Multi-directional forging die and forming method for bidirectional flanged hollow rotary forgings

Abstract

The invention discloses a multi-directional die forging die and forming method for a hollow rotary body forging with a bidirectional flange. The die comprises a one-fire die forging die and a two-fire die forging die. The one-fire die forging die comprises a one-fire upper punch, a one-fire lower die core and a one-fire lower ejection assembly, and the one-fire lower die core is provided with a cavity with a T-shaped cross section; the two-fire die forging die comprises a die base, a two-fire lower die core, a two-fire upper die core, a T-shaped pressure ring, a left horizontal punch, a right horizontal punch, a two-fire upper punch and a two-fire lower ejection assembly, the die base is provided with a cavity with an open top, the two-fire lower die core and the two-fire upper die core are respectively arranged at the lower part and the upper part of the cavity, the left horizontal punch and the right horizontal punch penetrate the cavity wall of the die base and are located between the two-fire lower die core and the two-fire upper die core, a T-shaped pressure ring is provided on the upper part of the two-fire upper die core, and the two-fire upper punch penetrates the T-shaped pressure ring. The present invention adopts a composite parting mode with multiple parting surfaces, and directly forms the final forging flange, the boss structure on the flange and the inner hole through two closed extrusion forming processes.

Description

Technical Field

[0001] The invention relates to a die, in particular to a multi-directional die forging die for a hollow rotating body-type forging with a bidirectional flange and a forming method. Background Art

[0002] Hollow rotating forgings with bidirectional flanges and multiple boss structures distributed circumferentially on the flanges are mostly formed by casting, but casting products have problems with low performance and unstable performance. With the continuous improvement of usage requirements, casting products can no longer meet performance requirements. Free forging cannot form the boss structure and inner hole on the flange end face, and the material utilization rate is low. Ordinary die forging is difficult to form the boss structure distributed circumferentially on the flange. Even if the boss structure can be formed, it cannot be demolded. In addition, there is a trimming process. The material utilization rate is not much higher than that of free forging, and the performance cannot be guaranteed. Summary of the invention

[0003] The present invention aims to solve the above technical problems, thereby providing a multi-directional forging die and forming method for bidirectional hollow rotating body forgings with flanges, which can directly forge the forging flange, the boss structure on the flange and the inner hole, improve product quality and production efficiency.

[0004] The present invention solves the technical problem and adopts the following technical solution:

[0005] A multi-directional die forging die for a hollow rotating body forging with a bidirectional flange, comprising a first-fire die forging die and a second-fire die forging die, wherein the first-fire die forging die comprises a fire upper punch, a fire lower die core and a fire lower ejector assembly, and the fire lower die core is provided with a cavity with a T-shaped cross section;

[0006] The two-fire forging die comprises a die base, a two-fire lower die core, a two-fire upper die core, a T-shaped pressure ring, a left horizontal punch, a right horizontal punch, a two-fire upper punch and a two-fire lower ejection assembly. The die base is provided with a die cavity with an open top. The two-fire lower die core and the two-fire upper die core are respectively arranged at the lower and upper parts of the die cavity. The left horizontal punch and the right horizontal punch penetrate the cavity wall of the die base and are located between the two-fire lower die core and the two-fire upper die core. A T-shaped pressure ring is provided on the upper part of the two-fire upper die core, and the two-fire upper punch penetrates the T-shaped pressure ring.

[0007] The forming method of the above-mentioned bidirectional flanged hollow rotary body forging multi-directional die forging die is carried out according to the following steps:

[0008] S1, the first fire upper punch of the first fire die forging die is connected to the moving beam of the first press, the first fire lower ejector rod is connected to the lower ejector cylinder of the first press, the second fire upper punch of the second fire die forging die is connected to the central cylinder of the second press, the T-shaped pressure ring is connected to the moving beam of the second press, the second fire lower ejector rod is connected to the lower ejector cylinder of the second press, and the left horizontal punch and the right horizontal punch are respectively connected to the left horizontal cylinder and the right horizontal cylinder of the second press;

[0009] S2, heating the blank and the first-fire forging die;

[0010] S3, One Fire Forging

[0011] The blank is placed on a lower-fire top block in a lower-fire die core, and is pressed downward by an upper-fire punch to form a fire forging;

