Method for rolling forming end face of large taper special-shaped section ring

Abstract

The present application relates to the technical field of special-shaped ring forming, and particularly relates to an end face rolling forming method of a large-taper special-shaped cross-section ring piece. The end face rolling forming method of the large-taper special-shaped cross-section ring piece comprises the following steps: (a) performing flaring treatment on a rectangular cross-section ring blank to obtain a blank with a trumpet-shaped one-side end portion; (b) placing the blank in a ring-shaped lower die, and adopting a press roller and a taper roller to respectively abut against the trumpet-shaped upper end face of the blank, wherein the taper roller rotates around a taper shaft to drive the blank to rotate, and the trumpet-shaped upper end face of the blank is rolled downward until the taper roller reaches a target downward pressing distance, and then the blank is demolded. According to the end face rolling forming method, the rectangular cross-section ring blank is pre-flared, and then the blank is subjected to end face rolling treatment in cooperation with a corresponding die, so that the forming of the large-taper special-shaped cross-section ring piece can be realized, and meanwhile, the forming quality of the ring piece is ensured, and the ring piece has excellent surface flatness and size precision.

Description

Technical Field

[0001] This invention relates to the field of irregular ring forming technology, and in particular to a method for end face rolling forming of a large-tapered irregular cross-section ring. Background Technology

[0002] With the continuous development of science and technology, the forming methods of rings have also made significant progress. As application demands continue to change, rings have evolved from traditional rectangular cross-section rings to irregularly shaped cross-section rings. Large-tapered irregularly shaped cross-section rings are tapered rings with different top and bottom diameters and varying wall thicknesses. However, due to limitations in current forming technology and equipment, large-tapered irregularly shaped cross-section rings are difficult to form.

[0003] In view of this, the present invention is hereby proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a method for end face rolling forming of ring parts with large taper and irregular cross-section, which can form ring parts with large taper and irregular cross-section.

[0005] To achieve the above-mentioned objectives of the present invention, one aspect of the present invention provides a method for end face rolling forming of a ring with a large taper and irregular cross-section, comprising the following steps:

[0006] (a) The rectangular cross-section ring blank is flared to obtain a blank with a trumpet-shaped end on one side;

[0007] (b) The blank is placed in the annular lower mold, and the pressure roller and the conical roller are respectively abutted against the upper end face of the flared mouth of the blank. The conical roller rotates around the conical axis, driving the blank to rotate and pressing the upper end face of the flared mouth of the blank downward until the conical roller reaches the target pressing distance, and then the blank is demolded.

[0008] The cavity structure of the annular lower die matches the size of the large-tapered irregular cross-section ring; the shape of the tapered roller surface matches the shape of the upper end face of the large-tapered irregular cross-section ring; and the target pressing distance is the difference between the height of the trumpet-shaped blank and the height of the large-tapered irregular cross-section ring.

[0009] In a specific embodiment of the present invention, the taper of the large-tapered irregular cross-section ring is 110° to 170°.

[0010] In a specific embodiment of the present invention, the inner diameter of the rectangular cross-section ring blank is the same as the inner diameter of the large-tapered irregular cross-section ring; the outer diameter of the rectangular cross-section ring blank is the same as the minimum outer diameter of the large-tapered irregular cross-section ring.

[0011] In a specific embodiment of the present invention, the rectangular cross-section ring blank and the large-tapered irregular cross-section ring have the same weight.

[0012] In a specific embodiment of the present invention, the conical roller and the pressure roller are respectively arranged on opposite sides of the annular lower die.

[0013] In a specific embodiment of the present invention, the taper of the tapered roller is 55° to 65°.

[0014] In a specific embodiment of the present invention, in step (a), the angle formed by the flared mouth shape is 25° to 35°. Further, in the flaring process, the expansion angle for each pass is 10° to 15°.

[0015] In a specific embodiment of the present invention, in step (b), during the rolling process: the rotational speed of the conical roller is 30 to 40 rad / min, and the downward pressing speed of the conical roller is 1 to 3 mm / s.

