Forging and pressing die for forging and pressing cavity copper piece

Abstract

The utility model relates to the technical field of metal forging and pressing, in particular to a forging and pressing die for forging and pressing cavity copper parts, which comprises an upper die plate and a lower die plate, a forging and pressing groove is arranged at the top of the lower die plate, a forging and pressing male die is arranged at the bottom of the upper die plate, and the forging and pressing male die penetrates through a top opening of the forging and pressing groove to be embedded into the forging and pressing groove. Therefore, the forging male die of the upper die plate is matched with the forging groove of the lower die plate to form a closed impression for forging a blank; and a discharging through hole and a discharging ejector rod are arranged at the bottom of the forging and pressing groove, and the discharging ejector rod penetrates into the discharging through hole and can be ejected upwards along the discharging through hole, so that the cavity copper piece is ejected out during mold opening. In conclusion, the forging and pressing die is simple in structure and low in cost, blank overflowing can be effectively prevented, the product quality is guaranteed, accurate forging and pressing forming of cavity copper pieces with complex shape characteristics can be achieved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of metal forging, and in particular to a forging die for forging copper parts with forging cavities. Background Technology

[0002] Metal forging, as an important metal processing technology, is widely used in aerospace, automotive, and machinery manufacturing industries. It offers significant advantages, especially in producing parts with complex shapes and high performance requirements. Copper and its alloys, due to their excellent electrical and thermal conductivity and corrosion resistance, are often used to manufacture cavity-type parts, such as heat sinks for electronic devices, connector housings, and fluid control valve bodies.

[0003] Traditional mold designs for forging cavity copper parts typically employ a sleeve structure to effectively constrain and guide the blank and ensure forging precision. In this structure, the mold mainly consists of an upper mold, a lower mold, and a sleeve. The lower mold is placed at the bottom of the cylindrical space within the sleeve, with the inner wall of the sleeve fitting the shape of the lower mold to form a closed or semi-closed cavity. During forging, the pre-made copper blank is placed on top of the lower mold within the cylindrical space. Then, pressure equipment such as a hydraulic press drives the upper mold downwards through the opening of the cylindrical space within the sleeve, entering the sleeve's interior. Working in conjunction with the lower mold, they apply significant pressure to the blank, causing it to flow and deform within the mold cavity, ultimately forming the pre-set cavity copper part shape.

[0004] Sleeves play an important role in traditional forging dies, with main functions including: constraining the flow of blank, improving forming accuracy, and supporting the die structure.

[0005] However, this type of mold structure with a sleeve also brings some inherent disadvantages: complex structure, high manufacturing cost, cumbersome mold assembly and disassembly, limited mold design flexibility, and high equipment requirements.

[0006] While traditional sleeve structures can improve forging results in some aspects, their complex structure, high cost, and limitations in design and use have become bottlenecks restricting their wider application. Especially in today's pursuit of efficient and low-cost manufacturing, finding a forging die technology that can simplify die structure, reduce costs, and simultaneously ensure product quality and production efficiency is of paramount importance. Utility Model Content

[0007] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0008] This utility model provides a forging die for forging a copper cavity, including an upper die and a lower die. The top of the lower die is provided with a forging groove, and the bottom of the upper die is provided with a forging punch. The forging punch passes through the top opening of the forging groove and is embedded in the forging groove, so that the forging punch of the upper die and the forging groove of the lower die cooperate with each other to form a closed die cavity for forging the blank. The bottom of the forging groove is provided with a discharge through hole and a discharge ejector. The discharge ejector passes through the discharge through hole and can be ejected upward along the discharge through hole, so that the copper cavity is ejected when the die is opened.

[0009] Furthermore: the opening at the end of the discharge through hole facing the forging groove is set as a conical countersunk hole, and the end of the discharge push rod corresponding to the end of the conical countersunk hole is provided with a conical enlargement. The conical enlargement can be embedded in the conical countersunk hole, so that the conical sidewall of the conical countersunk hole forms a limiting support for the conical enlargement, and keeps the top of the conical enlargement flush with the bottom of the forging groove.

[0010] Furthermore: the opening at the end of the discharge through hole facing the forging groove is set as a cylindrical countersunk hole, and the end of the discharge push rod corresponding to the cylindrical countersunk hole is provided with a cylindrical enlarged part. The cylindrical enlarged part can be embedded in the cylindrical countersunk hole, so that the bottom wall of the cylindrical countersunk hole forms a limiting support for the cylindrical enlarged part, and the top of the cylindrical enlarged part is kept flush with the bottom of the forging groove.

