuts against the upper stripper assembly, driving the forging punch towards the product to be formed, allowing the forging punch to perform forging forming to create a protrusion on the product. This application also provides a product forming method.

Description

Technical Field

[0001] This invention relates to the field of product forming technology, and in particular to stamping molds and product forming methods. Background Technology

[0002] When molding products with protrusions, materials taller than the protrusions are generally selected and machined using CNC cutting. Although CNC cutting offers high precision, it results in low material utilization and wasted costs because the material height must exceed the protrusion's height. Furthermore, CNC cutting requires multiple cuts, leading to lower production efficiency.

[0003] Stamping can make full use of existing materials and form protrusions in one stamping process. Therefore, stamping is also the main processing method for forming products with protrusions. However, if the stamping force is too large during stamping, it will have an adverse effect on the stamping die and the product. Summary of the Invention

[0004] In view of this, it is necessary to provide a stamping die and a product forming method to reduce the impact of stamping force on the stamping die and the product when forming protrusions on the product.

[0005] A stamping die includes an upper die base assembly, an upper stripper assembly, a lower die base assembly, and a lower stripper assembly, and further includes:

[0006] A forging punch is connected to the upper die base assembly and movably placed in the upper stripper assembly;

[0007] The upper abutment component is connected to the upper mold base assembly and the upper stripper assembly. In the unclosed state, the upper abutment component provides a resisting force toward the upper mold base assembly to abut against the upper mold base assembly, and the upper mold base assembly and the upper stripper assembly are spaced apart.

[0008] A half-shear punch is connected to the lower die base assembly and movably placed in the lower stripper assembly;

[0009] The lower abutment component is connected to the lower mold base component and the lower stripper component. In the unclosed state, the lower abutment component abuts the lower stripper component upward so that the lower stripper component and the lower mold base component are spaced apart. The abutting force of the lower abutment component against the lower stripper component is less than the abutting force provided by the upper abutment component towards the upper mold base component.

[0010] The upper support component is used to overcome the supporting force of the lower support component on the lower stripping component when the upper stripping component moves to the product to be processed placed on the lower stripping component, so that the lower stripping component moves closer to the lower mold base component so that the half-shear punch extends out of the lower stripping component to perform half-shear forming on the product to be processed;

[0011] The upper die holder assembly is used to move closer to the upper stripper assembly and abut against the lower stripper assembly when the lower stripper assembly moves to abut against the lower die holder assembly, so as to drive the forging punch toward the product to be formed, so that the forging punch forges and forms a protrusion on the product to be processed after half-shearing.

[0012] Furthermore, the upper mold base assembly forms a first through hole, and the upper abutment assembly includes a first abutment force providing member, an upper mold top plate connected to the first abutment force providing member and placed above the upper mold base assembly, and a force transmission rod fixed between the upper mold top plate and the upper stripping assembly, wherein the force transmission rod is movably placed in the first through hole.

[0013] Furthermore, the first supporting force providing component includes a first cylinder having a first spring and moving synchronously with the upper mold base assembly. When the upper supporting assembly abuts against the upper mold base assembly, the first spring is in a natural state. When the upper mold base assembly moves close to the upper stripper assembly, the first spring in the first cylinder is compressed. When the mold is opened, the first spring resets, causing the upper mold top plate to abut against the upper mold base assembly again and causing the upper mold base assembly and the upper stripper assembly to return to their original positions with a distance between them.

[0014] Furthermore, there are multiple first through holes, which are symmetrically arranged around the forging punch.

[0015] Furthermore, the upper stripping assembly forms a first through hole to accommodate the forging punch. The diameter of the end of the forging punch facing the lower stripping assembly is smaller than the diameter of the first through hole, so that a gap is formed between the forging punch and the first through hole. The gap is used to accommodate the protrusion formed during forging.

[0016] Furthermore, the stamping die also includes an ejector assembly for ejecting the protrusion out of the gap during die opening to allow the molded product to be ejected.

