Plate forging forming method

Abstract

The invention relates to the field of metal plastic forming, in particular to a plate forging forming method. The method comprises the following steps: forging a round plate blank into a cylindrical part with a flange; the cylindrical part with the flange is forged, so that an annular tooth cavity with different thicknesses of the plate forging forming device is filled with materials of a first cylinder wall area and a first flange area, and a tooth plate forge piece with different thicknesses is obtained; forging the unequal-thickness toothed plate forge piece into a cylinder wall thickened plate forge piece; and the cylinder wall thickened plate forge piece is forged, so that a plurality of circles of V-shaped tooth cavities and annular protruding cavities of the plate forging forming device are filled with materials of a third cylinder wall area, and a plate forging forming part is obtained. By adopting the method, the risk of material buckling can be reduced, the product quality is improved, and the process period of the product is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of metal plastic forming, and particularly to a plate forging forming method. Background Art

[0002] The metal raw material to be forged can be forged into a thin-walled rotary body structure with unequal wall thickness. For example, through forging the metal material, parts such as an automotive shock absorber signal disk can be obtained. The automotive shock absorber signal disk is mainly used for the functions of transmitting and measuring the crankshaft position and speed signals in the automotive engine system. The shock absorber signal disk parts absorb and attenuate the vibration generated by the high-speed operation of the engine crankshaft, ensuring smoother operation of the engine.

[0003] The flange area of the thin-walled rotary body structure has uniformly distributed "unequal thickness teeth" features, the barrel wall area has annular "V-shaped teeth" features, and the barrel bottom area is a thin-walled structure. The existing technology for manufacturing the thin-walled rotary body structure mainly adopts an integral forming process, which requires more than 10 processes such as steel die drawing, spinning, trimming, and sizing. The number of sets of forming die equipment is numerous. Not only is the process design difficult, the production cost high, and the processing cycle long, but the spinning process is not easy to control the folding defects, resulting in poor surface quality and service performance of the thin-walled rotary body structure. Summary of the Invention

[0004] In order to solve the deficiencies of the existing technology, the present invention proposes a plate forging forming method that can improve quality.

[0005] A plate forging forming method, applied to a plate forging forming device, the method comprising: Forging a circular plate blank into a flanged cylindrical part; the circular plate blank is the metal raw material to be forged; the flanged cylindrical part includes a first barrel bottom area, a first barrel wall area, and a first flange area; the first barrel bottom area is parallel to the first flange area; the first barrel bottom area and the first flange area are respectively connected to both ends of the first barrel wall area; there is a fillet transition between the first barrel bottom area and the first barrel wall area; Forging the flanged cylindrical part so that the materials of the first barrel wall area and the first flange area fill the annular unequal thickness tooth cavity of the plate forging forming device to obtain an unequal thickness tooth plate forging; the unequal thickness tooth plate forging includes a second barrel bottom area, a second barrel wall area, and a second flange area; the second barrel bottom area is parallel to the second flange area; the second barrel bottom area and the second flange area are respectively connected to both ends of the second barrel wall area; the outer edge of the second flange area is in the shape of annular unequal thickness teeth; the height of the second barrel wall area is less than the height of the first barrel wall area; there is a fillet transition between the second barrel bottom area and the second barrel wall area; Forging the unequal-thickness tooth plate forging into a thickened cylinder wall plate forging; the thickened cylinder wall plate forging includes a third cylinder bottom area, a third cylinder wall area and a third flange area, the height of the third cylinder wall area is less than the height of the second cylinder wall area; the third cylinder bottom area is parallel to the third flange area; the third cylinder bottom area and the third flange area are respectively connected to two ends of the third cylinder wall area; the outer edge of the third flange area is in the shape of an annular unequal-thickness tooth; a fillet transition is provided between the third cylinder bottom area and the third cylinder wall area; Forging the thickened cylinder wall plate forging so that the material of the third cylinder wall area fills several turns of V-shaped tooth cavities and annular convex cavities of the plate forging forming device, to obtain a plate forging forming part; the plate forging forming part includes a fourth cylinder bottom area, a fourth cylinder wall area and a fourth flange area; the fourth cylinder bottom area is parallel to the fourth flange area; the fourth cylinder bottom area and the fourth flange area are respectively connected to two ends of the fourth cylinder wall area; the outer edge of the fourth flange area is in the shape of an annular unequal-thickness tooth; a fillet transition is provided between the fourth cylinder bottom area and the fourth cylinder wall area; the height of the fourth cylinder wall area is lower than the height of the third cylinder wall area; the outer wall of the fourth cylinder wall area has several turns of V-shaped teeth, and the several turns of V-shaped teeth are arranged at intervals along the axial direction of the plate forging forming part; the outer wall at the connection of the fourth cylinder wall area and the fourth cylinder bottom area is in the shape of an annular convexity.

[0006] In the above-mentioned plate forging forming method, on the one hand, by pre-forging a circular plate blank into a flanged cylindrical part with a flange, and forging the flanged cylindrical part, the materials of the first cylinder wall area and the first flange area fill the annular unequal-thickness tooth cavity of the plate forging forming device. During this process, the materials will not curl, and an unequal-thickness tooth structure is directly formed to obtain an unequal-thickness tooth plate forging, which solves the problem of folding defects caused by outer diameter curling and then spinning in the prior art, and greatly improves the product quality. On the other hand, by forging the unequal-thickness tooth plate forging into a thickened cylinder wall plate forging, the thickened cylinder wall plate forging can be thickened and formed only once, reducing the risk of material buckling and folding in the third cylinder wall area. Then, forging the thickened cylinder wall plate forging so that the material of the third cylinder wall area fills several turns of V-shaped tooth cavities and annular convex cavities of the plate forging forming device to obtain a plate forging forming part, which makes the process debugging cycle short, the finished part has high strength and good dimensional accuracy. Description of the Drawings

[0007] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0008] Figure 13D schematic diagram of a plate forging part in an embodiment; Figure 2 Stereoscopic sectional view of a plate forging part in an embodiment; Figure 3 Schematic diagram of a circular plate blank in an embodiment; Figure 4 Stereoscopic sectional view of a flanged cylindrical part in an embodiment; Figure 5 Stereoscopic sectional view of a non-uniform thickness toothed plate forging in an embodiment; Figure 6 Stereoscopic sectional view of a thickened barrel wall plate forging in an embodiment; Figure 7 Stereoscopic sectional view of a plate forging part in another embodiment; Figure 8 Schematic diagram of a preforming die for a flanged cylindrical part in an embodiment; Figure 9 Schematic diagram of the forming process of a flanged cylindrical part in an embodiment; Figure 10 For Figure 9 Enlarged schematic diagram at A in; Figure 11 Schematic diagram of a non-uniform thickness toothed final forming plate forging die in an embodiment; Figure 12 Schematic diagram of the forming process of a non-uniform thickness toothed plate forging in an embodiment; Figure 13 For Figure 11 Enlarged schematic diagram at B in; Figure 14 Stereoscopic sectional view of a first pressure plate in an embodiment; Figure 15 Stereoscopic sectional view of a first female die in an embodiment; Figure 16 Stereoscopic sectional view of a first lower punch in an embodiment; Figure 17 Schematic diagram of a thickened barrel wall preforming plate forging die in an embodiment; Figure 18 Schematic diagram of the forming process of a thickened barrel wall plate forging in an embodiment; Figure 19 Stereoscopic sectional view of a second pressure plate in an embodiment; Figure 20 Stereoscopic sectional view of a second female die in an embodiment; Figure 21 Stereoscopic sectional view of a second lower punch in an embodiment; Figure 22 For Figure 17Enlarged schematic view at position C; Figure 23 Schematic diagram of the forging die for the final forming plate of the V-shaped teeth on the barrel wall in an embodiment; Figure 24 Schematic diagram of the forming process of the plate forging part in an embodiment; Figure 25 Stereoscopic cross-sectional view of the third pressure plate in an embodiment; Figure 26 Stereoscopic cross-sectional view of the third female die in an embodiment; Figure 27 Stereoscopic cross-sectional view of the third lower punch in an embodiment.

