Insert type large edge constraint spinning device with rib groove and spinning forming method

Abstract

The invention discloses an insert type large edge constraint spinning device with rib grooves and a spinning forming method, relates to the technical field of spinning manufacturing, and solves the problem that a preparation device of a conical rotary body component with outer ribs is difficult to demould. The device comprises a spinning structure and a female die, and the spinning structure and the female die are matched to prepare a ribbed spinning part; the female die comprises a plurality of longitudinal rib inserts, a plurality of ring rib inserts, a discharging plate and a die sleeve. The discharging plate is arranged at the bottom of the inner side of the die sleeve. The die sleeve is of a conical structure, a net-shaped groove is formed in the inner wall, and a blank holder is arranged at the upper end. The longitudinal rib inserts and the annular rib inserts are connected to form a net-shaped frame structure and then are arranged in the net-shaped grooves; and rib grooves are formed in the longitudinal rib insert and the annular rib insert. The female die is composed of a die sleeve and an insert, and the insert is provided with a rib groove used for forming the rib part of the spinning part. During demolding, the inserts and the spinning part are separated from the mold sleeve together, and then the inserts are disassembled one by one in the normal direction of the rib grooves, so that the spinning part is separated from the inserts.

Description

Technical Field

[0001] The invention relates to the technical field of spinning manufacturing, in particular to an insert-type large-scale edge-constrained spinning device with ribbed grooves and a spinning forming method. Background Art

[0002] The integrated manufacturing of complex thin-walled components is an effective way to achieve larger and lighter aerospace equipment. Currently, many key aerospace load-bearing components are designed as large, thin-walled bodies of revolution, often with features such as localized reinforcement ribs. However, achieving efficient integrated manufacturing of these components has always been a challenge.

[0003] The spinning process is commonly used for integrally forming thin-walled components of revolution, characterized by high efficiency, low cost, and excellent flexibility. Edge-constrained spinning involves securing the edges of a rotating blank and applying progressive load from the edge toward the center via a spinning wheel, allowing the blank to gradually deform into a thin-walled component of revolution along the predetermined trajectory of the spinning wheel. For large, thin-walled bottom-sealing structures, edge-constrained spinning significantly improves blank rigidity, preventing the problem of edge instability and wrinkling during spinning. It also enables the integral forming of thin-walled components of revolution with flanges and large aspect ratios, as well as large diameter-to-thickness ratios.

[0004] For large-sized thin-walled rotating components with external reinforcing ribs, they can be effectively formed as a whole through a spinning mold with rib grooves. In order to achieve smooth demolding of the ribbed components, the die needs to be designed as a split or insert structure. In the prior art, there is a device that provides rib grooves on a split mold for spinning to prepare conical rotating components with external ribs. However, when preparing the rotating components, the rib grooves of the die will be filled with workpiece metal. For reinforcing ribs with rectangular, trapezoidal, semicircular and other cross-sections, the ribs of the workpiece and the rib grooves of the mold will interfere in the axial direction, resulting in difficulty in demolding. Summary of the Invention

[0005] To address the aforementioned demolding difficulties encountered in existing apparatuses for producing conical, rotatable components with external ribs, this invention proposes an insert-type, large-scale, edge-constrained spinning apparatus with ribbed grooves and a spinning method. The die comprises a die sleeve and an insert, which is provided with ribbed grooves for forming the ribs of the spun component. During demolding, the insert and the spun component are separated from the die sleeve together, and then the inserts are disassembled one by one to separate the spun component from the inserts.

[0006] The present invention proposes a large-scale edge-constrained spinning device with an insert type ribbed groove, which specifically includes a spinning structure and a die, and the spinning structure and the die cooperate to prepare ribbed spun parts; the die includes a plurality of longitudinal rib inserts, a plurality of annular rib inserts, a stripper plate and a die sleeve, and the stripper plate is arranged at the bottom inner side of the die sleeve; the die sleeve is a conical structure, with a mesh groove provided on the inner wall and a pressure ring provided on the upper end; the longitudinal rib inserts and the annular rib inserts are connected to form a mesh frame structure and are arranged in the mesh groove; the longitudinal rib inserts and the annular rib inserts are provided with rib grooves.

[0007] Furthermore, the longitudinal reinforcement insert is provided with a plurality of inlay grooves, and the annular reinforcement insert is centrally inlaid into the inlay grooves.

[0008] Furthermore, the angle between the upper inner wall of the inlay groove and the vertical direction is 1°-5°.

[0009] Furthermore, the rib grooves on the annular rib insert are cross-shaped, and the vertical rib grooves in the cross-shaped rib grooves are connected to the rib grooves of the longitudinal rib insert.