[0017] Furthermore, the ejection assembly includes an inner support and an elastic element. The upper ejector assembly also forms a receiving hole surrounding the first through hole. The inner support is movably placed in the receiving hole. The elastic element abuts between the inner support and the upper ejector assembly. The end of the inner support away from the upper mold base has an ejection portion protruding. The ejection portion is placed in the gap and is used to push the protrusion out under the abutment of the elastic element when the mold is opened, so that the molded product can be ejected.

[0018] Furthermore, the lower mold base assembly forms a second through hole, and the lower abutment assembly includes a second abutment force providing member, a lower mold top plate connected to the second abutment force providing member and placed below the lower mold base assembly, and a lower force transmission push rod fixed between the lower mold top plate and the lower stripping assembly, wherein the lower force transmission push rod is movably placed in the second through hole.

[0019] Furthermore, the second supporting force providing component includes a second cylinder with a second spring. When the lower stripping assembly abuts against the lower mold base assembly, the second spring in the second cylinder is in a compressed state. When the mold is opened, the second spring resets, causing the lower force transmission push rod to push the lower stripping assembly to its original position, which is spaced apart from the lower mold base assembly.

[0020] A product forming method for forming a product includes: placing the product to be formed on the lower stripping component of the stamping forming die, performing a semi-shear forming of the product to be formed by the stamping forming die, and then performing forging forming to form a product with protrusions.

[0021] In the above-mentioned stamping die and product forming method, during the product forming process, the upper stripper assembly can press down the lower stripper assembly to cause the half-shear punch to extend out of the lower stripper assembly and perform half-shear forming on the product to be processed. Then, by moving the upper die base assembly, the forging punch can forge and form the half-shear formed product to be processed to form a protrusion. Compared with a single stamping process, the above-mentioned stamping process includes two steps: half-shear forming and forging forming. In this way, the impact force during the die closing process can be reduced, and correspondingly, the impact on the stamping die and product is reduced. Attached Figure Description

[0022] Figure 1 An exploded view of a stamping die provided in this application.

[0023] Figure 2 for Figure 1 A cross-sectional view of the stamping die when the material is placed.

[0024] Figure 3 for Figure 1 A cross-sectional view of a stamping die during product forming.

[0025] Figure 4 In one embodiment, by Figure 1 A schematic diagram of the product before and after forming by the stamping die.

[0026] Figure 5 for Figure 2 A schematic diagram of a stamping die when it is not closed.

[0027] Figure 6 for Figure 5 A schematic diagram of the stamping die pressing process.

[0028] Figure 7 for Figure 5 A schematic diagram of a stamping die being used for half-shear forming.

[0029] Figure 8 for Figure 5A schematic diagram of the forging process using a stamping die.

[0030] Explanation of main component symbols

[0031]

[0032] Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms "a," "the," and "the" used in the embodiments of this invention are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items. Furthermore, the terms "first," "second," etc., in the specification and the accompanying drawings are used to distinguish different objects and not to describe a particular order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0035] Please see Figures 1 to 3 This application provides a stamping die 100 for forming a product with protrusions. In one embodiment, the formed product is as follows: Figure 3 As shown in the product 200, the product 200 includes a protrusion 210 and is formed from material 300 by stamping die 100.

[0036] The stamping die 100 includes an upper die base assembly 1, an upper support assembly 2, an upper stripper assembly 3, a forging punch 4, a lower die base assembly 5, a lower stripper assembly 7, a lower support assembly 6, and a half-shear punch 8. The upper die base assembly 1 is fixed to the machine base and moves with the machine base to achieve die closing and opening. The upper stripper assembly 3 is located below the upper die base assembly 1. The forging punch 4 is connected to the upper die base assembly 1 and movably placed within the upper stripper assembly 3. The upper support assembly 2 is connected to both the upper die base assembly 1 and the upper stripper assembly 3. In the open die state, the upper support assembly 2 provides a supporting force towards the upper die base assembly 1 to support it, and the upper die base assembly 1 and the upper stripper assembly 3 are spaced apart. The lower stripper assembly 7 carries the product to be formed. The lower die base assembly 5 is fixedly located below the lower stripper assembly 7. The half-shear punch 8 is connected to the lower die base assembly 5 and movably placed within the lower stripper assembly 7. The lower support component 6 is connected to the lower mold base component 5 and the lower stripper component 7. In the unclosed state, the lower support component 6 pushes the lower stripper component 7 upward so that the lower stripper component 7 and the lower mold base component 5 are spaced apart. The supporting force of the lower support component 6 pushing the lower stripper component 7 upward is less than the supporting force provided by the upper support component 2 towards the upper mold base component 1.

