A large edge-restrained spinning device with a split die and a spinning forming method

Abstract

This invention discloses a block-type large-scale edge-constrained spinning device and spinning forming method with ribs and grooves, belonging to the field of spinning manufacturing technology, and solving the problem of difficult demolding in the preparation device of conical rotating components with external ribs. The invention includes a spinning structure and a die, which work together to prepare ribbed spun parts. The die includes several longitudinal rib inserts, several annular rib inserts, a stripper plate, and a die sleeve. The stripper plate is located at the bottom inner side of the die sleeve. The die sleeve has a conical structure with a mesh groove on its inner wall and a pressure ring at its upper end. The longitudinal rib inserts and annular rib inserts are connected to form a mesh frame structure and then placed in the mesh groove. Rib grooves are provided on the longitudinal rib inserts and annular rib inserts. The die of this invention consists of two parts: a die sleeve and inserts. The inserts are provided with rib grooves for forming the ribs of the spun parts. During demolding, the inserts and the spun parts separate from the die sleeve together. Then, the inserts are disassembled one by one along the normal direction of the rib grooves to separate the spun parts from the inserts.

Description

Technical Field

[0001] This invention relates to the field of spinning manufacturing technology, specifically to a large edge-constrained spinning device with insert-type grooves and a spinning forming method. Background Technology

[0002] The integrated manufacturing of complex thin-walled components is an effective way to achieve the scaling up and lightweighting of aerospace equipment. Currently, many key load-bearing components in aerospace are designed as large thin-walled rotating structures, often with features such as local stiffeners, but how to achieve efficient integrated manufacturing of these components has always been a challenge.

[0003] Spinning is commonly used for integral forming of thin-walled rotary components, offering advantages such as high efficiency, low cost, and good flexibility. Edge-constrained spinning involves fixing the edges of a rotating blank and progressively loading it from the edges towards the center using a spinning wheel. This causes the blank to gradually transform into a thin-walled rotary component under the action of the wheel's predetermined trajectory. For large-sized thin-walled bottom-sealed structures, edge-constrained spinning technology can significantly improve blank rigidity, avoid the problem of edge instability and wrinkling during spinning, and enable the integral forming of thin-walled rotary components with flanges and large depth-to-diameter ratios.

[0004] For large-sized thin-walled rotary components with external reinforcing ribs, integral forming can be effectively achieved using a spinning die with rib grooves. To ensure smooth demolding of the ribbed component, the die needs to be designed with a segmented or insert structure. In the prior art, there are devices that use segmented dies with rib grooves to spin-form tapered rotary components with external ribs. However, when this device is used to prepare rotary components, the rib groove area of ​​the die is filled with the workpiece metal. For reinforcing ribs with rectangular, trapezoidal, or semi-circular cross-sections, the ribs of the workpiece and the rib grooves of the die will interfere axially, leading to difficulties in demolding. Summary of the Invention

[0005] To address the aforementioned problem of difficult demolding in existing fabrication devices for conical rotating components with external ribs, this invention proposes a block-type large-scale edge-constrained spinning device with rib grooves and a spinning forming method. The die of this invention consists of a die sleeve and inserts. The inserts are provided with rib grooves for forming the ribs of the spun part. During demolding, the inserts and the spun part separate from the die sleeve together. Then, the inserts are disassembled one by one to separate the spun part from the inserts.

[0006] This invention proposes a block-type large edge-constrained spinning device with ribs and grooves, which specifically includes a spinning structure and a die. The spinning structure and the die work together to prepare ribbed spun parts. The die includes several longitudinal rib inserts, several annular rib inserts, a stripper plate, and a die sleeve. The stripper plate is located at the bottom inner side of the die sleeve. The die sleeve has a conical structure with a mesh groove on its inner wall and a pressure ring at its upper end. The longitudinal rib inserts and annular rib inserts are connected to form a mesh frame structure and then placed in the mesh groove. Rib grooves are provided on the longitudinal rib inserts and annular rib inserts.

[0007] Furthermore, the longitudinal rib insert is provided with several inlay grooves, and the annular rib insert is inlaid into the inlay groove in the center.