[0010] Furthermore, the annular rib inserts are connected by connecting ears; the connecting ears include connecting ear one and connecting ear two respectively arranged at both ends of the annular rib insert, connecting ear one is arranged on the front side of the annular rib insert, and connecting ear two is arranged on the back side of the annular rib insert; connecting ear one is provided with an annular rib insert fastening through hole, and connecting ear two is provided with an annular rib insert fastening screw hole.

[0011] Furthermore, the annular reinforcement insert is provided with a longitudinal reinforcement insert fastening screw hole, and the inlay groove is provided with a through hole that cooperates with the longitudinal reinforcement insert fastening screw hole.

[0012] Furthermore, the annular rib insert is connected to the die sleeve via a plurality of die fastening screw holes.

[0013] Furthermore, the annular reinforcement inserts include a plurality of upper inserts and a plurality of lower inserts.

[0014] Furthermore, the spinning structure includes a roller seat and a roller, and the roller is rotatably arranged on the roller seat.

[0015] A constrained spinning forming method for a tapered rotating body component with external ribs using the above-mentioned insert-type large-scale edge constrained spinning device with rib grooves is characterized by comprising the following steps: Step 1: Place the die sleeve flat on the flat ground, install the stripper plate, assemble the longitudinal rib inserts and the ring rib inserts into a frame structure and assemble it to the die sleeve; install the assembled die on the main shaft of the spinning machine; Step 2: After the die is preheated, the blank is clamped on the die with a blank holder, and multiple passes of edge-constrained spinning are performed to integrally form a thin-walled rotating body component with external reinforcing ribs; Step 3: After spinning is completed, disassemble the die and the rotating body component together, place the spinning device with the mouth facing upward on a flat ground, and use the lifting holes on the unloading plate to lift the insert frame and the rotating body component together to separate the die sleeve; Step 4: first remove the longitudinal reinforcement insert, then remove the annular reinforcement insert, and remove them along the normal direction of the reinforcement groove to achieve the overall demoulding of the spun part with reinforcement ribs.

[0016] The beneficial effects of the large-scale edge-constrained spinning device and spinning method of the insert-type ribbed groove described in the present invention are: (1) The present invention relates to an insert-type large-scale edge-constrained spinning device with ribbed grooves and a spinning forming method. The die is composed of a die sleeve and an insert. A plurality of longitudinal rib inserts and a plurality of annular rib inserts can form a mesh frame structure. There is no axial interference between the insert and the die sleeve. During demoulding, the spun part and the insert are separated from the die sleeve as a whole through the unloading plate. Then, the inserts are disassembled one by one along the normal direction of the ribbed groove, so that the spun part and the insert are separated, thereby avoiding the problem of difficulty in demoulding caused by interference between the split die and the rib structure of the spun part.