[0037] During the mold closing process driven by the machine tool, the upper mold base assembly 1 moves to the product to be processed (such as...) placed on the lower mold stripping assembly 7. Figure 4 When the material 300 is applied to the lower ejector assembly 7, the upper supporting component 2 overcomes the supporting force of the lower supporting component 6 on the lower ejector assembly 7, causing the lower ejector assembly 7 to move closer to the lower die base assembly 5 so that the half-shear punch 8 extends out of the lower ejector assembly 7 to perform half-shear forming on the product to be processed, forming as shown in the figure. Figure 4 The groove 220 on the product 200; when the lower stripper assembly 7 moves to abut against the lower die base assembly 5, the upper die base assembly 1 moves close to the upper stripper assembly 3 to abut against the upper stripper assembly 3 to drive the forging punch 4 toward the product to be formed, so that the forging punch 4 forges and forms the product to be processed after half-shearing to form such as Figure 4 The protrusion 210 on product 200.

[0038] Specifically, the upper die base assembly 1 includes an upper die base 11 and an upper pad 12 and an upper clamping plate 13 sequentially placed below the upper die base 11. A first gap 15 is formed between the upper clamping plate 13 and the upper stripper assembly 3. The upper die base 11, the upper pad 12, and the upper clamping plate 13 are fixedly connected and form two sets of first through holes 14. The two sets of first through holes 14 are symmetrically placed on both sides of the forging punch 4. The upper die base 11, the upper pad 12, and the upper clamping plate 13 can be fixed by screws. The upper support assembly 2 includes a first support force providing member 21, an upper die top plate 22 connected to the first support force providing member 21 and placed above the upper die base assembly 1, and a force transmission push rod 23 fixed between the upper die top plate 22 and the upper stripper assembly 3. The two force transmission push rods 23 are movably placed in the two first through holes 14, so that the upper die base assembly 1 can move along the force transmission push rods 23 under the drive of the machine. It is understood that in other embodiments, the number of first through holes 14 may be three, four or more, and multiple first through holes 14 are symmetrically placed around the forging punch 4. Correspondingly, the number of force-carrying push rods 23 is also multiple, and multiple force-carrying push rods 23 are placed in multiple first through holes 14.

[0039] In one embodiment, the first supporting force providing member 21 includes a first cylinder having a first spring and moving synchronously with the upper mold base assembly 1. The first cylinder and the upper mold base assembly 1 can be connected by an intermediate component, thereby enabling the first cylinder and the upper mold base assembly 1 to move synchronously. When the upper supporting assembly 2 abuts against the upper mold base assembly 1, the first spring is in its natural state. The air pressure of the first cylinder causes the upper supporting assembly 2 to abut against the upper mold base assembly 1. When the upper mold base assembly 1 moves closer to the upper stripper assembly 3, the first spring in the first cylinder is compressed. During mold opening, the first spring returns to its original position, causing the upper mold top plate 22 to abut against the upper mold base assembly 1 again and restoring the upper mold base assembly 1 and the upper stripper assembly 3 to their original, spaced-apart positions.

[0040] The upper stripper assembly 3 includes an upper stripper back plate 31 facing the upper die base assembly 1 and an upper stripper plate 32 fixedly connected to the side of the upper stripper back plate 31 away from the upper die base assembly 1. The upper stripper back plate 31 and the upper stripper plate 32 can be fixed by screws. The upper stripper back plate 31 and the upper stripper plate 32 form a first through hole 33. One end of the forging punch 4 is fixed to the upper pad plate 12, and the forging punch 4 is movably placed in the first through hole 33. The diameter of the end of the forging punch 4 facing the lower stripper assembly 7 is smaller than the diameter of the first through hole 33, so that a gap 34 is formed between the forging punch 4 and the first through hole 33. The gap 34 is used to accommodate the protrusion formed during forging.