[0011] Furthermore: the forging punch has two sets of triangular protrusions symmetrically arranged relative to the center line of the die, thereby forging and forming two sets of symmetrical recessed cavities on the cavity copper part.

[0012] Furthermore, the forging punch is also provided with two sets of stepped notches symmetrically arranged relative to the center line of the die, so as to forge two sets of symmetrical side platforms on the cavity copper part.

[0013] Furthermore, the forging punch is also provided with a U-shaped groove and a semi-circular groove, thereby forging and forming the U-shaped protrusion and semi-circular protrusion on the cavity copper part.

[0014] Furthermore: the bottom of the forging groove is provided with a central protrusion, thereby forming a central groove on the copper part of the forging cavity.

[0015] Furthermore, the bottom of the forging groove is also provided with a frame-shaped groove, thereby forming the frame-shaped protrusion on the copper part of the forging cavity.

[0016] Furthermore: the bottom of the frame-shaped groove is provided with a small pit, which is used to form small bumps on the surface of the frame-shaped protrusion.

[0017] Furthermore, the side wall of the forging groove is also provided with a U-shaped notch, and the upper template is provided with a U-shaped protrusion corresponding to the position of the U-shaped notch, so that the U-shaped protrusion is embedded in the U-shaped notch during the forging process, thereby forging and forming the side ear plate of the copper part of the cavity.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. Simplified mold structure and reduced costs: This invention eliminates the traditional sleeve structure, directly setting a forging groove on the top of the lower mold plate, and using the forging punch of the upper mold plate to directly pass through the top opening of the forging groove and embed into the forging groove, forming a closed mold cavity. This design reduces the number of parts, simplifies the mold structure, significantly reduces manufacturing costs, and facilitates market promotion.

[0020] 2. High-efficiency material discharge: A discharge through-hole is provided in the lower mold plate, and a discharge ejector is installed in the discharge through-hole. When the mold is opened, the discharge ejector pushes out the cavity copper part, causing the cavity copper part in the forging groove to be separated from the forging groove, which is convenient for quick removal and improves the efficiency of forging material discharge.

[0021] 3. Prevent blank overflow and ensure product quality: The discharge through-hole opening is designed as a conical countersunk hole or a cylindrical countersunk hole as required, and the end of the discharge ejector rod is correspondingly provided with a conical or cylindrical enlarged section. During the forging process, the conical sidewall of the conical countersunk hole or the bottom wall of the cylindrical countersunk hole can effectively limit and support the enlarged section, preventing the discharge ejector rod from moving downward under pressure, avoiding blank material from entering the discharge through-hole, ensuring product forming accuracy and quality, and reducing the scrap rate.

[0022] 4. Achieve diversified forming: By setting various protrusions, grooves, and notches of different shapes in the forging punch and forging groove, such as triangular protrusions, stepped notches, U-shaped grooves, and semi-circular grooves in the forging punch, and centered protrusions, frame-shaped grooves, and U-shaped notches in the forging groove, the plastic deformation and flow of the blank during the forging process can be precisely controlled. A variety of complex structures such as recessed cavities, side platforms, U-shaped protrusions, semi-circular protrusions, centered grooves, frame-shaped protrusions, and side ear plates on the cavity copper parts can be formed in one step, reducing subsequent processing steps and improving production efficiency and product quality stability.

[0023] With the above improvements, the forging die of this utility model is not only simple in structure and low in cost, but also effectively prevents the blank from overflowing, ensures product quality, and can achieve precise forging of cavities with complex shapes, thus improving production efficiency.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional schematic diagram of the upper mold base and the lower mold base of this utility model;

[0027] Figure 2 This is a cross-sectional schematic diagram of the upper and lower templates of this utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the forging punch and the cavity copper part of this utility model in a separated state;

[0029] Figure 4 This is a structural schematic diagram of the lower template and the cavity copper parts of this utility model in a separated state;

[0030] Figure 5 This is a cross-sectional schematic diagram of the conical enlarged part of this utility model;

[0031] Figure 6 This is a schematic diagram of the cylindrical countersunk hole and the discharge through hole of this utility model;

[0032] Figure 7 This is a cross-sectional schematic diagram of the cylindrical enlarged part of this utility model;

[0033] Figure 8 This is a schematic diagram of the upper mold base and lower mold base of this utility model.