[0012] S4, the upper punch returns to the first fire, and the lower ejector assembly ejects the first fire forging out of the lower die core;

[0013] S5, heating of the second-fire die forging die;

[0014] S6, one-fire forging heating

[0015] The left lower die core and the right lower die core are placed on a fire forging, the cavities of the left lower die core and the right lower die core are fitted with the lower flange of the fire forging, and they are heated together to the initial forging temperature and kept warm;

[0016] S7, the second fire lower ejector pushes the second fire lower ejector block out of the upper end surface of the die base, and the first fire forging, the left lower die core and the right lower die core are placed on the second fire lower ejector block, the second fire lower ejector rod and the second fire lower ejector block return to their original positions, and the first fire forging, the left lower die core and the right lower die core fall into the bottom of the die base die cavity;

[0017] S8, the left horizontal punch and the right horizontal punch are pushed out to their proper positions;

[0018] S9, the left upper die core and the right upper die core are placed in the die base, the left upper die core and the right upper die core are in contact with the upper end surfaces of the left horizontal punch and the right horizontal punch respectively, the T-shaped pressure ring moves down to the position and applies pressure, after the pressure is maintained, the left horizontal punch and the right horizontal punch apply pressure in the horizontal direction and maintain the pressure, the second fire upper punch moves down to press and move into position, and the final forging is formed;

[0019] S10, demoulding

[0020] The pressure in all directions is unloaded, the left horizontal punch and the right horizontal punch return to exit the die base, the second fire upper punch and the T-shaped pressure ring return upward, the second fire lower ejector rod is ejected upward, and the second fire lower ejector block, the final forging, the left lower die core, the right lower die core, the left upper die core and the right upper die core are ejected from the die base, the left upper die core and the right upper die core move horizontally opposite to each other to demold the final forging, the left lower die core and the right lower die core move upward first and then move horizontally opposite to each other to demold the final forging, and finally the demolding of the final forging is completed.

[0021] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects:

[0022] The composite parting method with multiple parting surfaces is adopted, and the final forging flange, the boss structure on the flange and the inner hole are directly formed through two closed extrusion forming processes. It has the characteristics of near-net forming without flash and small or no draft angle, ensuring the continuity of the overall streamline, retaining all the surface features of the final forging while ensuring smooth demolding, and at the same time making the metal deform under three-way compressive stress, which fundamentally improves the mechanical properties of the final forging, extends the service life of the final forging, and has good forming quality, excellent comprehensive performance, and improved production efficiency.

[0023] Further, the optimization scheme of the present invention is:

[0024] The under-fire ejection assembly comprises an under-fire ejector block and an under-fire ejector rod. The bottom of an under-fire mold core is provided with an ejection hole which is connected with the mold cavity. The under-fire ejector block is placed in the ejection hole. The bottom of the under-fire ejector block is provided with an ejection rod.

[0025] The step surface of the lower die core cavity is matched with the lower flange portion of the final forging.

[0026] The two-fire lower die core comprises a left lower die core and a right lower die core, the left lower die core and the right lower die core are symmetrically arranged, and the cavities of the left lower die core and the right lower die core are adapted to the lower flange portion of the final forging.

[0027] The two-fire upper die core comprises a left upper die core and a right upper die core, the left upper die core and the right upper die core are symmetrically arranged, and the cavities of the left upper die core and the right upper die core are adapted to the upper flange portion of the final forging.

[0028] The two-fire lower ejection assembly includes a two-fire lower ejector block and a two-fire lower ejector rod. A groove is provided at the bottom of the mold base mold cavity, and the two-fire lower ejector block is placed in the groove. The mold base is provided with a two-fire ejection hole that passes through the mold cavity. The two-fire lower ejector rod is placed in the two-fire ejection hole, and the two-fire lower ejector block is in a convex shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the final forging according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the boss structure on the lower end surface of the upper flange part and the upper end surface of the lower flange part of the final forging;

[0031] Figure 3 is a schematic diagram of a fire forging according to an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of a state in which a blank according to an embodiment of the present invention is placed in a fire forging die;

[0033] Figure 5 It is a schematic diagram of a mold closing state of a fire die forging mold according to an embodiment of the present invention;

[0034] Figure 6 It is a schematic diagram of placing a first-fire forging piece into a second-fire forging die according to an embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of the mold closing state of the two-fire forging mold according to an embodiment of the present invention;

[0036] Figure 8 It is a schematic diagram of the demoulding state of the double-fire forging die according to an embodiment of the present invention.