[0009] Reference numerals in the attached drawings: 1. Pre-forming die for the flanged cylindrical part; 2. Forging die for the final forming plate of the unequal-thickness tooth type; 3. Forging die for the pre-forming plate with increased barrel wall thickness; 4. Forging die for the final forming plate of the V-shaped teeth on the barrel wall; 11. Drawing punch; 12. Blank holder; 13. Drawing die; 14. First upper cylinder of the first press; 15. Second upper cylinder of the first press; 21. First upper punch; 22. First pressure plate; 221. Step surface of the first pressure plate; 222. Outer tooth surface of the first pressure plate; 223. Bottom surface of the first pressure plate; 224. Fillet of the first pressure plate; 225. Inner surface of the first pressure plate; 23. First female die; 231. Upper top surface of the first female die; 232. Inner tooth surface of the first female die; 233. Step surface of the first female die; 234. Inner surface of the first female die; 24. First lower punch; 241. Fillet of the first lower punch; 242. Step surface of the first lower punch; 243. Outer surface of the first lower punch; 25. First upper cylinder of the second press; 26. Second upper cylinder of the second press; 27. Lower cylinder of the second press; 31. Second upper punch; 32. Second pressure plate; 321. Step surface of the second pressure plate; 322. Outer tooth surface of the second pressure plate; 323. Bottom surface of the second pressure plate; 324. Fillet of the second pressure plate; 325. Inner surface of the second pressure plate; 33. Second female die; 331. Upper top surface of the second female die; 332. Inner tooth surface of the second female die; 333. Step surface of the second female die; 334. Inner surface of the second female die; 34. Second lower punch; 341. Fillet of the second lower punch; 342. Step surface of the second lower punch; 343. Outer surface of the second lower punch; 35. First upper cylinder of the third press; 36. Second upper cylinder of the third press; 37. Lower cylinder of the third press; 41. Third upper punch; 42. Third pressure plate; 421. Third pressure plate step surface; 422. Third pressure plate external tooth surface; 423. Third pressure plate bottom surface; 424. Third pressure plate fillet; 425. Third pressure plate inner surface; 43. Third female die; 431. Third female die upper top surface; 432. Third female die inner tooth surface; 433. Third female die step surface; 434. Third female die inner surface; 4341. Third female die V-shaped surface; 4342. Third female die inner cylindrical surface; 44. Third lower punch; 441. Third lower punch step surface; 442. Third lower punch fillet; 443. Third lower punch outer surface; 45. Fourth press first upper cylinder; 46. Fourth press second upper cylinder; 47. Fourth press lower cylinder; 51. Circular plate blank; 52. Flanged cylindrical part; 53. Unequal-thickness toothed plate forging; 54. Thickened barrel wall plate forging; 55. Plate forging forming part; A. First gap; B. Annular unequal-thickness tooth cavity; C. Second gap. Detailed implementation manners

[0010] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0011] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "outer circumference", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0012] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0013] In this application, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0014] In this application, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0015] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0016] In order to more clearly understand the above objects, features and advantages of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0017] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0018] Figure 1 Shown is a three-dimensional view of the plate forging part 55. The plate forging part 55 is integrally a cylindrical shape with a flange. The fourth flange area 553 has uniformly distributed annular teeth with unequal thickness. The fourth cylindrical wall area 552 has several circles of V-shaped teeth and annular protrusions. The fourth cylindrical bottom area 551 has a stepped surface with a fillet transition.

[0019] Figure 2 Shown is a three-dimensional sectional view of the plate forging part 55.

[0020] The following is Figure 1 A specific embodiment of the plate forging method of the plate forging part 55 shown in [reference]. The plate forging method of the present invention is preferably a cold forming process, and can also be a hot forming process: S1. Forge the circular plate blank 51 into a flanged cylindrical part 52.

[0021] Among them, the circular plate blank 51 is the metal raw material to be forged, preferably a metal raw material with a yield strength not greater than 200 MPa, such as: aluminum alloy or low-carbon steel material; the flanged cylindrical part 52 includes a first bottom area 521, a first wall area 522 and a first flange area 523; the first bottom area 521 is parallel to the first flange area 523; the first bottom area 521 and the first flange area 523 are respectively connected to both ends of the first wall area 522; there is a fillet transition between the first bottom area 521 and the first wall area 522. The circular plate blank 51 is as Figure 3 shown, and the three-dimensional sectional view of the flanged cylindrical part 52 is as Figure 4 shown.

[0022] S2. Forge the flanged cylindrical part 52 so that the materials of the first wall area 522 and the first flange area 523 fill the annular non-uniform thickness tooth cavity of the plate forging device, and obtain a non-uniform thickness tooth plate forging 53.

[0023] Among them, the non-uniform thickness tooth plate forging 53 includes a second bottom area 531, a second wall area 532 and a second flange area 533; the second bottom area 531 is parallel to the second flange area 533; the second bottom area 531 and the second flange area 533 are respectively connected to both ends of the second wall area 532; the outer edge of the second flange area 533 is in the shape of an annular non-uniform thickness tooth; the height of the second wall area 532 is less than the height of the first wall area 522; there is a fillet transition between the second bottom area 531 and the second wall area 532. The three-dimensional sectional view of the non-uniform thickness tooth plate forging 53 is as Figure 5 shown.

[0024] S3. Forge the non-uniform thickness tooth plate forging 53 into a thickened wall plate forging 54.

[0025] Among them, the thickened wall plate forging 54 includes a third bottom area 541, a third wall area 542 and a third flange area 543. The height of the third wall area 542 is less than the height of the second wall area 532; the third bottom area 541 is parallel to the third flange area 543; the third bottom area 541 and the third flange area 543 are respectively connected to both ends of the third wall area 542; the outer edge of the third flange area 543 is in the shape of an annular non-uniform thickness tooth; there is a fillet transition between the third bottom area 541 and the third wall area 542. The three-dimensional sectional view of the thickened wall plate forging 54 is asFigure 6 as shown

[0026] S4. Forge the thickened plate forging 54 of the cylinder wall so that the material in the third cylinder wall area 542 fills several turns of V-shaped tooth cavities and annular convex cavities of the plate forging forming device, obtaining a plate forging forming part 55.

[0027] Among them, the plate forging forming part 55 is a thin-walled rotating body structure with unequal wall thicknesses. The plate forging forming part 55 includes a fourth cylinder bottom area 551, a fourth cylinder wall area 552, and a fourth flange area 553; the fourth cylinder bottom area 551 is parallel to the fourth flange area 553; the fourth cylinder bottom area 551 and the fourth flange area 553 are respectively connected to both ends of the fourth cylinder wall area 552; the outer edge of the fourth flange area 553 is an annular unequal-thickness tooth shape; there is a fillet transition between the fourth cylinder bottom area 551 and the fourth cylinder wall area 552; the height of the fourth cylinder wall area 552 is lower than the height of the third cylinder wall area 542; the outer wall of the fourth cylinder wall area 552 has several turns of V-shaped teeth, and the several turns of V-shaped teeth are arranged at intervals along the axial direction of the plate forging forming part 55; the outer wall at the connection between the fourth cylinder wall area 552 and the fourth cylinder bottom area 551 is in an annular convex shape. The three-dimensional cross-sectional view of the plate forging forming part 55 is as Figure 7 shown

[0028] In some embodiments, the fourth cylinder bottom area 551 of the plate forging forming part 55 is not limited to a stepped shape. The fourth cylinder bottom area 551 can be a flat bottom shape, and the shapes of the cylinder bottom areas in each pass stage are not limited to be exactly the same.