[0034] The reference numerals and names in the figure are as follows:

[0035] 10 Upper die base; 11 Upper template; 12 U-shaped protrusion; 13 Forging punch; 14 Triangular protrusion; 15 Shallow protrusion; 16 Step notch; 17 U-shaped groove; 18 Semi-circular groove; 20 Lower die base; 21 Lower template; 22 Forging groove; 23 Centered protrusion; 24 Frame-shaped groove; 25 Small pit; 26 U-shaped notch; 30 Through hole for material discharge; 31 Conical countersunk hole; 32 Cylindrical countersunk hole; 40 Material discharge ejector; 41 Conical enlargement; 42 Cylindrical enlargement; 50 Cavity copper part; 51 Recessed cavity; 52 Shallow groove; 53 Side platform; 54 U-shaped protrusion; 55 Semi-circular protrusion; 56 Centered groove; 57 Frame-shaped protrusion; 58 Small protrusion; 59 Side ear plate. Detailed Implementation

[0036] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] Please see Figures 1 to 8 In this embodiment of the present invention, a forging die for forging a cavity copper part includes an upper template 11 and a lower template 21. The top of the lower template 21 is provided with a forging groove 22, and the bottom of the upper template 11 is provided with a forging punch 13. The forging punch 13 passes through the top opening of the forging groove 22 and is embedded in the forging groove 22, so that the forging punch 13 of the upper template 11 and the forging groove 22 of the lower template 21 cooperate with each other to form a closed die cavity for forging the blank. The bottom of the forging groove 22 is provided with a discharge through hole 30 and a discharge ejector 40. The discharge ejector 40 passes through the discharge through hole 30 and can be ejected upward along the discharge through hole 30, so that the cavity copper part 50 is ejected when the die is opened.

[0038] Specifically, traditional forging dies typically have a sleeve, with the lower die positioned at the bottom of the cylindrical space within the sleeve. The blank is then placed on top of the lower die within the cylindrical space, and a hydraulic device drives the upper die to enter through the opening in the cylindrical space, forging the blank into a predetermined shape. Due to the sleeve design, the entire die structure is relatively complex and costly, hindering its widespread adoption.

[0039] This invention directly sets a forging groove 22 on the top of the lower template 21, and uses the forging punch 13 of the upper template 11 to directly pass through the top opening of the forging groove 22 and embed into the forging groove 22 to form a closed mold cavity. This allows the blank in the forging groove 22 to be forged into a cavity copper part 50, thereby realizing the forging and forming operation of the blank. This reduces the use of sleeves, simplifies the mold structure, reduces mold costs, and facilitates market promotion.

[0040] Secondly, a discharge through hole 30 is provided in the lower template 21, and a discharge ejector 40 is provided in the discharge through hole 30. When the mold is opened, the discharge ejector 40 ejects the cavity copper part 50, so that the cavity copper part 50 in the forging groove 22 is separated from the forging groove 22, which facilitates discharge and improves the efficiency of forging discharge.

[0041] In one embodiment, such as Figure 4 and Figure 5As shown, preferably, the opening of the discharge through hole 30 facing the forging groove 22 is provided as a conical countersunk hole 31, and the discharge push rod 40 is provided with a conical enlarged part 41 at the end corresponding to the conical countersunk hole 31. The conical enlarged part 41 can be embedded in the conical countersunk hole 31, so that the conical sidewall of the conical countersunk hole 31 forms a limiting support for the conical enlarged part 41, and the top of the conical enlarged part 41 is kept flush with the bottom of the forging groove 22.

[0042] Specifically, since the ejector pin 40 is located at the bottom of the forging groove 22, it will also be subjected to a certain amount of compressive force during the forging process. Therefore, a conical countersunk hole 31 can be provided at the bottom of the forging groove 22. This allows the conical enlarged part 41 of the ejector pin 40 to be accommodated within the conical countersunk hole 31, keeping the bottom of the forging groove 22 flush with the top of the conical enlarged part 41, which facilitates the forging operation of the billet. Furthermore, the conical sidewall of the conical countersunk hole 31 can be used to provide limiting support for the conical enlarged part 41. The design of the conical countersunk hole 31 helps prevent the conical enlarged part 41 of the ejector pin 40 from being squeezed downwards during the forging process, thereby preventing the billet material from entering the ejector through hole 30, ensuring product quality and improving production efficiency.