[0041] The stamping die 100 also includes an ejector assembly 9, which is used to eject the protrusion from the gap 34 during die opening to eject the molded product. In one embodiment, the ejector assembly 9 includes an inner support 91 and an elastic member 92. The upper stripper assembly 3 also forms a receiving hole 35 surrounding the first through hole 33, the inner support 91 is movably placed in the receiving hole 35, and the elastic member 92 is held between the inner support 91 and the upper stripper assembly 3. An ejector portion 93 protrudes from one end of the inner support 91 away from the upper die holder 11, and the ejector portion 93 is placed in the gap 34. The ejector portion 93 is used to overcome the elastic force of the elastic member 92 and move away from the lower stripper assembly 7 under the upward extrusion force of the material during the forging process to form a protrusion in the gap 34, and is also used to eject the protrusion under the holding of the elastic member 92 during die opening to eject the molded product. In one embodiment, the inner support 91 forms an annular hole 94, and the elastic member 92 is placed in the annular hole 94.

[0042] The lower die base assembly 5 includes a lower die base 51 and a lower pad 52 and a lower clamping plate 53 sequentially placed above the lower die base 51. A second gap 55 is formed between the lower clamping plate 53 and the lower stripper assembly 7. The lower die base 51, the lower pad 52, and the lower clamping plate 53 are fixedly connected and form two sets of second through holes 54. The two sets of second through holes 54 are symmetrically placed on both sides of the half-shear punch 8. The lower die base 51, the lower pad 52, and the lower clamping plate 53 can be fixed by screws. The lower abutment assembly 6 includes a second abutment force providing member 61, a lower die top plate 62 connected to the second abutment force providing member 61 and placed below the lower die base assembly 5, and a lower force transmission rod 63 fixed between the lower die top plate 62 and the lower stripper assembly 7. The two lower force transmission rods 63 are movably placed in the two second through holes 54, so that when the lower stripper assembly 7 is pressed down and moves toward the lower die base assembly 5, the lower force transmission rods 63 can move downward along the second through holes 54. It is understood that in other embodiments, the number of second through holes 54 may be three, four or more, and multiple second through holes 54 are symmetrically placed around the half-shear punch 8. Correspondingly, the number of lower force transmission push rods 63 is also multiple, and multiple lower force transmission push rods 63 are placed in multiple second through holes 54.

[0043] In one embodiment, the second supporting force providing member 61 includes a second cylinder (not shown) with a second spring. When the lower stripper assembly 7 abuts against the lower mold base assembly 5, the second spring in the second cylinder is in a compressed state. When the mold is opened, the second spring resets, causing the lower force transmission push rod 63 to push the lower stripper assembly 7 to its original position spaced apart from the lower mold base assembly 5. The air pressure provided by the second cylinder when the lower stripper assembly 7 and the lower mold base assembly 5 are spaced apart is less than the air pressure provided by the first cylinder when the upper stripper assembly 3 and the upper mold base assembly 1 are spaced apart. Therefore, when the upper stripper assembly 3 and the product to be molded on the lower stripper assembly 7 abut against each other, the upper stripper assembly 3 presses down on the lower stripper assembly 7 to move downward.

[0044] The lower stripper assembly 7 includes a lower stripper back plate 71 facing the lower die base assembly 5 and a lower stripper plate 72 fixedly connected to the side of the lower stripper back plate 71 away from the lower die base assembly 5. The lower stripper back plate 71 and the lower stripper plate 72 can be fixed by screws. The lower stripper back plate 71 and the lower stripper plate 72 form a second through hole 73 aligned with the first through hole 33. One end of the half-shear punch 8 is fixed to the lower pad plate 52, and the half-shear punch 8 is movably placed in the second through hole 73. The half-shear punch 8 extends out of the lower stripper assembly 7 when the lower stripper assembly 7 moves close to the lower die base assembly 5, thereby stripping the lower stripper back plate 71. Figure 4 The material 300 is extruded upward to form the groove 220 on the product 200.