[0029] In one embodiment, the plate forging forming device includes a preforming die 1 for a flanged cylindrical part. The preforming die 1 for a flanged cylindrical part includes a drawing punch 11, a blank holder 12, a drawing die 13, a first upper cylinder 14 of a first press, and a second upper cylinder 15 of a first press; the drawing punch 11 is connected to the second upper cylinder 15 of the first press, and the blank holder 12 is connected to the first upper cylinder 14 of the first press; the drawing die 13 is a cylinder with a concave pit in the middle; the drawing punch 11 is a cylinder that is allowed to move up and down in the concave pit of the drawing die 13, and the blank holder 12 is located at the outer edge of the top of the drawing die 13. Forging the circular plate blank 51 into a flanged cylindrical part 52 includes: placing the circular plate blank 51 with uniform thickness in the center on the flange plane of the drawing die 13, and controlling the first upper cylinder 14 of the first press to apply a blank holding force to the blank holder 12 to press the outer edge of the circular plate blank 51 on the flange plane of the drawing die 13; controlling the second upper cylinder 15 of the first press to push the drawing punch 11 downward to pull the circular plate blank 51 into the first cavity, obtaining a flanged cylindrical part 52 with uniform wall thickness; the first cavity is surrounded by the drawing punch 11, the blank holder 12, and the drawing die 13.

[0030] Among them, the side surface of the drawing punch 11 is a cylindrical surface, the diameter of the side surface is the inner diameter of the inner cylindrical surface in the fourth barrel wall area 552, the bottom surface of the drawing punch 11 has a stepped arc-transitioned step, and there is a fillet transition between the bottom surface and the side surface of the drawing punch 11; the drawing die 13 is a cylinder with a cylindrical pit in the center, the bottom surface of the pit of the drawing die 13 has a stepped arc-transitioned step, and there is a fillet transition between the bottom surface of the pit and the side surface of the pit of the drawing die 13. Figure 8 The preforming die 1 for a flanged cylindrical part is shown. Figure 9 The schematic diagram of the forming process of the flanged cylindrical part is shown.

[0031] In this embodiment, the drawing die 13 is fixedly installed on the lower support platform of the first press. During the preforming process of the flanged cylindrical part 52, first, the circular blank 51 is placed on the flange plane of the drawing die 13, and the center of the circular blank 51 is coaxially placed with the drawing die 13; when closing the die, the blank holder 12 is driven to descend by the first upper cylinder 14 of the first press. When the outer edge of the circular blank 51 is pressed tightly on the flange plane of the drawing die 13 and a certain pressing force is applied, the first upper cylinder 14 of the first press stops descending; subsequently, the second upper cylinder 15 of the first press drives the drawing punch 11 to descend and generates a drawing force. Under the action of the drawing force, the circular blank 51 slowly fills into the first cavity. The second upper cylinder 15 of the first press stops descending and holds the pressure for a certain period of time, and the flanged cylindrical part 52 is obtained.

[0032] In one embodiment, the drawing punch 11 and the drawing die 13 are coaxial. Controlling the second upper cylinder 15 of the first press to push the drawing punch 11 to descend includes: controlling the second upper cylinder 15 of the first press to push the drawing punch 11 to descend until the thickness of the first gap A between the drawing punch 11 and the drawing die 13 is the target value; the target value is equal to the first multiple of the thickness of the circular blank 51; controlling the second upper cylinder 15 of the first press to stop descending and hold the pressure for the first preset time.

[0033] Among them, when closing the die, a Figure 9 first gap A at A is formed between the drawing punch 11 and the drawing die 13. The first gap A is as Figure 10 shown. The thickness of the first gap A is the target value; the target value is the first multiple of the thickness of the circular blank 51. For example, the first gap A is 1.2 times the thickness of the circular blank 51.

[0034] Furthermore, the second upper cylinder 15 of the first press drives the drawing punch 11 to descend and generates a drawing force. Under the action of the drawing force, the circular blank 51 slowly fills into the cavity of the first gap A. When the drawing punch 11 descends to a distance of the first gap A from the drawing die 13, the second upper cylinder 15 of the first press stops descending and holds the pressure for a certain period of time. Finally, the flanged cylindrical part 52 is obtained.

[0035] In one embodiment, the plate forging forming device includes a final forming die 2 for an unequal-thickness toothed plate, Figure 11 The final forming die 2 for an unequal-thickness toothed plate is shown. The final forming die 2 for an unequal-thickness toothed plate includes a first upper punch 21, a first pressing plate 22, a first female die 23, a first lower punch 24, a first upper cylinder 25 of a second press, a second upper cylinder 26 of the second press, and a lower cylinder 27 of the second press; the first upper punch 21 is connected to the second upper cylinder 26 of the second press, the first pressing plate 22 is connected to the first upper cylinder 25 of the second press, and the first lower punch 24 is connected to the lower cylinder 27 of the second press; the middle of the first female die 23 is a concave pit, and the top is a stepped transition step; the bottom of the concave pit of the first female die 23 is the first lower punch 24 that is allowed to move up and down, and the outer wall of the first lower punch 24 is in sliding fit with the inner wall of the first female die 23; the first upper punch 21 is a cylinder that is allowed to move up and down in the concave pit of the first female die 23, and the first pressing plate 22 is in clearance fit with the step of the first female die 23; the outer edges of the first pressing plate 22, the first female die 23, and the first flange area 523 enclose an annular unequal-thickness tooth cavity.

[0036] Forging the flanged cylindrical part 52 so that the materials of the first cylindrical wall area 522 and the first flange area 523 fill the annular unequal-thickness tooth cavity of the plate forging forming device to obtain an unequal-thickness toothed plate forging 53, including: placing the flanged cylindrical part 52 in the cavity of the first female die 23, and controlling the first upper cylinder 25 of the second press to push the first pressing plate 22 downward to press the first flange area 523 against the stepped flange plane of the first female die 23; controlling the lower cylinder 27 of the second press to push the first lower punch 24, the first upper punch 21, and the first bottom area 521 of the cylinder upward. At the same time, controlling the second upper cylinder 26 of the second press to apply a load downward to the first upper punch 21 so that the first bottom area 521 of the cylinder is clamped; when the first bottom area 521 of the cylinder is clamped, controlling the lower cylinder 27 of the second press to continue to move upward, the first lower punch 24, the first upper punch 21, and the first bottom area 521 of the cylinder continue to move upward, and the first cylindrical wall area 522 and the first flange area 523 are jointly extruded by the first lower punch 24, the first upper punch 21, the first female die 23, and the first pressing plate 22 and undergo plastic deformation. The height of the first cylindrical wall area 522 becomes smaller, and the materials of the first cylindrical wall area 522 and the first flange area 523 fill the annular unequal-thickness tooth cavity to obtain an unequal-thickness toothed plate forging 53.

[0037] Among them, the first female die 23 is fixedly installed on the lower support platform of the second press. Figure 12 The schematic diagram of the process of forming an unequal-thickness toothed plate forging is shown.