[0043] Secondly, the shape of the conical enlarged part 41 can be set to be conical according to the shape of the conical countersunk hole 31, so that when it is embedded in the conical countersunk hole 31, they match each other perfectly and form a tight fit, thus preventing the blank from overflowing.

[0044] In another embodiment, such as Figure 6 and Figure 7 As shown, preferably, the opening of the discharge through hole 30 facing the forging groove 22 is provided as a cylindrical countersunk hole 32, and the end of the discharge push rod 40 corresponding to the cylindrical countersunk hole 32 is provided with a cylindrical enlarged part 42. The cylindrical enlarged part 42 can be embedded in the cylindrical countersunk hole 32, so that the bottom wall of the cylindrical countersunk hole 32 forms a limiting support for the cylindrical enlarged part 42, and the top of the cylindrical enlarged part 42 is kept flush with the bottom of the forging groove 22.

[0045] Similarly, the design of the cylindrical countersunk hole 32 is similar to that of the conical countersunk hole 31, also intended to accommodate the cylindrical enlarged portion 42 and provide it with limiting support. Furthermore, the cylindrical countersunk hole 32 can be set to a relatively deep depth to accommodate the cylindrical enlarged portion 42 of the discharge ejector rod 40 of a corresponding length. The deeper countersunk hole and the longer cylindrical enlarged portion 42 help to more effectively seal the discharge through hole 30, preventing the billet from overflowing into the interior during forging.

[0046] Secondly, the cylindrical enlarged part 42 can be set to a cylindrical shape according to the shape of the cylindrical countersunk hole 32, so that when it is embedded in the cylindrical countersunk hole 32, they match each other perfectly and form a tight fit, preventing the billet from overflowing. In addition, the opening of the discharge through hole 30 is set as a conical countersunk hole 31 or a cylindrical countersunk hole 32 as required. The screw head at the end of the discharge ejector rod 40 is embedded in the corresponding hole, and the top of the screw head is flush with the bottom of the forging groove 22. Among them, the conical sidewall of the conical countersunk hole 31 forms a slope limit for the screw head, and the bottom wall of the countersunk hole forms a planar limit for the screw head. Both of these can keep the discharge ejector rod 40 in the preset position to assist the billet in forging.

[0047] like Figure 3 and Figure 4 As shown, preferably, the forging punch 13 is provided with two sets of triangular protrusions 14 symmetrically arranged with respect to the center line of the die, so as to forge two sets of recessed cavities 51 symmetrical to each other on the cavity copper part 50.

[0048] Specifically, in order to form the recessed cavity 51 on the upper surface of the copper cavity part 50, a corresponding triangular protrusion 14 needs to be set on the forging punch 13, so as to forge the recessed cavity 51 into a cavity of the preset triangular shape.

[0049] Secondly, between the two sets of triangular protrusions 14, a shallow protrusion 15 with a height less than that of the triangular protrusions 14 can be provided, thereby forging and forming a shallow groove 52 between the two sets of recessed cavities 51.

[0050] like Figure 3 and Figure 4 As shown, preferably, the forging punch 13 is also provided with two sets of stepped notches 16 symmetrically arranged with respect to the center line of the die, so as to forge two sets of side platforms 53 symmetrical to each other on the cavity copper part 50.

[0051] Specifically, in order to form the side platforms 53 at both ends of the cavity copper part 50, and make the position of the side platforms 53 higher than the upper surface of the cavity copper part 50, step notches 16 can be set at both ends of the forging punch 13. By squeezing the edge area of ​​the blank during forging, the material is made to bulge towards the step notches 16, thereby forming the side platform 53 part that is higher than the upper surface of the cavity copper part 50.

[0052] like Figure 3 and Figure 4 As shown, preferably, the forging punch 13 is also provided with a U-shaped groove 17 and a semi-circular groove 18, so as to forge and form the U-shaped protrusion 54 and the semi-circular protrusion 55 on the cavity copper part 50.