[0045] During the molding process of material 300, before the mold is closed, such as Figure 5 There is a first gap 15 between the upper die holder assembly 1 and the upper stripper assembly 3. The end of the forging punch 4 is retracted within the upper stripper assembly 3. There is also a second gap 55 between the lower stripper assembly 7 and the lower die holder assembly 5. The end of the half-shear punch 8 is retracted within the lower stripper assembly 7. Before mold closing, the material 300 for forming the product is placed on the lower stripper assembly 7. Then, the mold closing operation is performed. The upper die holder assembly 1 moves towards the lower stripper assembly 7 under the drive of the machine until the upper stripper assembly 3 presses against the material 300 of the lower stripper assembly 7 to press and extend the material 300. The pressing and extending is shown in the figure. Figure 6 As shown. Because the downward force provided by the upper supporting component 2 is greater than the upward supporting force of the lower supporting component 6, when the upper unloading component 3 is pressing the material, as... Figure 7 The lower stripper assembly 7 will move downward together with the second abutment assembly, thereby moving the lower stripper assembly 7 closer to the lower die base assembly 5, causing the half-shear punch 8 fixed on the lower die base assembly 5 to extend out of the second through hole 73, thereby forming the material 300 as shown in the figure. Figure 4 The groove 220 in the middle. For example... Figure 8 When the lower stripper assembly 7 moves close to the lower die base assembly 5 and abuts against it, the lower stripper assembly 7 can no longer move downwards. At this time, the upper die base assembly 1 moves downwards along the force transmission push rod 23. At this time, the forging punch 4, which is fixedly connected to the upper die base assembly 1, also moves downwards to punch the part of the material 300 corresponding to the groove, causing the material 300 to be extruded to form a protrusion located in the gap 34, thereby forming a shape like... Figure 4 Product 200.

[0046] After product 200 is formed, during mold opening, ejector component 9 ejects the protrusion downwards, causing product 200 to fall onto lower stripper component 7. Simultaneously, since the pressure on lower stripper component 7 has been removed, it moves upwards under the upward supporting force provided by lower support component 6, returning to its position spaced apart from lower mold base component 5. Since upper stripper component 3 is no longer blocked by lower stripper component 7, it moves downwards under the downward supporting force provided by upper support component 2, returning to its position spaced apart from upper mold base component 1. Thus, one product forming cycle is completed.

[0047] This application also provides a product forming method using the above-mentioned stamping die 100. When forming a product, the product to be formed is placed on the lower stripping component 7 of the above-mentioned stamping die 100, and then the product to be formed is partially sheared by the stamping die 100 and then forged to form a product with protrusions.

[0048] In the product forming process described above, the upper stripper assembly 3 can press down the lower stripper assembly 7 to cause the half-shear punch 8 to extend out of the lower stripper assembly 7 to perform half-shear forming of the product to be processed. Then, the upper die base assembly 1 can be moved to cause the forging punch 4 to forge and form the half-shear formed product to be processed to form a protrusion. Compared with a single stamping process, the above stamping process includes two steps: half-shear forming and forging forming. In this way, the impact force during the die closing process can be reduced, and correspondingly, the impact on the stamping die 100 and the product can be reduced.

[0049] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of the present invention fall within the scope disclosed by the present invention.