[0038] During the mold clamping process, the flanged cylindrical part 52 is placed in the cavity of the first female die 23. The first upper cylinder 25 of the second press pushes the first pressure plate 22 to press the first flange area 523 tightly against the stepped flange plane of the first female die 23. The lower cylinder 27 of the second press pushes the first lower punch 24 upward. At the same time, the second upper cylinder 26 of the second press pushes the first upper punch 21 downward to clamp the first bottom area of the cylinder, thus completing the mold clamping. After the mold clamping, the first pressure plate 22 and the first female die 23 will form an annular non-uniform thickness tooth cavity as shown at B in Figure 11 . The enlarged schematic diagram of B is as shown in Figure 13 . A first gap A as shown at A in Figure 9 will also be formed between the first female die 23 and the first upper punch 21. During the final forming process of the annular non-uniform thickness teeth in the first flange area 523, the lower cylinder 27 of the second press pushes the first lower punch 24 upward and drives the first upper punch 21 and the first bottom area 521 of the cylinder to move upward together. During the process of the lower cylinder 27 of the second press pushing the first lower punch 24 upward, the second upper cylinder 26 of the second press still applies a certain load downward to the first upper punch 21 so that the first bottom area 521 of the cylinder is clamped. As the lower cylinder 27 of the second press continues to move upward, the first lower punch 24, the first upper punch 21, and the first bottom area 521 of the cylinder continue to move upward. The first cylinder wall area 522 and the first flange area 523 are jointly extruded by the first lower punch 24, the first upper punch 21, the first female die 23, and the first pressure plate 22 and undergo plastic deformation. The materials of the first cylinder wall area 522 and the first flange area 523 are slowly pushed into the annular non-uniform thickness tooth cavity. The height of the first cylinder wall area 522 continuously decreases, and the annular non-uniform thickness teeth of the first flange area 523 are slowly formed. When the annular non-uniform thickness tooth cavity is completely filled, the second upper cylinder 26 and the lower cylinder 27 of the second press stop moving upward and hold the pressure for a certain period of time to obtain a non-uniform thickness tooth plate forging 53.

[0039] In one embodiment, the first pressure plate 22 is as shown in Figure 14 . The first pressure plate 22 includes a first pressure plate step surface 221, a first pressure plate outer tooth surface 222, a first pressure plate bottom surface 223, a first pressure plate fillet 224, and a first pressure plate inner surface 225. The first pressure plate step surface 221 is perpendicularly connected to the first pressure plate outer tooth surface 222. The number and shape of the non-uniform thickness teeth on the first pressure plate outer tooth surface 222 are the same as those of the non-uniform thickness teeth on the outer edge of the second flange area 533. The first pressure plate bottom surface 223 is perpendicularly connected to the first pressure plate outer tooth surface 222. The first pressure plate inner surface 225 is perpendicular to the first pressure plate bottom surface 223. The transition between the first pressure plate bottom surface 223 and the first pressure plate inner surface 225 is the first pressure plate fillet 224. The first pressure plate fillet 224 is a convex fillet outward. The lower tooth surface of the first pressure plate outer tooth surface 222 has a concave step. The first pressure plate inner surface 225 is a cylindrical surface. The shape of the first pressure plate fillet 224 is the same as that of the fillet between the first flange area 523 and the first cylinder wall area 522.

[0040] In one embodiment, the first female die 23 is as Figure 15 shown. The first female die 23 includes a first upper top surface 231 of the female die, a first inner tooth surface 232 of the female die, a first stepped surface 233 of the female die, and a first inner surface 234 of the female die. Both ends of the first stepped surface 233 of the female die are respectively connected to the first upper top surface 231 of the female die and the first inner tooth surface 232 of the female die. The connection part between the first stepped surface 233 of the female die and the first inner tooth surface 232 of the female die is a toothed plane with pits. The first inner surface 234 of the female die is a cylindrical surface, and the connection between the first inner surface 234 of the female die and the first stepped surface 233 of the female die is connected through a fillet transition. There is a clearance fit between the outer tooth surface 222 of the first pressing plate and the inner tooth surface 232 of the first female die. The inner circle diameter of the first inner surface 234 of the female die is smaller than the inner circle diameter of the first upper top surface 231 of the female die. The first upper top surface 231 of the female die is annular, and the first upper top surface 231 of the female die is perpendicularly connected to the first inner tooth surface 232 of the female die. There is a small clearance engagement between the first inner tooth surface 232 of the female die and the outer tooth surface 222 of the first pressing plate, and the first pressing plate 22 can slide up and down along the first inner tooth surface 232 of the female die. The first stepped surface 233 of the female die is perpendicularly connected to the first inner tooth surface 232 of the female die, and the position of the vertical corner is a toothed plane with pits. The first inner surface 234 of the female die is perpendicular to the first stepped surface 233 of the female die, and the corner is a fillet transition.

[0041] In one embodiment, the first lower punch 24 is as Figure 16 shown. The first lower punch 24 includes a first rounded corner 241 of the lower punch, a first stepped surface 242 of the lower punch, and a first outer surface 243 of the lower punch. The first rounded corner 241 of the lower punch is an upwardly convex annular arc-shaped structure, and the shape of the first rounded corner 241 of the lower punch is the same as the rounded corner shape on the outer side of the first bottom region 521. The first stepped surface 242 of the lower punch is composed of two parallel planes, and there is an arc transition between the two parallel planes. The first outer surface 243 of the lower punch is a cylindrical surface, and the first outer surface 243 of the lower punch is perpendicular to the first stepped surface 242 of the lower punch. The shape of the first rounded corner 241 of the lower punch is the same as the outer rounded corner shape connecting the first bottom region 521 and the first barrel wall region 522.

[0042] In some embodiments, during the mold closing process, the first upper cylinder 25 of the second press pushes the first pressing plate 22 to press the first flange region 523 against the first stepped surface 233 of the first female die, and the lower cylinder 27 of the second press pushes the first lower punch 24 upward. At the same time, the second upper cylinder 26 of the second press pushes the first upper punch 21 downward to clamp the first bottom region 521, thus completing the mold closing.

[0043] In some embodiments, the plate forging forming device includes a preforming die 3 for thickening the barrel wall, and the preforming die 3 for thickening the barrel wall is as Figure 17。The forging die 3 for the preformed plate with thickened barrel wall includes a second upper punch 31, a second pressure plate 32, a second female die 33, a second lower punch 34, a first upper cylinder 35 of a third press, a second upper cylinder 36 of a third press, and a lower cylinder 37 of a third press; the second upper punch 31 is connected to the second upper cylinder 36 of the third press, the second pressure plate 32 is connected to the first upper cylinder 35 of the third press, and the second lower punch 34 is connected to the lower cylinder 37 of the third press; there is a concave pit in the middle of the second female die 33, and the top is a stepped transition step; the bottom of the concave pit of the second female die 33 is the second lower punch 34 that is allowed to move up and down, and the outer wall of the second lower punch 34 is in sliding fit with the inner wall of the second female die 33; the second upper punch 31 is a cylinder that is allowed to move up and down in the concave pit of the second female die 33, and there is a clearance fit between the second pressure plate 32 and the step of the second female die 33; an annular cavity with unequal thickness teeth is formed by enclosing the outer edges of the second pressure plate 32, the second female die 33, and the second flange area 533.

[0044] Forging the unequal-thickness toothed plate forging 53 into a thickened barrel wall plate forging 54 includes: placing the unequal-thickness toothed plate forging 53 in the cavity of the second female die 33, and controlling the first upper cylinder 35 of the third press to push the second pressure plate 32 downward to press the second flange area 533 against the stepped flange plane of the second female die 33; controlling the lower cylinder 37 of the third press to push the second lower punch 34, the second upper punch 31, and the second barrel bottom area 531 upward, and at the same time controlling the second upper cylinder 36 of the third press to apply a load downward to the second upper punch 31, so that the second barrel bottom area 531 is clamped, and the material of the second barrel wall area 532 fills the second cavity to obtain the thickened barrel wall plate forging 54; the second cavity is formed by enclosing the second female die 33 and the unequal-thickness toothed plate forging 53, and the thickness of the third barrel wall area 542 is greater than the thickness of the second barrel wall area 532. The process of forming the thickened barrel wall plate forging is as Figure 18 shown.