[0017] (2) In the large-scale edge-constrained spinning device and spinning method for insert-type ribbed grooves described in the present invention, the angle between the upper inner wall of the insert groove of the longitudinal rib insert and the vertical direction is 1°-5°. This draft angle ensures smooth separation between the inserts and smooth demolding of the spun parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] In the attached figure: Figure 1 This is a schematic structural diagram of a large-scale edge-constrained spinning device with an insert-type ribbed groove according to the present invention; Figure 2 This is a full cross-sectional view of a large-scale edge-constrained spinning device with an insert-type ribbed groove according to the present invention; Figure 3 The invention relates to a large-scale edge-constrained spinning device with a block-type ribbed groove. Figure 2 A partial enlarged view of point A in the middle; Figure 4 This is a schematic top view of the insert frame structure of an insert-type large-scale edge-constrained spinning device with ribbed grooves according to the present invention; Figure 5 This is a schematic diagram of an insert frame structure of an insert-type large-scale edge-constrained spinning device with ribbed grooves according to the present invention, viewed from above; Figure 6This is a front structural diagram of an upper insert of an insert-type large-scale edge-constrained spinning device with ribbed grooves according to the present invention; Figure 7 This is a schematic diagram of the back structure of the upper insert of an insert-type large-scale edge-constrained spinning device with ribbed grooves according to the present invention; Figure 8 This is a front structural diagram of a lower insert of an insert-type large-scale edge-constrained spinning device with ribbed grooves according to the present invention; Figure 9 This is a schematic diagram of the back structure of the lower insert of an insert-type large-scale edge-constrained spinning device with ribbed grooves according to the present invention; Figure 10 It is a top view of a ring rib insert of an insert-type large-scale edge-constrained spinning device with rib grooves according to the present invention; Figure 11 This is a schematic structural diagram of a longitudinal reinforcement insert of an insert-type large-scale edge-constrained spinning device with rib grooves according to the present invention; Figure 12 This is a side view schematic diagram of a longitudinal reinforcement insert of an insert-type large-scale edge-constrained spinning device with rib grooves according to the present invention; Figure 13 This is a rear view schematic diagram of a longitudinal reinforcement insert of a large-scale edge-constrained spinning device with an insert type rib groove according to the present invention; Figure 14 This is a schematic structural diagram of a stripper plate of a large-scale edge-constrained spinning device with an insert type ribbed groove according to the present invention; Figure 15 It is a schematic structural diagram of a spinning component of a conical rotating body with external ribs produced by a large-scale edge-constrained spinning device with an insert type ribbed groove according to the present invention; Among them: 1-rotating wheel seat, 2-rotating wheel, 3-pressing ring, 4-longitudinal rib insert, 41-inserting groove, 5-circular rib insert, 51-upper insert, 52-lower insert, 53-die fastening screw hole, 54-longitudinal rib insert fastening screw hole, 55-circular rib insert fastening through hole, 56-circular rib insert fastening screw hole, 57-connecting ear 1, 58-connecting ear 2, 6-unloading plate, 7-die sleeve, 8-spun part with external rib, 81-outer flange, 82-web plate, 83-circular rib, 84-longitudinal rib. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present 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.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0023] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Specific implementation method 1: See Figures 1-15 The embodiment is described in detail. The large-scale edge-constrained spinning device with an insert type ribbed groove described in this embodiment specifically includes a spinning structure and a die. The spinning structure and the die cooperate to prepare a ribbed spun part 8. The ribbed spun part 8 includes an outer flange 81 and a web 82. The web 82 is conical. The outer flange 81 is arranged at the end with a larger opening of the web 82. A plurality of annular ribs 83 and a plurality of longitudinal ribs 84 are arranged on the outside of the web 82. The annular ribs 83 and the longitudinal ribs 84 form a mesh-like rib structure. The die includes a plurality of longitudinal rib inserts 4, a plurality of annular rib inserts 5, a stripper plate 6 and a die sleeve 7. The stripper plate 6 is arranged on the die sleeve. At the bottom inner side of the die 7, a lifting hole is provided on the discharge plate 6. The die sleeve 7 is a conical structure with a mesh groove on the inner wall and a blank holder 3 at the upper end, which secures the blank to the die sleeve 7. The longitudinal rib inserts 4 and the annular rib inserts 5 are connected to form a mesh insert frame structure and then set in the mesh groove. The longitudinal rib inserts 4 and the annular rib inserts 5 are provided with rib grooves for forming the ribs on the ribbed spun part 8. When the inserts are removed after forming, they are removed along the normal direction of the rib grooves. The cross-sectional shape of the rib grooves can be semicircular, rectangular, triangular, trapezoidal, or other shapes. The diameter of the original slab of the ribbed spun part 8 ranges from 300mm to 5000mm, and the plate thickness ranges from 2mm to 40mm.

[0025] The longitudinal rib insert 4 has a trapezoidal cross-section, wide at the top and narrow at the bottom, facilitating separation from the mold sleeve 7. The longitudinal rib insert 4 is provided with several mounting grooves 41, into which the annular rib insert 5 is centrally mounted. The annular rib insert 5 is provided with longitudinal rib fastening screw holes 54. The mounting grooves 41 are provided with through-holes that mate with these screw holes, securing the longitudinal and annular rib inserts 4 and 5 together via bolts. The angle α between the upper inner wall of the mounting groove 41 and the vertical direction is 1°-5°. This draft angle ensures smooth separation between the inserts and allows for smooth demolding of the spun part.

[0026] The rib grooves on the annular rib insert 5 are cross-shaped, and the vertical rib grooves in the cross-shaped rib grooves are connected to the rib grooves of the longitudinal rib insert 4, which are used to form the longitudinal ribs 84 on the ribbed spun part 8; the annular rib inserts 5 are circumferentially connected, and the transverse rib grooves in the cross-shaped rib grooves are connected end to end, which are used to form the annular ribs 83 on the ribbed spun part 8.