[0016] In a specific embodiment of the present invention, after the conical roller reaches the target pressing distance, the conical roller continues to rotate while maintaining a constant height, driving the billet to rotate 3 to 5 times.

[0017] In a specific embodiment of the present invention, the method further includes: heat-treating the demolded large-tapered irregular cross-section ring.

[0018] In a specific embodiment of the present invention, the rectangular cross-section ring blank is made of 7050 aluminum alloy.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention enables the forming of large-tapered irregular-shaped ring parts by pre-flaring a rectangular cross-section ring blank and then rolling the end face of the blank with a corresponding mold. This process ensures the forming quality of the ring part, resulting in excellent surface flatness and dimensional accuracy. Furthermore, the forming method of this invention has high material utilization. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a blank with one end flared into a trumpet shape, provided by an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the assembly structure during the downward rolling process provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the assembly structure after the downward rolling process is completed, as provided in an embodiment of the present invention.

[0025] Figure 4 This is a schematic cross-sectional view of the target large-tapered irregular cross-section ring provided in Embodiment 1 of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the target large-tapered irregular cross-section ring provided in Embodiment 1 of the present invention;

[0027] Figure 6 This is a schematic diagram of the cross-sectional structure of the rectangular cross-section ring blank provided in Embodiment 1 of the present invention.

[0028] Figure label:

[0029] 1-Blank; 2-Annular lower die; 3-Pressure roller;

[0030] 4-Cone roller. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] This invention provides a method for end face rolling forming of a ring with a large taper and irregular cross-section, comprising the following steps:

[0034] (a) The rectangular cross-section ring blank is flared to obtain a blank with a trumpet-shaped end on one side;

[0035] (b) Place the blank in the annular lower die, and use the pressure roller and the conical roller to abut against the upper end face of the flared mouth of the blank. The conical roller rotates around the conical axis, driving the blank to rotate and pressing the upper end face of the flared mouth of the blank downward until the conical roller reaches the target pressing distance, and then demold.

[0036] Among them, the cavity structure of the annular lower die matches the size of the large-tapered irregular cross-section ring; the shape of the tapered roller surface matches the shape of the upper end face of the large-tapered irregular cross-section ring; the target pressing distance is the difference between the height of the trumpet-shaped blank and the height of the large-tapered irregular cross-section ring.

[0037] This invention enables the forming of large-tapered irregular-shaped ring parts by pre-flaring a rectangular cross-section ring blank and then rolling the end face of the blank with a corresponding mold. This process ensures the forming quality of the ring part, resulting in excellent surface flatness and dimensional accuracy. Furthermore, the forming method of this invention has high material utilization.

[0038] Furthermore, in the forming method of the present invention, the center point of the tapered roller does not need to be fixed on the central axis of the annular lower die. The horizontal position of the tapered roller can be adjusted according to the size of the large-tapered irregular cross-section ring, which can meet the production needs of large-size ring components. The forming method of the present invention has no requirements on the outer diameter of the large-tapered irregular ring.

[0039] Matching the cavity structure of the annular lower die with the dimensions of the large-tapered irregular cross-section ring means that the cavity structure of the annular lower die is determined by the inner diameter, outer diameter, height, and geometry of the large-tapered irregular cross-section ring, i.e., the annular lower die has a cavity that matches the outer surface of the large-tapered irregular cross-section ring. Matching the shape of the tapered roller surface with the shape of the upper end face of the large-tapered irregular cross-section ring means that the shape of the tapered roller surface is determined by the shape of the upper end face of the large-tapered irregular cross-section ring. For example, if the upper end face of the large-tapered irregular cross-section ring is flat, then the surface of the tapered roller is flat; if the upper end face of the large-tapered irregular cross-section ring has uniformly distributed grooves, then the surface of the tapered roller has protrusions in the same distribution. The target pressing distance is the difference between the height of the trumpet-shaped blank and the height of the large-tapered irregular cross-section ring.