[0045] In one embodiment, the second upper punch 31 is coaxial with both the second female die 33 and the second lower punch 34. The second pressure plate 32 is as Figure 19 shown. The second pressure plate 32 includes a second pressure plate step surface 321, a second pressure plate outer toothed surface 322, a second pressure plate bottom surface 323, a second pressure plate fillet 324, and a second pressure plate inner surface 325; the second pressure plate step surface 321 is perpendicularly connected to the second pressure plate outer toothed surface 322; the number and shape of the unequal-thickness teeth on the second pressure plate outer toothed surface 322 are the same as the number and shape of the unequal-thickness teeth on the outer edge of the second flange area 533; the second pressure plate bottom surface 323 is perpendicularly connected to the second pressure plate outer toothed surface 322; the second pressure plate inner surface 325 is perpendicular to the second pressure plate bottom surface 323; the transition between the second pressure plate bottom surface 323 and the second pressure plate inner surface 325 is the second pressure plate fillet 324; the second pressure plate fillet 324 is a convex fillet.

[0046] In one embodiment, the second female die 33 is as Figure 20As shown in the figure, the second female die 33 includes a second female die upper top surface 331, a second female die inner tooth surface 332, a second female die step surface 333, and a second female die inner surface 334; the shape and size of the second female die upper top surface 331 are the same as those of the first female die upper top surface 231; the shape and size of the second female die inner tooth surface 332 are the same as those of the first female die inner tooth surface 232; the outer shape of the second female die step surface 333 is the same as that of the first female die step surface 233, and the inner circle diameter of the second female die step surface 333 is greater than the inner circle diameter of the first female die step surface 233; the inner circle diameter of the second female die inner surface 334 is smaller than the inner circle diameter of the second female die upper top surface 331; the second female die step surface 333 is perpendicular to the second female die inner tooth surface 332, and the connection between the second female die step surface 333 and the second female die inner tooth surface 332 is a toothed plane with pits; the second female die inner surface 334 is a cylindrical surface, and the second female die inner surface 334 and the second female die step surface 333 are connected by a fillet transition; there is a clearance fit between the second pressure plate outer tooth surface 322 and the second female die inner tooth surface 332.

[0047] In one embodiment, the second lower punch 34 is as Figure 21 shown. The second lower punch 34 includes a second lower punch fillet 341, a second lower punch step surface 342, and a second lower punch outer surface 343; the second lower punch fillet 341 is an upwardly convex annular arc-shaped structure; the second lower punch step surface 342 is similar in shape to the first lower punch step surface 242, and the circular diameter of the outer edge of the second lower punch step surface 342 is greater than the circular diameter of the outer edge of the first lower punch step surface 242; there is a clearance fit between the second lower punch outer surface 343 and the second female die inner surface 334; the second lower punch step surface 342 is composed of two parallel planes, and there is an arc transition between the two parallel planes; the second lower punch outer surface 343 is a cylindrical surface, and the second lower punch outer surface 343 is perpendicular to the second lower punch step surface 342.

[0048] In one embodiment, the second female die 33 is fixedly installed on the lower support platform of the third press. During mold closing, the first upper cylinder 35 of the third press pushes the second pressure plate 32 to press the second flange area 533 against the second female die step surface 333, and the second upper cylinder 36 of the third press pushes the second upper punch 31 downward. At the same time, the lower cylinder 37 of the third press pushes the second lower punch 34 upward to clamp the second bottom area 531, thus completing mold closing. After mold closing, the second female die 33 and the second upper punch 31 form Figure 17 the second gap C at C in the figure, and the enlarged schematic diagram of the second gap C is as Figure 22 shown. The second gap C should be greater than Figure 10The first gap A therein. After the die is closed, the non-uniform thickness toothed plate forging 53 closely adheres to the side wall of the second upper punch 31 and forms a second cavity with the second female die 33. In the preforming stage of the barrel wall thickening, the lower cylinder 37 of the third press pushes the second lower punch 34 upward, driving the second upper punch 31 and the second barrel bottom area 531 upward together. The second upper cylinder 36 of the third press still applies a certain load downward to the second upper punch 31. As the lower cylinder 37 of the third press continues to move upward, the second lower punch 34, the second upper punch 31, and the second barrel bottom area 531 continue to move upward. The second barrel wall area 532 is jointly extruded by the second upper punch 31, the second lower punch 34, the second female die 33, and the second pressing plate 32 and undergoes plastic deformation. The material of the second barrel wall area 532 slowly fills the second cavity, and the height of the second barrel wall area 532 continuously decreases. When the second cavity is completely filled with material, the second upper cylinder 36 and the lower cylinder 37 of the third press stop moving and hold the pressure for a certain period of time to obtain the barrel wall thickened plate forging 54.

[0049] In one embodiment, the plate forging forming device includes a barrel wall V-shaped tooth final forming plate forging die 4, and the barrel wall V-shaped tooth final forming plate forging die 4 is as Figure 23 shown, and the process of forming the plate forging forming part is as Figure 24 shown. The barrel wall V-shaped tooth final forming plate forging die 4 includes a third upper punch 41, a third pressing plate 42, a third female die 43, a third lower punch 44, a first upper cylinder 45 of the fourth press, a second upper cylinder 46 of the fourth press, and a lower cylinder 47 of the fourth press; the third upper punch 41 is connected to the second upper cylinder 46 of the fourth press, the third pressing plate 42 is connected to the first upper cylinder 45 of the fourth press, and the third lower punch 44 is connected to the lower cylinder 47 of the fourth press; the middle of the third female die 43 is a concave pit, and the top is a stepped transition step; the bottom of the concave pit of the third female die 43 is the third lower punch 44 that allows up and down movement, and the outer wall of the third lower punch 44 is in sliding fit with the inner wall of the third female die 43; the third upper punch 41 is a cylinder that allows up and down movement in the concave pit of the third female die 43, and the third pressing plate 42 is in clearance fit with the step of the third female die 43; the outer edges of the third pressing plate 42, the third female die 43, and the third flange area 543 enclose an annular non-uniform thickness tooth cavity; the inner wall of the third female die 43 has several circles of V-shaped tooth cavities and annular raised cavities, and several circles of V-shaped tooth cavities are arranged at intervals along the axial direction of the inner wall of the third female die 43; the annular raised cavity is arranged along the bottom of the inner wall of the third female die 43.

[0050] Forging the thickened barrel wall plate forging 54 so that the material in the third barrel wall area 542 fills several turns of V-shaped tooth cavities and annular convex cavities of the plate forging forming device to obtain the plate forging forming part 55, including: placing the thickened barrel wall plate forging 54 in the cavity of the third female die 43, and controlling the first upper cylinder 45 of the fourth press to push the third pressing plate 42 downward to press the third flange area 543 against the stepped flange plane of the third female die 43; controlling the lower cylinder 47 of the fourth press to push the third lower punch 44, the third upper punch 41, and the third barrel bottom area 541 upward. At the same time, controlling the second upper cylinder 46 of the fourth press to apply a load downward to the third upper punch 41 so that the third barrel bottom area 541 is clamped, and the material in the third barrel wall area 542 fills several turns of V-shaped tooth cavities and annular convex cavities to obtain the plate forging forming part 55; several turns of V-shaped tooth cavities and annular convex cavities are surrounded by the third female die 43 and the third barrel wall area 542.

[0051] In one embodiment, as Figure 25 shown, the third pressing plate 42 includes a third pressing plate step surface 421, a third pressing plate outer tooth surface 422, a third pressing plate bottom surface 423, a third pressing plate fillet 424, and a third pressing plate inner surface 425; the third pressing plate step surface 421 is perpendicularly connected to the third pressing plate outer tooth surface 422; the number and shape of the unequal-thickness teeth on the third pressing plate outer tooth surface 422 are the same as those of the unequal-thickness teeth on the outer edge of the second flange area 533; the third pressing plate bottom surface 423 is perpendicularly connected to the third pressing plate outer tooth surface 422; the third pressing plate inner surface 425 is perpendicular to the third pressing plate bottom surface 423; the transition between the third pressing plate bottom surface 423 and the third pressing plate inner surface 425 is the third pressing plate fillet 424; the third pressing plate fillet 424 is a convex fillet.