[0037] In the figure: a first-fire upper punch 1; a first-fire lower die core 2; a first-fire lower ejector block 3; a first-fire lower ejector rod 4; a second-fire upper punch 5; a T-shaped pressure ring 6; a left upper die core 7; a right upper die core 8; a left horizontal punch 9; a right horizontal punch 10; a left lower die core 11; a right lower die core 12; a second-fire lower ejector block 13; a second-fire lower ejector rod 14; a die base 15; a first-fire forging 16; an unformed upper flange portion 16-1; a cylindrical portion 16-2; a pre-forged lower flange portion 16-3; a final forging 17; an upper flange portion 17-1; a sleeve portion 17-2; a lower flange portion 17-3; a boss structure 17-4; a concave structure 17-5; and a blank 18. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0039] See also Figure 1-Figure 3 The final forging 17 in this embodiment is composed of an upper flange portion 17-1, a sleeve portion 17-2 and a lower flange portion 17-3. The upper flange portion 17-1, the sleeve portion 17-2 and the lower flange portion 17-3 are all cylindrical. There is no requirement for the diameter size of the upper flange portion 17-1 and the lower flange portion 17-3. The diameters of the upper flange portion 17-1 and the lower flange portion 17-3 are both larger than the diameter of the sleeve portion 17-2. The overall structure of the final forging 17 is I-shaped, X-shaped, nearly I-shaped or nearly X-shaped. The lower end surface of the upper flange portion 17-1 and the upper end surface of the lower flange portion 17-3 of the final forging 17 are both provided with a boss structure 17-4 distributed along the circumferential direction. The boss structure 17-4 is cylindrical, and an inner concave structure 17-5 is provided on the outer side of the boss structure 17-4. The inner concave structure 17-5 is a columnar body. The boss structure 17-4 and the inner concave structure 17-5 are evenly or unevenly distributed in the circumferential direction, and the number is not limited.

[0040] This embodiment provides a multi-directional die forging die for a hollow rotating body forging with a bidirectional flange, which is composed of a single-fire die forging die and a double-fire die forging die. The single-fire die forging die is mainly composed of a single-fire upper punch 1, a single-fire lower die core 2 and a single-fire lower ejector assembly ( Figure 4As shown in the figure, the bottom of the upper punch 1 is provided with a shoulder structure, the lower die core 2 is provided with a cavity with a T-shaped cross section, and the step surface of the cavity of the lower die core 2 is provided with a protrusion and a concave portion, which are respectively matched with the concave structure 17-5 and the boss structure 17-4 of the lower flange 17-3 of the final forging 17. The lower ejector assembly is composed of a lower ejector block 3 and a lower ejector rod 4. The bottom of the lower die core 2 is provided with an ejector hole that penetrates the cavity, the lower ejector block 3 is placed in the ejector hole and is slidably connected thereto, and the lower ejector rod 4 is fixedly installed at the bottom of the lower ejector block 3.

[0041] The two-fire die forging die is mainly composed of a two-fire upper punch 5, a T-shaped pressure ring 6, a two-fire lower die core, a two-fire upper die core, a left horizontal punch 9, a right horizontal punch 10, a die base 15 and a two-fire lower ejector assembly. The die base 15 is provided with a die cavity with an open top. The two-fire lower die core is a split structure, which is composed of a left lower die core 11 and a right lower die core 12. The left lower die core 11 and the right lower die core 12 are symmetrically arranged. The cavity of the left lower die core 11 and the right lower die core 12 is matched with the lower flange portion 17-3 of the final forging 17. The left lower die core 11 and the right lower die core 12 are placed at the lower part of the die cavity. The two-fire upper die core is a split structure, which is composed of a left upper die core 7 and a right upper die core 8. The left upper die core 7 and the right upper die core 8 are symmetrically arranged. The cavity of the left upper die core 7 and the right upper die core 8 is matched with the upper flange portion 17-1 of the final forging 7.