[0053] Specifically, in order to form the U-shaped protrusions 54 and semi-circular protrusions 55 on both sides of the cavity copper part 50, U-shaped grooves 17 and semi-circular grooves 18 can be provided on both sides of the forging punch 13, so that the blank can be repositioned and formed during the forging operation, thereby forming the corresponding protrusions.

[0054] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, preferably, the bottom of the forging groove 22 is provided with a central protrusion 23, thereby forming a central groove 56 on the forging cavity copper part 50.

[0055] Specifically, in order to form a central groove 56 in the middle of the lower surface of the cavity copper part 50, a central protrusion 23 can be set in the middle of the bottom of the forging groove 22. The central protrusion 23 is used to lift the lower surface of the blank to form the corresponding central groove 56.

[0056] like Figure 3 , Figure 4 and Figure 6 As shown, preferably, the bottom of the forging groove 22 is also provided with a frame-shaped groove 24, so that the frame-shaped protrusion 57 on the forging forming cavity copper part 50 is formed.

[0057] Specifically, in order to form a frame-shaped protrusion 57 on the lower surface of the cavity copper part 50, so that the frame-shaped protrusion 57 forms an enclosure on the lower surface, thereby enclosing the cavity on the lower surface, and so that the central groove 56 is located in the middle of the cavity on the lower surface, a corresponding frame-shaped groove 24 can also be provided at the bottom of the forging groove 22. The frame-shaped groove 24 is used to guide and extend the blank during the forging process, thereby forming the corresponding frame-shaped protrusion 57.

[0058] Secondly, the central protrusion 23 at the bottom of the forging groove 22 is located in the central area of ​​the frame-shaped groove 24. When the blank is forged, the frame-shaped groove 24 guides the material to extend to the surrounding area to form the frame-shaped protrusion 57, while the central protrusion 23 squeezes the material to form the central groove 56 located in the center of the area enclosed by the frame-shaped protrusion 57.

[0059] like Figure 3 , Figure 4 and Figure 6 As shown, preferably, the bottom of the frame-shaped groove 24 is provided with a small pit 25 for forming a small protrusion 58 on the surface of the frame-shaped protrusion 57.

[0060] Specifically, in order to form corresponding small protrusions 58 on the frame-shaped protrusion 57, making them the highest contact points on the lower surface of the cavity copper part 50 for easy contact with external devices, small pits 25 can also be provided at the bottom of the frame-shaped groove 24. Under the forging action of the forging punch 13 of the upper template 11, the blank undergoes a certain plastic deformation, thereby forming the corresponding small protrusions 58. That is, the small pits 25 at the bottom of the frame-shaped groove 24 are filled by the blank during forging, causing the material to bulge into the pit, thereby forming the corresponding small protrusions 58 on the surface of the frame-shaped protrusion 57.

[0061] like Figures 3 to 7 As shown, preferably, the sidewall of the forging groove 22 is also provided with a U-shaped notch 26, and the upper template 11 is provided with a U-shaped protrusion 12 corresponding to the position of the U-shaped notch 26, so that the U-shaped protrusion 12 is embedded in the U-shaped notch 26 during the forging process, thereby forging and forming the side ear plate 59 on the side of the cavity copper part 50.

[0062] Specifically, in order to support, fix or install the cavity copper part 50, a lateral ear plate 59 needs to be set on its side. Therefore, a U-shaped notch 26 can be set on the side wall of the forging groove 22, and a U-shaped protrusion 12 can be set at the corresponding position on the upper template 11. The forging driving force of the external hydraulic equipment is used to make the U-shaped protrusion 12 embedded in the U-shaped notch 26 and forged downward, so that the blank produces corresponding plastic deformation and plastic flow, thereby extending into the U-shaped notch 26, and forging the corresponding lateral ear plate 59.

[0063] like Figure 8 As shown, preferably, the forging die further includes an upper die holder 10 and a lower die holder 20. The upper die holder 10 is used to mount the upper die plate 11, and the lower die holder 20 is used to mount the lower die plate 21. On an external forging device, the upper die plate 11 is mounted on the downward driving part of the forging device via the upper die holder 10, so that the upper die plate 11 is driven by the forging device to perform forging operations. The lower die plate 21 is mounted on the pressure-bearing worktable of the forging device via the lower die holder 20 to perform auxiliary forging operations.