[0052] In one embodiment, as Figure 26 shown, the third female die 43 includes a third female die upper top surface 431, a third female die inner tooth surface 432, a third female die step surface 433, and a third female die inner surface 434; the third female die inner surface 434 includes a third female die V-shaped surface 4341 and a third female die inner cylindrical surface 4342, and the third female die V-shaped surface 4341 is consistent with the V-shaped gear profile of the fourth barrel wall area 552; the third lower punch 44 includes a third lower punch step surface 441, a third lower punch fillet 442, and a third lower punch outer surface 443; the third lower punch outer surface 443 and the third female die inner cylindrical surface 4342 are clearance fit surfaces.

[0053] Among them, the upper top surface 431 of the third female die is a toroidal surface, and a toothed structure is evenly distributed along the inner circle; the inner toothed surface 432 of the third female die is an evenly distributed toothed surface, and the inner toothed surface 432 of the third female die is perpendicular to the upper top surface 431 of the third female die; the stepped surface 433 of the third female die is a toroidal stepped surface, and a sunken toothed structure is evenly distributed along the outer circle, and the stepped surface 433 of the third female die is parallel to the upper top surface 431 of the third female die; the inner surface 434 of the third female die includes the V-shaped surface 4341 of the third female die and the inner cylindrical surface 4342 of the third female die; the V-shaped surface 4341 of the third female die has an annular V-shaped tooth structure and an annular convex structure, and the V-shaped surface 4341 of the third female die and the inner cylindrical surface 4342 of the third female die are coaxial.

[0054] In one embodiment, as Figure 27 shown, the third lower punch 44 includes a third lower punch stepped surface 441, a third lower punch fillet 442, and a third lower punch outer surface 443; the third lower punch fillet 442 is an upwardly convex annular arc-shaped structure, and the shape of the third lower punch fillet 442 is the same as the fillet shape on the outside of the third barrel bottom area 541; the third lower punch stepped surface 441 is composed of two parallel planes, and there is an arc transition between the two parallel planes; the third lower punch outer surface 443 is a cylindrical surface, and the third lower punch outer surface 443 is perpendicular to the third lower punch stepped surface 441.

[0055] The third lower punch stepped surface 441 is similar in shape to the first lower punch stepped surface 242; the third lower punch fillet 442 is a conical surface, and the conical surface of the third lower punch fillet 442 and the V-shaped surface 4341 of the third female die form an annular convex cavity; the third lower punch outer surface 443 and the inner cylindrical surface 4342 of the third female die are in clearance fit.

[0056] In one embodiment, the third female die 43 is fixedly installed on the lower support platform of the fourth press. The third lower male die 44 can move up and down along the inner cylindrical surface 4342 of the third female die. During mold closing, the first upper cylinder 45 of the fourth press pushes the third pressure plate 42 to press the third flange area 543 against the step surface 433 of the third female die. The second upper cylinder 46 of the fourth press pushes the third upper male die 41 downward. At the same time, the lower cylinder 47 of the fourth press pushes the third lower male die 44 upward to clamp the third bottom area 541, thus completing mold closing. After mold closing, a cavity with several circles of V-shaped teeth and an annular convex cavity is formed between the third female die 43, the third lower male die 44 and the thickened barrel wall forging 54. The third female die 43, the third lower male die 44 and the thickened barrel wall forging 54 form an annular bevel cavity above the fillet 442 of the third lower male die, which is a part of the annular convex cavity. During the final forming process of the V-shaped teeth on the barrel wall, the lower cylinder 47 of the fourth press pushes the third lower male die 44 upward and drives the third upper male die 41 and the third bottom area 541 to move upward together. The second upper cylinder 46 of the fourth press still applies a certain load downward to the third upper male die 41. As the lower cylinder 47 of the fourth press continues to move upward, the third lower male die 44, the third upper male die 41 and the third bottom area 541 continue to move upward. The third barrel wall area 542 is jointly extruded by the third upper male die 41, the third female die 43, the third lower male die 44 and the third pressure plate 42 and undergoes plastic deformation. The material of the third barrel wall area 542 slowly fills into the V-shaped tooth cavity and the annular convex cavity. The height of the third barrel wall area 542 continuously decreases. When both cavities are completely filled with material, the second upper cylinder 46 and the lower cylinder 47 of the fourth press both stop moving and hold pressure for a certain period of time, thereby obtaining the forged and formed part 55 with a thickened barrel wall.

[0057] Furthermore, during the R & D process, the applicant found that if a round blank 51 is directly forged and formed into a forged and formed part 55 using a single-step plate, the following technical problems will occur: 1) The unequal-thickness teeth in the fourth flange area of the forged and formed part and the V-shaped teeth in the fourth barrel wall area are not fully filled; 2) The forging and forming force is too large, which may cause cracking of the mold.

[0058] Therefore, after multiple adjustments to the process method and tests, the applicant finally developed the above-mentioned multi-step forging and forming method, which can significantly reduce the forming force, is conducive to filling the mold cavity with materials, and has the optimal process steps.

Claims

1. A plate forging method, applied to a plate forging device, characterized in that: The method comprises: A round plate blank (51) is forged into a flanged cylindrical part (52); the round plate blank (51) is a metal raw material to be forged; the flanged cylindrical part (52) comprises a first cylinder bottom area (521), a first cylinder wall area (522) and a first flange area (523); the first cylinder bottom area (521) is parallel to the first flange area (523); the first cylinder bottom area (521) and the first flange area (523) are respectively connected to two ends of the first cylinder wall area (522); a rounded transition is formed between the first cylinder bottom area (521) and the first cylinder wall area (522); The flanged cylindrical part (52) is forged so that the materials of the first barrel wall area (522) and the first flange area (523) fill the annular unequal thickness tooth cavity of the plate forging forming device, thereby obtaining an unequal thickness tooth plate forging (53); the unequal thickness tooth plate forging (53) comprises a second barrel bottom area (531), a second barrel wall area (532) and a second flange area (533); the second barrel bottom area (531) is parallel to the second flange area (533); the second barrel bottom area (531) and the second flange area (533) are respectively connected to the two ends of the second barrel wall area (532); the outer edge of the second flange area (533) is annular unequal thickness tooth shape; the height of the second barrel wall area (532) is less than the height of the first barrel wall area (522); and there is a rounded transition between the second barrel bottom area (531) and the second barrel wall area (532); The unequal thickness tooth plate forging (53) is forged into a cylinder wall thickening plate forging (54); the cylinder wall thickening plate forging (54) comprises a third cylinder bottom area (541), a third cylinder wall area (542) and a third flange area (543), the height of the third cylinder wall area (542) being less than the height of the second cylinder wall area (532); the third cylinder bottom area (541) is parallel to the third flange area (543); the third cylinder bottom area (541) and the third flange area (543) are respectively connected to two ends of the third cylinder wall area (542); the outer edge of the third flange area (543) is an annular unequal thickness tooth shape; the third cylinder bottom area (541) and the third cylinder wall area (542) have a rounded transition; The cylinder wall thickened plate forging (54) is forged so that the material of the third cylinder wall region (542) fills up the plurality of V-shaped tooth cavities and the annular protrusion cavity of the plate forging forming device, thereby obtaining a plate forging forming part (55); the plate forging forming part (55) The invention comprises a fourth barrel bottom area (551), a fourth barrel wall area (552) and a fourth flange area (553); the fourth barrel bottom area (551) is parallel to the fourth flange area (553); the fourth barrel bottom area (551) and the fourth flange area (553) are respectively connected to two ends of the fourth barrel wall area (552); the outer edge of the fourth flange area (553) is annular with uneven thickness teeth; there is a rounded transition between the fourth barrel bottom area (551) and the fourth barrel wall area (552); the height of the fourth barrel wall area (552) is lower than the height of the third barrel wall area (542); the outer wall of the fourth barrel wall area (552) has a plurality of circles of V-shaped teeth, and the plurality of circles of V-shaped teeth are arranged at intervals along the axial direction of the plate forging part (55); the outer wall of the connection between the fourth barrel wall area (552) and the fourth barrel bottom area (551) is annular with protrusions.