[0042] A left horizontal punch 9 and a right horizontal punch 10 are symmetrically arranged between the second fire lower die core and the second fire upper die core. The left horizontal punch 9 and the right horizontal punch 10 both penetrate the cavity wall of the die base 15. The left lower die core 11 and the left upper die core 7 are in contact with the upper end face and the lower end face of the left horizontal punch 9 respectively. The right lower die core 12 and the right upper die core 8 are in contact with the lower end face and the upper end face of the right horizontal punch 10 respectively. A T-shaped pressure ring 6 is arranged on the upper part of the second fire upper die core, and the second fire upper punch 5 penetrates the T-shaped pressure ring 6. The two-fire lower ejection assembly is mainly composed of a two-fire lower ejector block 13 and a two-fire lower ejector rod 14. A groove is provided at the bottom of the mold base 15 mold cavity, and the two-fire lower ejector block 13 is placed in the groove. The two-fire lower ejector block 13 is in a convex shape. The mold base 15 is provided with a two-fire ejection hole that passes through the mold cavity. The two-fire lower ejector rod 14 is placed in the two-fire ejection hole and is slidably connected to the two-fire ejector rod 14. The two-fire lower ejector block 13 is fixedly connected.

[0043] The forming method of the above-mentioned bidirectional flanged hollow rotary body forging multi-directional die forging die is carried out according to the following steps:

[0044] S1, the first fire upper punch 1 of the first fire die forging die is connected to the moving beam of the first press to provide forming force, the first fire lower ejector rod 4 is connected to the lower ejector cylinder of the first press to provide ejection force after forging. The second fire upper punch 5 of the second fire die forging die is connected to the central cylinder of the second press to provide perforation forming force, the T-shaped pressure ring 6 is connected to the moving beam of the second press to provide clamping force, the left horizontal punch 9 and the right horizontal punch 10 are respectively connected to the left horizontal cylinder and the right horizontal cylinder of the second press to provide pressing forming force, and the second fire lower ejector rod 14 is connected to the lower ejector cylinder of the second press to provide ejection force after forging.

[0045] S2. Heating of the blank and the first-fire forging die

[0046] A fire forging die is heated to 300-400°C. The blank 18 is a round bar material with a size of Φ300×513 mm. The blank 18 is heated to the initial forging temperature and is kept warm.

[0047] S3, One Fire Forging

[0048] See also Figure 4 , Figure 5 The blank 18 is placed on a fire-under-forging block 3 in a fire-under-forging core 2, and a fire-over-forging punch 1 is pressed down and pressed into place to form a fire-forged part 16.

[0049] S4, a fire upper punch 1 returns, a fire lower ejector block 3 and a fire lower ejector rod 4 of a fire lower ejector assembly eject a fire forging 16 out of a fire lower die core 2, and cools naturally to room temperature. A fire forging 16 is composed of an unformed upper flange portion 16-1, a cylindrical portion 16-2 and a pre-forged lower flange portion 16-3, and a fire forging 16 is a pre-forging of a final forging 17.

[0050] S5. Heat the second-fire forging die to 300-400℃.

[0051] S6, one-fire forging heating

[0052] See also Figure 6 The left lower mold core 11 and the right lower mold core 12 are placed on a fire forging 16, and the cavities of the left lower mold core 11 and the right lower mold core 12 are fitted with the pre-forged lower flange 16-3 of a fire forging 16, and are heated together to the initial forging temperature and are kept warm.

[0053] S7, the second fire lower push rod 14 pushes the second fire lower push block 13 out of the upper end surface of the die base 15, and the first fire forging 16, the lower left mold core 11 and the lower right mold core 12 are placed on the second fire lower push block 13, the second fire lower push rod 14 and the second fire lower push block 13 return to their original positions, and the first fire forging 16, the lower left mold core 11 and the lower right mold core 12 fall into the bottom of the mold cavity of the die base 15.

[0054] S8, the left horizontal punch 9 and the right horizontal punch 10 are pushed out to their positions, completing the contact with the cylindrical portion 16-2 of a fire forging 16.

[0055] S9, see Figure 7 , the upper end surfaces of the left upper die core 7 and the right upper die core 8 are aligned and placed in the upper part of the die base 15, the left upper die core 7 and the right upper die core 8 are in contact with the upper end surfaces of the left horizontal punch 9 and the right horizontal punch 10 respectively, the T-shaped pressure ring 6 moves down to reach its position and applies pressure, and after maintaining the pressure, pressure is applied in the horizontal direction and maintained, the second fire upper punch 5 moves down to press and reach its position, and the final forging 17 is formed.