[0027] The annular reinforcement inserts 5 are connected to each other by connecting earrings; the connecting ear comprises a connecting ear 57 and a connecting ear 58 respectively provided at both ends of the annular reinforcement insert 5, the connecting ear 57 is provided on the back of the annular reinforcement insert 5, and the connecting ear 58 is provided on the front of the annular reinforcement insert 5, that is, the connecting ear 58 is on the side where the reinforcement groove is provided, such as Figure 9-10 As shown, the annular reinforcement insert 5 is Z-shaped when viewed from above; a annular reinforcement insert fastening through hole 55 is provided on the connecting ear 1 57, and a annular reinforcement insert fastening screw hole 56 is provided on the connecting ear 2 58; between two adjacent annular reinforcement inserts 5, the connecting ear 2 58 of one annular reinforcement insert 5 is pressed on the connecting ear 1 57 of the other annular reinforcement insert 5, so that the annular reinforcement insert fastening through hole 55 and the annular reinforcement insert fastening screw hole 56 are coaxial, and a bolt is threaded through the annular reinforcement insert fastening through hole 55 and the annular reinforcement insert fastening screw hole 56 to connect the two annular reinforcement inserts 5 end to end.

[0028] The annular rib insert 5 is also provided with a plurality of die fastening screw holes 53. After the plurality of longitudinal rib inserts 4 and the plurality of annular rib inserts 5 are connected to each other to form a mesh insert frame structure, the entire mesh insert frame structure and the die sleeve 7 are connected together through the plurality of die fastening screw holes 3 to prevent the inserts from moving relative to each other during the spinning process, thereby affecting the forming effect.

[0029] The annular rib insert 5 includes a plurality of upper inserts 51 and a plurality of lower inserts 52. The upper inserts 51 are connected end to end so that the rib grooves on them form an annular rib groove, and the lower inserts 52 are connected end to end so that the rib grooves on them form another annular rib groove, which are finally used to form two annular ribs 83 of the ribbed spun part 8.

[0030] The discharge tray 6 is a circular ring structure, and a raised structure is provided on the outer edge. The inclination angle of the inner surface of the raised structure is the same as that of the inner wall surface of the mold sleeve 7 and the surface of the longitudinal rib insert 4, so that the raised structure and the inner wall surface of the mold sleeve 7 and the surface of the longitudinal rib insert 4 are connected to form a smooth transition; a plurality of notches are provided on the inclined platform structure, and the lower end of the longitudinal rib insert 4 is inserted into the notch and contacts the surface of the discharge tray 6.

[0031] The spinning structure includes a roller seat 1 and a roller 2. The roller 2 is rotatably arranged on the roller seat 1 and is used for spinning the blank.

[0032] A method for spinning a tapered rotating body component with external ribs using the above-mentioned insert-type large-scale edge-constrained spinning device with rib grooves comprises the following steps: Step 1: Place the die sleeve 7 flat on a flat ground, install the stripper plate 6 on the die sleeve 7, assemble several longitudinal rib inserts 4 and several annular rib inserts 5 in order and according to the markings, assemble the inserts into a fixed frame structure, fasten the inserts with bolts, assemble the insert frame to the die sleeve 7, and fasten the frame and the die sleeve 7 with bolts; install the assembled die on the main shaft of the spinning machine, and install the roller 2 on the slide of the spinning machine through the roller seat 1; Step 2: After the die is preheated, the blank is clamped on the die with a blank holder 3, and multiple passes of edge-constrained spinning are performed to integrally form a thin-walled rotating body component with external reinforcing ribs; Step 3: After spinning is completed, remove the die and the spun part from the spinning machine together, place the die mouth upward on a flat ground, remove the bolts between the die sleeve 7 and the insert frame from the outside of the die, and use the lifting holes on the unloading plate 6 to lift the insert frame and the spun part out together to separate the die sleeve 7; Step 4: Remove the fastening bolts between the annular rib inserts 5 and the annular rib inserts 5, as well as the fastening bolts between the longitudinal rib inserts 4 and the annular rib inserts 5. First remove the longitudinal rib inserts 4, then remove the annular rib inserts 5, and remove them along the normal direction of the rib groove during removal, ultimately achieving overall demolding of the spun part with reinforcement ribs.

[0033] To summarize the above implementation cases, the present invention describes an insert-type large-scale edge-constrained spinning device with ribbed grooves and a spinning forming method. The die is composed of a die sleeve 7 and an insert. A plurality of longitudinal rib inserts 4 and a plurality of annular rib inserts 5 can form a mesh frame structure. There is no axial interference between the inserts and the die sleeve 7. During demolding, the spun part and the insert are separated from the die sleeve 7 as a whole through the unloading plate 6. Then, the inserts are disassembled one by one along the direction normal to the rib groove, so that the spun part and the insert are separated. This avoids the problem of difficulty in demolding caused by interference between the split mold and the rib structure of the spun part. The present invention describes an insert-type large-scale edge-constrained spinning device with ribbed grooves and a spinning forming method. The angle between the upper inner wall of the insert groove 41 of the longitudinal rib insert 4 and the vertical direction is 1°-5°. This draft angle ensures smooth separation between the inserts, and the spun part can be demolded smoothly.