[0040] Figure 1 This is a schematic diagram of a billet with a flared end, obtained through a flaring process according to an embodiment of the present invention. As shown in the diagram, in the billet obtained through the flaring process, one end is flared, while the other end retains the inner and outer diameters of the original rectangular cross-section ring billet. In step (a), the angle formed by the flared shape, i.e., the angle α formed between the inner diameter wall after flaring and the axis, is 25° to 35°. In different embodiments, the angle formed by the flared shape can be 25°, 28°, 30°, 32°, 35°, or any combination thereof.

[0041] In practice, the height of the unflared portion is greater than or equal to the height of the portion of the ring with the minimum outer diameter corresponding to the large taper cross-section ring in the lower ring die.

[0042] In a specific embodiment of the present invention, in the flaring process of step (a), the corresponding flared shape can be formed by at least one pass. Further, in the flaring process, the flaring angle for each pass is 10° to 15°.

[0043] In different implementations, the flaring process can be performed with an flaring angle of 10°, 11°, 12°, 13°, 14°, 15° or any combination thereof.

[0044] In practice, a press can be used to flare the rectangular cross-section ring blank after heat preservation treatment using a punch.

[0045] like Figure 2 This is a schematic diagram of the assembly structure during the downward rolling process provided in an embodiment of the present invention (partial downward rolling process has been performed). Specifically, the blank 1 is placed in the annular lower mold 2, with the unflared part facing downward and abutting against the bottom of the cavity of the annular lower mold 2. The flared part is arranged with the trumpet shape facing upward. The pressure roller 3 and the conical roller 4 abut against the upper end face of the trumpet shape of the blank 1, respectively. The conical roller 4 is set horizontally throughout the process (that is, the surface abutting against the blank is always horizontal). The conical roller 4 rotates around its conical axis, driving the blank 1 to rotate and rolling the upper end face of the trumpet shape of the blank 1 downward until the conical roller 4 reaches the target downward pressing distance, and then demolding.

[0046] During the rolling process, the lower bottom surface (horizontally set) of the conical roller 4 rolls and shapes the upper end surface of the blank 1. During this process, the conical roller 4 moves downwards while simultaneously rotating around its conical axis. The friction between the conical roller 4 and the blank 1 causes the blank 1 to rotate, while the friction between the blank 1 and the annular lower die 2 causes the annular lower die 2 to rotate synchronously with the blank 1. As the conical roller 4 continues to move downwards, the blank 1 undergoes continuous plastic deformation between the conical roller 4 and the annular lower die 2, gradually filling the cavity of the annular lower die 2, ultimately resulting in a large-tapered irregular cross-section annular part.

[0047] In a specific embodiment of the present invention, when the conical roller 4 reaches the target pressing distance, the conical roller 4 stops feeding downwards, that is, it continues to rotate while maintaining the same height, driving the blank 1 to rotate 3 to 5 times, so as to ensure the surface flatness and dimensional accuracy of the large-tapered irregular cross-section ring.

[0048] Furthermore, the conical roller 4 and the pressure roller 3 are respectively arranged on opposite sides of the annular lower die 2, and both the conical roller 4 and the pressure roller 3 are arranged on the upper end face of the blank 1. The pressure roller 3 presses down on the upper surface of the blank 1 to prevent the blank 1 from warping or misaligning under the action of the conical roller 4.

[0049] like Figure 3 This is a schematic diagram of the assembly structure after the downward rolling process provided in an embodiment of the present invention. As shown in the diagram, the large-tapered irregular cross-section obtained by rolling fills the cavity of the annular lower die 2, and its upper surface is in contact with the surface of the tapered roller 4. The surface shape of the tapered roller 4 is determined by the geometry of the upper end face of the large-tapered irregular cross-section ring to be formed; that is, the rolling of the tapered roller 4 forms a matching geometry on its upper end face. The cavity structure of the annular lower die 2 is determined by the inner diameter, outer diameter, height, and geometry of the large-tapered irregular cross-section ring to be formed, so that after the tapered roller 4 reaches the target downward pressing distance, the blank fills the cavity of the annular lower die 2, forming a ring structure with the same shape as the cavity.