[0056] S10, demoulding

[0057] See also Figure 8 , the pressure in all directions is unloaded, the left horizontal punch 9 and the right horizontal punch 10 return to exit the die base 15, the second fire upper punch 5 and the T-shaped pressure ring 6 return upward and lift a sufficient distance, the second fire lower ejector rod 14 is ejected upward, and the second fire lower ejector block 13, the final forging 17, the left lower die core 11, the right lower die core 12, the left upper die core 7 and the right upper die core 8 are ejected from the die base 15. Since neither the left horizontal punch 9 nor the right horizontal punch 10 contacts the final forging 17, the upper left core 7 and the upper right core 8 will separate from the upper flange 17-1 of the final forging 17 in the vertical direction during the ejection process, and then contact the lower left core 11 and the lower right core 12. Subsequently, the final forging 17, the lower left core 11, the lower right core 12, the upper left core 7 and the upper right core 8 are moved out of the die base 15 as a whole, and the upper left core 7 and the upper right core 8 move horizontally opposite to each other to demold the final forging 17. Finally, the lower left core 11 and the lower right core 12 first move upward and then move horizontally opposite to each other to demold the final forging 17, thereby completing the demolding of the final forging 17. After the final forging 17, the lower left mold core 11, the lower right mold core 12, the upper left mold core 7 and the upper right mold core 8 are taken out as a whole, the upper left mold core 7 and the upper right mold core 8 are moved downward a sufficient distance to ensure that the multiple boss structures 17-4 distributed on the circumference of the upper flange part 17-1 are separated first and then separated horizontally oppositely, and then the lower left mold core 11 and the lower right mold core 12 are lifted upward to a sufficient height to ensure that the multiple boss structures 17-4 distributed on the circumference of the lower flange part 17-3 are separated first and then separated horizontally oppositely, thereby completing the demolding of the final forging 17.

[0058] The forming method of the present invention is to put a round bar blank heated to a forging temperature into a first-fire mold for first-fire forging, obtain a first-fire forging after the first-fire forging, assemble the first-fire forging with a left lower mold core and a right lower mold core after the first-fire forging is cooled to room temperature, heat them to the forging temperature again, put them into a second-fire mold for second-fire forging, and obtain a final forging after the second-fire forging. The present invention retains all surface features of the final forging while ensuring smooth demoulding, the metal streamlines are complete in the overall forming process, the final forging has good forming quality, excellent comprehensive performance, changes the shortcomings of the existing process, and increases the service life of the final forging.

[0059] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent structural changes made using the contents of the present invention description and drawings are included in the scope of rights of the present invention.

Claims

1. A multi-directional die forging die for a hollow rotating body forging with a bidirectional flange, wherein the final forging is composed of an upper flange portion, a sleeve portion and a lower flange portion, and the lower end surface of the upper flange portion and the upper end surface of the lower flange portion of the final forging are both provided with boss structures distributed along the circumferential direction, and the multi-directional die forging die comprises a single-fire die forging die and a double-fire die forging die, and is characterized in that: The fire die forging die comprises a fire upper punch, a fire lower die core and a fire lower ejector assembly, wherein the fire lower die core is provided with a cavity with a T-shaped cross section; the step surface of the cavity of the fire lower die core is adapted to the lower flange of the final forging; The two-fire die forging die comprises a die base, a two-fire lower die core, a two-fire upper die core, a T-shaped pressure ring, a left horizontal punch, a right horizontal punch, a two-fire upper punch and a two-fire lower ejector assembly. The die base is provided with a die cavity with an open top, and the two-fire lower die core and the two-fire upper die core are respectively arranged at the lower part and the upper part of the die cavity; The two-fire lower mold core is a split structure, and the two-fire lower mold core is composed of a left lower mold core and a right lower mold core, the left lower mold core and the right lower mold core are symmetrically arranged, and the cavities of the left lower mold core and the right lower mold core are adapted to the lower flange portion of the final forging; The two-fire upper die core is a split structure, and the two-fire upper die core is composed of a left upper die core and a right upper die core, the left upper die core and the right upper die core are symmetrically arranged, and the cavities of the left upper die core and the right upper die core are adapted to the upper flange portion of the final forging; The left horizontal punch and the right horizontal punch penetrate the cavity wall of the die base and are located between the second fire lower die core and the second fire upper die core. The left horizontal punch and the right horizontal punch are symmetrically arranged. The left lower die core and the left upper die core are in contact with the upper end face and the lower end face of the left horizontal punch respectively. The right lower die core and the right upper die core are in contact with the lower end face and the upper end face of the right horizontal punch respectively. A T-shaped pressure ring is arranged on the upper part of the second-fire upper die core, and the second-fire upper punch penetrates the T-shaped pressure ring.