[0064] After the mold opens, the ejector pin 40 moves along the ejector hole 30 to eject the forging. The lower die base 20 may be equipped with an ejector device (not shown in the figure) to drive the ejector pin 40 upwards, completing the ejection operation. Alternatively, a preload spring (not shown in the figure) may be installed at the end of the ejector pin 40 furthest from the forging groove 22, so that during forging, the ejector pin 40 is pushed downwards, compressing the preload spring. Subsequently, during mold opening, after the upper die plate 11 moves upwards, the pressure on the forging and the ejector pin 40 is released, allowing the preload spring to return to its original state, and its elastic force ejects the forging.

[0065] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A forging die for forging a copper part with a forging cavity, comprising an upper die (11) and a lower die (21), characterized in that, The lower template (21) is provided with a forging groove (22) at the top, and the upper template (11) is provided with a forging punch (13) at the bottom. The forging punch (13) passes through the top opening of the forging groove (22) and is embedded in the forging groove (22), so that the forging punch (13) of the upper template (11) and the forging groove (22) of the lower template (21) cooperate with each other to form a closed mold cavity for forging blanks. The bottom of the forging groove (22) is provided with a discharge through hole (30) and a discharge ejector (40). The discharge ejector (40) passes through the discharge through hole (30) and can be ejected upward along the discharge through hole (30), so that the cavity copper part (50) can be ejected when the mold is opened.

2. The forging die for forging cavity copper parts according to claim 1, characterized in that, The opening of the discharge through hole (30) facing the forging groove (22) is provided as a conical countersunk hole (31). The discharge push rod (40) is provided with a conical enlarged part (41) at the end corresponding to the conical countersunk hole (31). The conical enlarged part (41) can be embedded in the conical countersunk hole (31), so that the conical sidewall of the conical countersunk hole (31) forms a limiting support for the conical enlarged part (41), and the top of the conical enlarged part (41) is flush with the bottom of the forging groove (22).

3. A forging die for forging cavity copper parts according to claim 1, characterized in that, The opening of the discharge through hole (30) facing the forging groove (22) is set as a cylindrical countersunk hole (32). The end of the discharge push rod (40) corresponding to the cylindrical countersunk hole (32) is provided with a cylindrical enlarged part (42). The cylindrical enlarged part (42) can be embedded in the cylindrical countersunk hole (32), so that the bottom wall of the cylindrical countersunk hole (32) forms a limiting support for the cylindrical enlarged part (42), and the top of the cylindrical enlarged part (42) is flush with the bottom of the forging groove (22).

4. A forging die for forging cavity copper parts according to claim 1, characterized in that, The forging punch (13) is provided with two sets of triangular protrusions (14) symmetrically arranged relative to the center line of the die, thereby forging and forming two sets of recessed cavities (51) symmetrical to each other on the cavity copper part (50).

5. A forging die for forging cavity copper parts according to claim 1, characterized in that, The forging punch (13) is also provided with two sets of stepped notches (16) symmetrically arranged relative to the center line of the die, so as to forge two sets of side platforms (53) symmetrical to each other on the cavity copper part (50).

6. A forging die for forging cavity copper parts according to claim 1, characterized in that, The forging punch (13) is also provided with a U-shaped groove (17) and a semi-circular groove (18) to forge and form the U-shaped protrusion (54) and semi-circular protrusion (55) on the cavity copper part (50).

7. A forging die for forging cavity copper parts according to claim 1, characterized in that, The bottom of the forging groove (22) is provided with a central protrusion (23), thereby forging the central groove (56) on the forging cavity copper part (50).

8. A forging die for forging cavity copper parts according to claim 1, characterized in that, The bottom of the forging groove (22) is also provided with a frame-shaped groove (24), thereby forming a frame-shaped protrusion (57) on the forging cavity copper part (50).

9. A forging die for forging cavity copper parts according to claim 8, characterized in that, The bottom of the frame-shaped groove (24) is provided with a small pit (25) for forming small bumps (58) on the surface of the frame-shaped protrusion (57).

10. A forging die for forging cavity copper parts according to claim 1, characterized in that, The side wall of the forging groove (22) is also provided with a U-shaped notch (26), and the upper template (11) is provided with a U-shaped protrusion (12) corresponding to the position of the U-shaped notch (26), so that the U-shaped protrusion (12) is embedded in the U-shaped notch (26) during the forging process, and then the side ear plate (59) of the cavity copper part (50) is forged.

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