Claims

1. A stamping die, comprising an upper die base assembly, an upper stripper assembly, a lower die base assembly, and a lower stripper assembly, characterized in that, Also includes: A forging punch is connected to the upper die base assembly and movably placed in the upper stripper assembly; The upper abutment component is connected to the upper mold base assembly and the upper stripper assembly. In the unclosed state, the upper abutment component provides a resisting force toward the upper mold base assembly to abut against the upper mold base assembly, and the upper mold base assembly and the upper stripper assembly are spaced apart. A half-shear punch is connected to the lower die base assembly and movably placed in the lower stripper assembly; The lower abutment component is connected to the lower mold base component and the lower stripper component. In the unclosed state, the lower abutment component abuts the lower stripper component upward so that the lower stripper component and the lower mold base component are spaced apart. The abutting force of the lower abutment component against the lower stripper component is less than the abutting force provided by the upper abutment component towards the upper mold base component. The upper support component is used to overcome the supporting force of the lower support component on the lower stripping component when the upper stripping component moves to the product to be processed placed on the lower stripping component, so that the lower stripping component moves closer to the lower mold base component so that the half-shear punch extends out of the lower stripping component to perform half-shear forming on the product to be processed; The upper die base assembly is used to move closer to the upper stripper assembly and abut against the lower stripper assembly when the lower stripper assembly moves to abut against the lower die base assembly, thereby driving the forging punch toward the product to be formed, so that the forging punch forges and forms the protrusion of the product after the semi-shear forming; the upper die base assembly forms a first through hole, and the upper abutting assembly includes a first abutting force providing member, an upper die top plate connected to the first abutting force providing member and placed above the upper die base assembly, and a force transmitting rod fixed between the upper die top plate and the upper stripper assembly, the force transmitting rod being movably placed in the first through hole; the first abutting force providing member includes a first cylinder having a first spring and moving synchronously with the upper die base assembly; The lower mold base assembly forms a second through hole, and the lower abutment assembly includes a second abutment force providing member, a lower mold top plate connected to the second abutment force providing member and placed below the lower mold base assembly, and a lower force transmitting push rod fixed between the lower mold top plate and the lower stripping assembly. The lower force transmitting push rod is movably placed in the second through hole; the second abutment force providing member includes a second cylinder with a second spring. The air pressure provided by the second cylinder when the lower stripping assembly and the lower mold base assembly are spaced apart is less than the air pressure provided by the first cylinder when the upper stripping assembly and the upper mold base assembly are spaced apart.

2. The stamping die as described in claim 1, characterized in that, When the upper supporting component abuts against the upper mold base component, the first spring is in its natural state. When the upper mold base component moves close to the upper stripper component, the first spring in the first cylinder is compressed. When the mold is opened, the first spring resets, causing the upper mold top plate to abut against the upper mold base component again and causing the upper mold base component and the upper stripper component to return to their original positions with a gap.

3. The stamping die as described in claim 1, characterized in that, There are multiple first through holes, which are symmetrically arranged around the forging punch.

4. The stamping die as described in claim 1, characterized in that, The upper stripping assembly forms a first through hole to accommodate the forging punch. The diameter of the end of the forging punch facing the lower stripping assembly is smaller than the diameter of the first through hole, so that a gap is formed between the forging punch and the first through hole. The gap is used to accommodate the protrusion formed during forging.

5. The stamping die as described in claim 4, characterized in that, It also includes an ejector assembly for ejecting the protrusion out of the gap during mold opening to eject the molded product.

6. The stamping die as described in claim 5, characterized in that, The ejection assembly includes an inner support and an elastic element. The upper ejector assembly also forms a receiving hole surrounding the first through hole. The inner support is movably placed in the receiving hole. The elastic element abuts between the inner support and the upper ejector assembly. The end of the inner support away from the upper mold base has an ejection portion protruding. The ejection portion is placed in the gap and is used to push the protrusion out under the abutment of the elastic element when the mold is opened, so that the molded product can be ejected.

7. The stamping die as described in claim 1, characterized in that, When the lower stripper assembly abuts against the lower mold base assembly, the second spring in the second cylinder is in a compressed state. When the mold is opened, the second spring resets, causing the lower force transmission push rod to push the lower stripper assembly to its original position, which is spaced apart from the lower mold base assembly.

8. A product molding method for molding products, characterized in that, include: The product to be formed is placed on the lower stripping assembly of the stamping die as described in any one of claims 1 to 7, and the product to be formed is partially sheared and then forged by the stamping die as described in any one of claims 1 to 7 to form a product with protrusions.

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