[0050] In a specific embodiment of the present invention, the taper of the large-tapered irregular cross-section ring is 110° to 170°.

[0051] In various embodiments, the forming method of the present invention can form irregularly shaped cross-section rings with taper angles of 110°, 120°, 130°, 140°, 150°, 160°, 170°, or any combination thereof. Here, the taper angle refers to the angle between the outer inclined edge and the vertical direction in the cross-section of the large-tapered irregularly shaped cross-section ring. Figure 4 As shown in β.

[0052] In a specific embodiment of the present invention, the taper of the tapered roller is 55° to 65°.

[0053] In different embodiments, the taper of the conical roller can be a range of 55°, 58°, 60°, 62°, 65°, or any combination thereof. The taper of the conical roller is its cone angle.

[0054] In a specific embodiment of the present invention, the inner diameter of the rectangular cross-section ring blank is the same as the inner diameter of the large-tapered irregular cross-section ring; the outer diameter of the rectangular cross-section ring blank is the same as the minimum outer diameter of the large-tapered irregular cross-section ring.

[0055] In a specific embodiment of the present invention, the rectangular cross-section ring blank and the large-tapered irregular cross-section ring part have the same weight.

[0056] In practice, based on the forging drawing of the large-tapered irregular cross-section ring to be formed, the blanking weight and blanking specifications are determined, and a rectangular cross-section ring blank with dimensions meeting the above conditions is made from round bar stock.

[0057] The preparation of a rectangular cross-section ring blank may include the following steps:

[0058] (1) Blanking: Based on the geometry of the large tapered irregular cross-section ring to be formed, calculate and determine the specifications and weight of the blank, and use a saw to cut the blank on the round bar.

[0059] (2) Heating: According to the thermoplastic forming requirements of the billet material, the billet is heated to the forgeable temperature of the material, held at the temperature, and then taken out of the furnace for subsequent forging;

[0060] (3) Forging: The billet is drawn out along the axial direction, then upset along the axial direction. This process is repeated three times for drawing and two times for upsetting. After drawing out along the axial direction again, the end face is rolled to be flat.

[0061] (4) Punching: After heating the billet, it is upset along the axial direction, then punched with a punch, then rolled and trimmed to eliminate large R angles, and then returned to the furnace for heat preservation;

[0062] (5) Ring rolling: The perforated billet after heat preservation is rolled into a rectangular cross-section ring billet of the corresponding size on a ring rolling mill and then returned to the furnace for heat preservation.

[0063] In a specific embodiment of the present invention, the rectangular cross-section ring billet is subjected to a heat-holding treatment before the flaring process. This heat-holding treatment involves heating the ring billet to its forgeable temperature, and the holding time is set according to the specifications of the ring billet.

[0064] In a specific embodiment of the present invention, step (b) includes: the rotational speed of the conical roller is 30 to 40 rad / min, and the downward pressing speed of the conical roller is 1 to 3 mm / s.

[0065] In different embodiments, the rotational speed of the conical roller can be within the range of 30 rad / min, 32 rad / min, 35 rad / min, 38 rad / min, 40 rad / min, or any combination thereof, and the pressing speed of the conical roller can be within the range of 1 mm / s, 1.2 mm / s, 1.5 mm / s, 1.8 mm / s, 2 mm / s, 2.2 mm / s, 2.5 mm / s, 2.8 mm / s, 3 mm / s, or any combination thereof. The rotational speed and pressing speed of the conical roller can be adjusted and selected according to the hot forging requirements of the material.

[0066] In a specific embodiment of the present invention, the downward displacement of the cone roller is set according to the target downward displacement distance.