2. The multi-directional forging die for bidirectional hollow rotating body forgings with flanges according to claim 1, characterized in that: The under-fire ejection assembly comprises an under-fire ejector block and an under-fire ejector rod. The bottom of an under-fire mold core is provided with an ejection hole which is connected with the mold cavity. The under-fire ejector block is placed in the ejection hole. The bottom of the under-fire ejector block is provided with an ejection rod.

3. The multi-directional forging die for bidirectional hollow rotating body forgings with flanges according to claim 2, characterized in that: The two-fire lower ejection assembly includes a two-fire lower ejector block and a two-fire lower ejector rod. A groove is provided at the bottom of the mold base mold cavity, and the two-fire lower ejector block is placed in the groove. The mold base is provided with a two-fire ejection hole that passes through the mold cavity. The two-fire lower ejector rod is placed in the two-fire ejection hole, and the two-fire lower ejector block is in a convex shape.

4. A forming method of a multi-directional forging die for a hollow rotating body forging with a bidirectional flange as claimed in claim 3, comprising the following steps: S1, the first fire upper punch of the first fire die forging die is connected to the moving beam of the first press, the first fire lower ejector rod is connected to the lower ejector cylinder of the first press, the second fire upper punch of the second fire die forging die is connected to the central cylinder of the second press, the T-shaped pressure ring is connected to the moving beam of the second press, the second fire lower ejector rod is connected to the lower ejector cylinder of the second press, and the left horizontal punch and the right horizontal punch are respectively connected to the left horizontal cylinder and the right horizontal cylinder of the second press; S2, heating the blank and the first-fire forging die; S3, One Fire Forging The blank is placed on a lower-fire top block in a lower-fire die core, and is pressed downward by an upper-fire punch to form a fire forging; S4, the upper punch returns to the first fire, and the lower ejector assembly ejects the first fire forging out of the lower die core; S5, heating of the second-fire die forging die; S6, one-fire forging heating The left lower die core and the right lower die core are placed on a fire forging, the cavities of the left lower die core and the right lower die core are fitted with the lower flange of the fire forging, and they are heated together to the initial forging temperature and kept warm; S7, the second fire lower ejector pushes the second fire lower ejector block out of the upper end surface of the die base, and the first fire forging, the left lower die core and the right lower die core are placed on the second fire lower ejector block, the second fire lower ejector rod and the second fire lower ejector block return to their original positions, and the first fire forging, the left lower die core and the right lower die core fall into the bottom of the die base die cavity; S8, the left horizontal punch and the right horizontal punch are pushed out to their proper positions; S9, the left upper die core and the right upper die core are placed in the die base, the left upper die core and the right upper die core are in contact with the upper end surfaces of the left horizontal punch and the right horizontal punch respectively, the T-shaped pressure ring moves down to the position and applies pressure, after the pressure is maintained, the left horizontal punch and the right horizontal punch apply pressure in the horizontal direction and maintain the pressure, the second fire upper punch moves down to press and move into position, and the final forging is formed; S10, demoulding The pressure in all directions is unloaded, the left horizontal punch and the right horizontal punch return to exit the die base, the second fire upper punch and the T-shaped pressure ring return upward, the second fire lower ejector rod is ejected upward, and the second fire lower ejector block, the final forging, the left lower die core, the right lower die core, the left upper die core and the right upper die core are ejected from the die base, the left upper die core and the right upper die core move horizontally opposite to each other to demold the final forging, the left lower die core and the right lower die core move upward first and then move horizontally opposite to each other to demold the final forging, and finally the demolding of the final forging is completed.

Images