2. The method according to claim 1, characterized in that The plate forging forming device comprises a flanged cylindrical preforming die (1), and the flanged cylindrical preforming die (1) comprises a drawing punch (11), a blank holder (12), a drawing die (13), a first upper cylinder (14) of a first press, and a second upper cylinder (15) of the first press; the drawing punch (11) is connected to the second upper cylinder (15) of the first press, and the blank holder (12) is connected to the first upper cylinder (14) of the first press; the drawing die (13) is a cylinder with a pit in the middle; the drawing punch (11) is a cylinder that allows it to move up and down in the pit of the drawing die (13), and the blank holder (12) is located at the outer edge of the top of the drawing die (13); The method of forging a round plate blank (51) into a cylindrical part (52) with a flange comprises: A circular plate blank (51) with uniform thickness is placed centrally on the flange plane of the drawing die (13), and the first upper cylinder (14) of the first press is controlled to apply a blank holding force to the blank holding ring (12) so as to press the outer edge of the circular plate blank (51) against the flange plane of the drawing die (13); The second upper cylinder (15) of the first press is controlled to push the drawing punch (11) downward to draw the circular plate blank (51) into the first cavity to obtain a flanged cylindrical part (52) with uniform wall thickness; the first cavity is surrounded by the drawing punch (11), the pressure ring (12) and the drawing die (13).

3. The method according to claim 2, characterized in that The drawing punch (11) and the drawing die (13) are coaxial; The controlling the second upper cylinder (15) of the first press machine to push the drawing punch (11) downward comprises: The second upper cylinder (15) of the first press is controlled to push the drawing punch (11) downward until the thickness of the first gap (A) between the drawing punch (11) and the drawing die (13) reaches a target value; the target value is equal to a first multiple of the thickness of the circular plate blank (51); the second upper cylinder (15) of the first press is controlled to stop descending and maintain the pressure for a first preset time.

4. The method according to claim 1, characterized in that: The plate forging forming device comprises a unequal thickness tooth profile final forming plate forging die (2), and the unequal thickness tooth profile final forming plate forging die (2) comprises a first upper punch (21), a first pressing plate (22), a first die (23), a first lower punch (24), a first upper cylinder (25) of a second press, a second upper cylinder (26) of a second press, and a lower cylinder (27) of a second press; the first upper punch (21) is connected to the second upper cylinder (26) of the second press, the first pressing plate (22) is connected to the first upper cylinder (25) of the second press, and the first lower punch (24) is connected to the lower cylinder (27) of the second press; The middle of the first die (23) is a pit, and the top is a step with a stepped transition; the bottom of the pit of the first die (23) is the first lower punch (24) that allows upward and downward movement, and the outer wall of the first lower punch (24) is slidably matched with the inner wall of the first die (23); the first upper punch (21) is a cylinder that allows upward and downward movement in the pit of the first die (23), and the first pressing plate (22) is clearance-matched with the step of the first die (23); the outer edges of the first pressing plate (22), the first die (23) and the first flange area (523) form an annular tooth cavity with unequal thickness; The forging of the flanged cylindrical member (52) so that the materials of the first cylinder wall region (522) and the first flange region (523) fill the annular unequal thickness tooth cavity of the plate forging forming device to obtain an unequal thickness tooth plate forging (53) comprises: Placing the flanged cylindrical part (52) in the cavity of the first die (23), and controlling the first upper cylinder (25) of the second press machine to push the first pressing plate (22) downward, so as to press the first flange area (523) against the stepped flange plane of the first die (23); Controlling the lower cylinder (27) of the second press to push the first lower punch (24), the first upper punch (21), and the first barrel bottom area (521) upward, and at the same time, controlling the second upper cylinder (26) of the second press to apply a load downward to the first upper punch (21), so that the first barrel bottom area (521) is clamped; When the first barrel bottom area (521) is clamped, the second press lower cylinder (27) is controlled to continue to move upward so that the materials of the first barrel wall area (522) and the first flange area (523) fill the annular unequal thickness tooth cavity to obtain an unequal thickness tooth plate forging (53).

5. The method according to claim 4, characterized in that The first pressing plate (22) includes a first pressing plate step surface (221), a first pressing plate outer tooth surface (222), a first pressing plate bottom surface (223), a first pressing plate fillet (224) and a first pressing plate inner surface (225); the first pressing plate step surface (221) is vertically connected to the first pressing plate outer tooth surface (222); the number and shape of the unequal thickness teeth on the first pressing plate outer tooth surface (222) are consistent with the number and shape of the unequal thickness teeth on the outer edge of the second flange area (533); the first pressing plate bottom surface (223) is vertically connected to the first pressing plate outer tooth surface (222); the first pressing plate inner surface (225) is perpendicular to the first pressing plate bottom surface (223); the transition between the first pressing plate bottom surface (223) and the first pressing plate inner surface (225) is the first pressing plate fillet (224); the first pressing plate fillet (224) is a fillet convex outwardly; The first die (23) comprises a first die top surface (231), a first die inner tooth surface (232), a first die step surface (233) and a first die inner surface (234); two ends of the first die step surface (233) are respectively connected to the first die top surface (231) and the first die inner tooth surface (232); the connection between the first die step surface (233) and the first die inner tooth surface (232) is a tooth-shaped plane with pits; the first die inner surface (234) is a cylindrical surface, and the first die inner surface (234) and the first die step surface (233) are connected by a fillet transition; the first pressure plate outer tooth surface (222) and the first die inner tooth surface (232) are clearance-matched; the inner diameter of the first die inner surface (234) is smaller than the inner diameter of the first die top surface (231); The first lower punch (24) includes a first lower punch fillet (241), a first lower punch step surface (242) and a first lower punch outer surface (243); the first lower punch fillet (241) is an upwardly protruding annular arc-shaped structure, and the shape of the first lower punch fillet (241) is consistent with the fillet shape of the outer side of the first barrel bottom area (521); the first lower punch step surface (242) is composed of two parallel planes, and there is an arc transition between the two parallel planes; the first lower punch outer surface (243) is a cylindrical surface, and the first lower punch outer surface (243) is perpendicular to the first lower punch step surface (242).

6. The method according to claim 1, characterized in that The plate forging forming device comprises a barrel wall thickening preformed plate forging die (3), and the barrel wall thickening preformed plate forging die (3) comprises a second upper punch (31), a second pressing plate (32), a second die (33), a second lower punch (34), a first upper cylinder (35) of a third press, a second upper cylinder (36) of the third press, and a lower cylinder (37) of the third press; the second upper punch (31) is connected to the second upper cylinder (36) of the third press, the second pressing plate (32) is connected to the first upper cylinder (35) of the third press, and the second lower punch (34) is connected to the lower cylinder (37) of the third press; the second die (33) The middle of the second die (33) is a pit, and the top is a step with a stepped transition; the bottom of the pit of the second die (33) is the second lower punch (34) that allows upward and downward movement, and the outer wall of the second lower punch (34) is slidably matched with the inner wall of the second die (33); the second upper punch (31) is a cylinder that allows upward and downward movement in the pit of the second die (33), and the second pressing plate (32) is clearance-matched with the step of the second die (33); the outer edges of the second pressing plate (32), the second die (33) and the second flange area (533) form an annular tooth cavity with unequal thickness; The step of forging the unequal thickness tooth plate forging (53) into a cylinder wall thickened plate forging (54) comprises: Placing the unequal thickness tooth plate forging (53) in the cavity of the second die (33), and controlling the first upper cylinder (35) of the third press machine to push the second pressing plate (32) downward, so as to press the second flange area (533) against the stepped flange plane of the second die (33); The lower cylinder (37) of the third press is controlled to push the second lower punch (34), the second upper punch (31), and the second barrel bottom area (531) upward. At the same time, the second upper cylinder (36) of the third press is controlled to apply a load downward to the second upper punch (31) so that the second barrel bottom area (531) is clamped and the material of the second barrel wall area (532) fills the second cavity to obtain the barrel wall thickened plate forging (54); the second cavity is surrounded by the second die (33) and the unequal thickness tooth plate forging (53), and the thickness of the third barrel wall area (542) is greater than the thickness of the second barrel wall area (532).