[0067] In a specific embodiment of the present invention, the billet is subjected to a heat preservation treatment before rolling. This heat preservation treatment involves heating the billet to its forgeable temperature, and the standard heat preservation time can be set according to the billet specifications.

[0068] In a specific embodiment of the present invention, the method further includes: heat-treating the large-tapered irregular cross-section ring after demolding.

[0069] The heat treatment is selected and adjusted according to the material of the ring. For example, when it is 7050 aluminum alloy, the heat treatment includes quenching and artificial aging. Quenching includes holding at 477±5℃ for 6 hours and then water cooling; artificial aging includes holding at 120±5℃ for 6 hours, then holding at 175±5℃ for 6 hours and then air cooling.

[0070] In a specific embodiment of the present invention, the material of the rectangular cross-section ring blank is 7050 aluminum alloy, but it is not limited to this.

[0071] Example 1

[0072] This embodiment provides a ring component with a large taper and irregular cross-section, such as... Figure 4 and Figure 5 As shown, the ring has a maximum outer diameter of 626 mm, a minimum outer diameter of 496 mm, an inner diameter of 369 mm, and a taper β of 121.81°. This large-tapered irregularly shaped ring is made of 7050 aluminum alloy with a density of 2.82 g / cm³. 3 The Poisson's ratio v is 0.32–0.36, the Young's modulus E is 70,000 MPa, and the yield strength σ is... s The tensile strength is 455 MPa, and the tensile strength σ is 0.5%. p It is 524 MPa.

[0073] The end face rolling forming method for the large-tapered irregular cross-section ring in this embodiment includes the following steps:

[0074] (1) Blank preparation:

[0075] according to Figure 4 Based on the geometry shown, the blank is determined to be a blank with specifications of Φ530mm×81mm and a weight of 53kg. The blank is cut on a round bar using a saw. The blank is heated to 420±10℃ and held for 180min.

[0076] Then, the billet is drawn axially to L = (110 ± 10) mm, and then upset axially to H = (80 ± 10) mm. This process of three drawing and two upsetting is repeated until the billet is drawn axially to (Φ315 ± 5 × L, L ≥ 200) mm. After that, the end face is rolled flat.

[0077] Then, heat the billet to 420±10℃ and hold it for 120 minutes. Then, upset it along the axial direction to H=(150±5)mm. Then, use a Φ95mm~Φ125mm punch to punch holes with a core thickness ≤75mm. Roll it to round and trim the bulge and eliminate large R angles.

[0078] Then, the billet is heated to 420±10℃ and held for 100 minutes before being rolled into the shape shown on a ring mill. Figure 6 The rectangular cross-section ring blank of the dimensions shown is returned to the furnace and kept warm for 90 minutes.

[0079] (2) Widening of the rolling zone of the rectangular cross-section ring billet:

[0080] On a press, a punch is used to flare the rolling area of ​​the billet after heat preservation in step (1). The flaring is carried out in two passes, with an flaring angle of 15° for each pass. The rolling area of ​​the billet after flaring is 30° trumpet-shaped.

[0081] (3) End face rolling forming:

[0082] Set the rolling parameters: Based on the hot forging requirements of 7050 aluminum alloy, set the speed of the tapered roller to 35 rad / min and the pressing speed to 2 mm / s. Based on the height of the large-tapered irregular cross-section ring and the height of the flared billet, set the pressing displacement of the tapered roller to 40 mm.

[0083] After the billet obtained in step (2) is kept hot in the furnace for 90 minutes, it is taken out and placed in the annular mold below the conical roller and the pressure roller. The conical roller and the pressure roller are respectively arranged on the two sides of the annular lower mold that are laterally opposite. The conical roller is a small-tapered conical roller with a taper of 60° and is arranged on the upper end face of one side of the billet. The surface shape of the conical roller is determined by the geometry of the upper end face of the large-tapered irregular cross-section ring to be formed. The shape of the cavity of the annular lower mold is determined by the inner diameter, outer diameter and height of the large-tapered irregular cross-section ring to be formed and the geometry. The pressure roller presses the upper surface of the billet on the other side of the annular lower mold to prevent the billet from warping and misaligning under the action of the conical roller.