[0034] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the invention. Reasonable combinations of the features described in the above embodiments are also possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A large-scale edge-constrained spinning device with a ribbed groove and an insert type, characterized by: The invention comprises a spinning structure and a die, wherein the spinning structure and the die cooperate to prepare a ribbed spun part (8); the die comprises a plurality of longitudinal rib inserts (4), a plurality of annular rib inserts (5), a stripper plate (6) and a die sleeve (7), wherein the stripper plate (6) is arranged at the inner bottom of the die sleeve (7); the die sleeve (7) is a conical structure, wherein a mesh groove is arranged on the inner wall, and a pressure ring (3) is arranged at the upper end; the longitudinal rib inserts (4) and the annular rib inserts (5) are connected to form a mesh frame structure and are arranged in the mesh groove; the longitudinal rib inserts (4) and the annular rib inserts (5) are provided with rib grooves.

2. The large-scale edge-constrained spinning device with an insert type ribbed groove according to claim 1, characterized in that: The longitudinal reinforcement insert (4) is provided with a plurality of inlay grooves (41), and the annular reinforcement insert (5) is centrally inlaid into the inlay groove (41).

3. The large-scale edge-constrained spinning device with an insert type ribbed groove according to claim 2, characterized in that: The angle between the upper inner wall of the inlay groove (41) and the vertical direction is 1°-5°.

4. The large-scale edge-constrained spinning device with an insert type ribbed groove according to claim 2, characterized in that: The rib grooves on the annular rib insert (5) are cross-shaped, and the vertical rib grooves in the cross-shaped rib grooves are connected to the rib grooves of the longitudinal rib insert (4).

5. The large-scale edge-constrained spinning device with an insert type ribbed groove according to claim 4, characterized in that: The annular reinforcement inserts (5) are connected by connecting ears; the connecting ears include a connecting ear 1 (57) and a connecting ear 2 (58) respectively arranged at both ends of the annular reinforcement insert (5), the connecting ear 1 (57) is arranged on the back of the annular reinforcement insert (5), and the connecting ear 2 (58) is arranged on the front of the annular reinforcement insert (5); the connecting ear 1 (57) is provided with an annular reinforcement insert fastening through hole (55), and the connecting ear 2 (58) is provided with an annular reinforcement insert fastening screw hole (56).

6. The large-scale edge-constrained spinning device with an insert type ribbed groove according to claim 5, characterized in that: The annular reinforcement insert (5) is provided with a longitudinal reinforcement insert fastening screw hole (54), and the inlay groove (41) is provided with a through hole that cooperates with the longitudinal reinforcement insert fastening screw hole (54).

7. The large-scale edge-constrained spinning device with an insert type ribbed groove according to claim 6, characterized in that: The annular rib insert (5) is connected to the die sleeve (7) via a plurality of die fastening screw holes (53).

8. The large-scale edge-constrained spinning device with an insert type ribbed groove according to claim 7, characterized in that: The ring reinforcement insert (5) comprises a plurality of upper inserts (51) and a plurality of lower inserts (52).

9. The large-scale edge-constrained spinning device with an insert type ribbed groove according to any one of claim 8, characterized in that: The spinning structure comprises a roller seat (1) and a roller (2), wherein the roller (2) is rotatably arranged on the roller seat (1).

10. A method for spinning a tapered rotating body component with external ribs using the large-scale edge-constrained spinning device with an insert type ribbed groove according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Place the die sleeve (7) flat on a flat surface, install the stripper plate (6), assemble the longitudinal rib insert (4) and the annular rib insert (5) into a frame structure and assemble it onto the die sleeve (7); install the assembled die onto the main shaft of the spinning machine; Step 2: After the die is preheated, the blank is clamped on the die with a blank holder (3), and multiple passes of edge-constrained spinning are performed to integrally form a thin-walled rotating body component with outer reinforcing ribs; Step 3: After the spinning is completed, the die and the rotating body are disassembled together, the spinning device is placed on a flat ground with the mouth facing upwards, and the insert frame and the rotating body are lifted out together using the lifting holes on the unloading plate (6) to separate the die sleeve (7); Step 4: first remove the longitudinal reinforcement insert (4), then remove the annular reinforcement insert (5), and then remove them along the normal direction of the reinforcement groove to achieve the overall demoulding of the spun part with reinforcement ribs.

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