7. The method according to claim 6, characterized in that The second upper punch (31), the second concave die (33), and the second lower punch (34) are all coaxial; The second pressing plate (32) includes a second pressing plate step surface (321), a second pressing plate outer tooth surface (322), a second pressing plate bottom surface (323), a second pressing plate fillet (324) and a second pressing plate inner surface (325); the second pressing plate step surface (321) is vertically connected to the second pressing plate outer tooth surface (322); the number and shape of the unequal thickness teeth on the second pressing plate outer tooth surface (322) are consistent with the number and shape of the unequal thickness teeth on the outer edge of the second flange area (533); the second pressing plate bottom surface (323) is vertically connected to the second pressing plate outer tooth surface (322); the second pressing plate inner surface (325) is perpendicular to the second pressing plate bottom surface (323); the transition between the second pressing plate bottom surface (323) and the second pressing plate inner surface (325) is the second pressing plate fillet (324); the second pressing plate fillet (324) is a fillet convex outward; The second die (33) comprises a second die top surface (331), a second die inner tooth surface (332), a second die step surface (333), and a second die inner surface (334); the second die step surface (333) is perpendicular to the second die inner tooth surface (332), and the connection between the second die step surface (333) and the second die inner tooth surface (332) is a tooth-shaped plane with pits; the second die inner surface (334) is a cylindrical surface, and the second die inner surface (334) and the second die step surface (333) are connected by a fillet transition; the second pressure plate outer tooth surface (322) and the second die inner tooth surface (332) are clearance-fitted; the inner diameter of the second die inner surface (334) is smaller than the inner diameter of the second die top surface (331); The second lower punch (34) comprises a second lower punch fillet (341), a second lower punch step surface (342) and a second lower punch outer surface (343); the second lower punch fillet (341) is an annular arc-shaped structure protruding upward; the second lower punch outer surface (343) and the second die inner surface (334) are clearance-matched; the second lower punch step surface (342) is composed of two parallel planes, and there is an arc transition between the two parallel planes; the second lower punch outer surface (343) is a cylindrical surface, and the second lower punch outer surface (343) is perpendicular to the second lower punch step surface (342); When the lower cylinder (37) of the third press pushes the second upper punch (31) upward, the distance between the second upper punch (31) and the second die (33) is equal to the second gap (C); the minimum value of the second gap (C) is greater than the first multiple of the thickness of the circular slab (51), and the maximum value of the second gap (C) is less than the second multiple of the thickness of the circular slab (51); the second multiple is greater than the first multiple.

8. The method according to claim 1, characterized in that: The plate forging forming device comprises a cylinder wall V-shaped tooth final forming plate forging die (4), and the cylinder wall V-shaped tooth final forming plate forging die (4) comprises a third upper punch (41), a third pressing plate (42), a third die (43), a third lower punch (44), a first upper cylinder (45) of a fourth press, a second upper cylinder (46) of a fourth press, and a lower cylinder (47) of a fourth press; the third upper punch (41) is connected to the second upper cylinder (46) of the fourth press, the third pressing plate (42) is connected to the first upper cylinder (45) of the fourth press, and the third lower punch (44) is connected to the lower cylinder (47) of the fourth press; the third die (43) The middle is a pit, and the top is a step with a stepped transition; the bottom of the pit of the third die (43) is the third lower punch (44) that allows upward and downward movement, and the outer wall of the third lower punch (44) is slidably matched with the inner wall of the third die (43); the third upper punch (41) is a cylinder that allows upward and downward movement in the pit of the third die (43), and the third pressing plate (42) is clearance-matched with the step of the third die (43); the outer edges of the third pressing plate (42), the third die (43) and the third flange area (543) form an annular tooth cavity of unequal thickness; the inner wall of the third die (43) has a plurality of circles of V-shaped tooth cavities and annular protruding cavities, and the plurality of circles of V-shaped tooth cavities are arranged at intervals along the axial direction of the inner wall of the third die (43); the annular protruding cavity is arranged along the bottom of the inner wall of the third die (43); The forging of the cylinder wall thickened plate forging (54) is performed so that the material of the third cylinder wall region (542) fills up a plurality of V-shaped tooth cavities and annular protrusion cavities of the plate forging forming device to obtain a plate forging forming part (55), comprising: The barrel wall thickening plate forging (54) is placed in the cavity of the third die (43), and the first upper cylinder (45) of the fourth press machine is controlled to push the third pressing plate (42) downward, so as to press the third flange area (543) against the stepped flange plane of the third die (43); The fourth press machine lower cylinder (47) is controlled to push the third lower punch (44), the third upper punch (41), and the third barrel bottom area (541) upward. At the same time, the fourth press machine second upper cylinder (46) is controlled to apply a load downward to the third upper punch (41) so that the third barrel bottom area (541) is clamped and the third barrel wall area (542) is filled with materials to form a plurality of V-shaped tooth cavities and annular protrusion cavities, thereby obtaining a plate forging part (55); the plurality of V-shaped tooth cavities and annular protrusion cavities are surrounded by the third die (43) and the third barrel wall area (542).

9. The method according to claim 8, characterized in that The third die (43) includes a third die upper top surface (431), a third die inner tooth surface (432), a third die step surface (433) and a third die inner surface (434); the third die inner surface (434) includes a third die V-shaped surface (4341) and a third die inner cylindrical surface (4342), and the third die V-shaped surface (4341) is consistent with the V-shaped tooth profile of the fourth barrel wall area (552); the third lower punch (44) includes a third lower punch step surface (441), a third lower punch fillet (442) and a third lower punch outer surface (443); the third lower punch outer surface (443) and the third die inner cylindrical surface (4342) are clearance fitting surfaces.

10. The method according to claim 8, characterized in that The third pressing plate (42) includes a third pressing plate step surface (421), a third pressing plate outer tooth surface (422), a third pressing plate bottom surface (423), a third pressing plate fillet (424) and a third pressing plate inner surface (425); the third pressing plate step surface (421) is vertically connected to the third pressing plate outer tooth surface (422); the number and shape of the unequal thickness teeth on the third pressing plate outer tooth surface (422) are consistent with the number and shape of the unequal thickness teeth on the outer edge of the second flange area (533); the third pressing plate bottom surface (423) is vertically connected to the third pressing plate outer tooth surface (422); the third pressing plate inner surface (425) is perpendicular to the third pressing plate bottom surface (423); the transition between the third pressing plate bottom surface (423) and the third pressing plate inner surface (425) is the third pressing plate fillet (424); the third pressing plate fillet (424) is a fillet convex outward; The third lower punch (44) includes a third lower punch step surface (441), a third lower punch fillet (442) and a third lower punch outer surface (443); the third lower punch fillet (442) is an upwardly protruding annular arc-shaped structure, and the shape of the third lower punch fillet (442) is consistent with the fillet shape of the outer side of the third barrel bottom area (541); the third lower punch step surface (441) is composed of two parallel planes, and there is an arc transition between the two parallel planes; the third lower punch outer surface (443) is a cylindrical surface, and the third lower punch outer surface (443) is perpendicular to the third lower punch step surface (441).

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