[0084] The lower surface of the conical roller is used to roll and form the upper end face of the billet. During the end face rolling process, the conical roller moves downward on one hand and rotates around its conical axis on the other. The friction between the conical roller and the billet drives the billet to rotate, while the friction between the billet and the annular lower die drives the annular lower die to rotate synchronously with the billet. As the conical roller continues to move downward, the billet undergoes continuous plastic deformation between the conical roller and the annular lower die, gradually filling the cavity of the annular lower die, and finally obtaining a large-tapered irregular cross-section ring forging. When the conical roller moves downward to the target height, it stops feeding downward and continues to rotate at this height, so that the large-tapered irregular cross-section ring forging rotates 5 times to ensure the surface flatness and dimensional accuracy of the large-tapered irregular cross-section ring forging.

[0085] After rolling, the tapered roller moves upward and leaves the large-tapered irregular cross-section ring. The large-tapered irregular cross-section ring is demolded by the ejection device inside the annular lower die, and then removed.

[0086] (4) Heat treatment:

[0087] The large tapered irregular cross-section ring obtained in step (3) was subjected to quenching heat treatment at a heating temperature of 477±5℃ and held for 6 hours before being water cooled.

[0088] Then, the large-tapered irregular cross-section ring is subjected to artificial aging treatment. The heating temperature is 120±5℃, and the holding time is 6 hours. Then, the heating temperature is 175±5℃, and the holding time is 6 hours before air cooling.

[0089] The method of this invention enables the forming of rings with large taper and irregular cross-sections, while ensuring the forming quality of the rings, giving them excellent surface flatness and dimensional accuracy, and high material utilization.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for end-face rolling forming of a ring with a large taper and irregular cross-section, characterized in that, Includes the following steps: (a) The rectangular cross-section ring blank is flared to obtain a blank with a flared end on one side; (b) The blank is placed in the annular lower mold, and the pressure roller and the conical roller are respectively abutted against the upper end face of the flared mouth of the blank. The conical roller rotates around the conical axis, driving the blank to rotate and pressing the upper end face of the flared mouth of the blank downward until the conical roller reaches the target pressing distance, and then the blank is demolded. The cavity structure of the annular lower die matches the size of the large-tapered irregular cross-section ring; the shape of the tapered roller surface matches the shape of the upper end face of the large-tapered irregular cross-section ring; and the target pressing distance is the difference between the height of the trumpet-shaped blank and the height of the large-tapered irregular cross-section ring.

2. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, The taper of the large-tapered irregular cross-section ring is 110° to 170°.

3. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, The inner diameter of the rectangular cross-section ring blank is the same as the inner diameter of the large-tapered irregular cross-section ring; the outer diameter of the rectangular cross-section ring blank is the same as the minimum outer diameter of the large-tapered irregular cross-section ring.

4. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, The rectangular cross-section ring blank has the same weight as the large-tapered irregular cross-section ring.

5. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, The conical roller and the pressure roller are respectively arranged on opposite sides of the annular lower die.

6. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 5, characterized in that, The taper of the tapered roller is 55° to 65°.

7. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, In step (a), the angle formed by the flared mouth shape is 25° to 35°.

8. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, In the flaring process, the flaring angle for each pass is 10° to 15°.

9. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, In step (b), during the rolling process: the rotational speed of the conical roller is 30-40 rad / min, and the downward pressing speed of the conical roller is 1-3 mm / s.

10. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, Once the cone roller reaches the target pressing distance, it continues to rotate while maintaining its height, causing the billet to rotate 3 to 5 revolutions.

11. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, Also includes: The demolded large-tapered irregular cross-section ring is then heat-treated.

12. The end face rolling forming method for a large-tapered irregular cross-section ring according to claim 1, characterized in that, The rectangular cross-section ring blank is made of 7050 aluminum alloy.

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