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

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

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

[0011] Furthermore, the ring rib insert is provided with longitudinal rib insert fastening screw holes, and the inlay groove is provided with through holes that cooperate with the longitudinal rib insert fastening screw holes.

[0012] Furthermore, the ring rib insert is connected to the die by several concave die fastening screw holes and die sleeves.

[0013] Furthermore, the ring rib insert includes several upper inserts and several lower inserts.

[0014] Furthermore, the spinning structure includes a spinning wheel base and a spinning wheel, with the spinning wheel rotatably mounted on the spinning wheel base.

[0015] A constrained spinning forming method for a conical rotating component with external ribs using the above-mentioned insert-type grooved edge-constrained spinning device, characterized by comprising the following steps: Step 1: Place the die sleeve flat on a flat surface, install the stripper plate, assemble the longitudinal rib inserts and ring rib inserts into a frame structure and assemble them onto the die sleeve; install the assembled die onto the spindle of the spinning machine. Step 2: After the die is preheated, the blank is clamped on the die using a pressure ring and subjected to multi-pass edge-constrained spinning forming to form a thin-walled rotating 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 opening facing up on a flat ground. 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 four: First, remove the longitudinal rib inserts, then remove the ring rib inserts, and remove them along the normal direction of the rib grooves to achieve overall demolding of the spun part with reinforcing ribs.

[0016] The beneficial effects of the insert-type large edge-constrained spinning device and spinning method with rib grooves described in this invention are as follows: (1) The present invention provides a large edge-constrained spinning device and spinning forming method with insert type with rib groove. The die is composed of two parts: a die sleeve and inserts. Several longitudinal rib inserts and several ring rib inserts can form a mesh frame structure. There is no axial interference between the inserts and the die sleeve. When demolding, the spinning part and the insert are removed from the die sleeve together by the stripper plate. Then the inserts are disassembled one by one along the normal direction of the rib groove, so that the spinning part and the insert are separated. This avoids the problem of difficulty in demolding caused by interference between the split die and the rib structure of the spinning part.

[0017] (2) The large edge-constrained spinning device and spinning forming method of the insert type with rib groove described in this invention have an angle of 1°-5° between the inner wall of the upper side of the slot of the longitudinal rib insert and the vertical direction. This draft angle ensures that the inserts can be separated smoothly and the spun parts can be demolded smoothly. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a large edge-constrained spinning device with insert-type grooved ribs according to the present invention; Figure 2 This is a full sectional view of a large edge-constrained spinning device with insert-type grooved ribs as described in this invention; Figure 3 This invention relates to a block-type large edge-constrained spinning device with ribbed grooves. Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a top view of the insert frame structure of a large edge-constrained spinning device with insert grooves according to the present invention. Figure 5 This is a bottom view of the insert frame structure of a large edge-constrained spinning device with insert grooves according to the present invention. Figure 6This is a front view of the upper insert of a large edge-constrained spinning device with rib grooves as described in this invention. Figure 7 This is a schematic diagram of the back structure of the upper insert of a large edge-constrained spinning device with rib grooves as described in this invention. Figure 8 This is a front view of the lower insert of a large edge-constrained spinning device with rib grooves as described in this invention. Figure 9 This is a schematic diagram of the back structure of the lower insert of a large edge-constrained spinning device with rib grooves as described in this invention. Figure 10 This is a top view of the ring rib insert of a large edge-constrained spinning device with insert-type grooved ribs, as described in this invention. Figure 11 This is a schematic diagram of the longitudinal rib insert of a large edge-constrained spinning device with insert-type grooved ribs, as described in this invention. Figure 12 This is a side view of the longitudinal rib insert of a large edge-constrained spinning device with rib grooves as described in this invention. Figure 13 This is a rear view schematic diagram of the longitudinal rib insert of a large edge-constrained spinning device with rib grooves according to the present invention. Figure 14 This is a schematic diagram of the unloading plate of a large edge-constrained spinning device with insert-type grooved ribs, as described in this invention. Figure 15 This is a schematic diagram of the structure of a cone-shaped rotating component with external ribs prepared by a large edge-constrained spinning device with insert-type grooved ribs according to the present invention. Wherein: 1-Spinning wheel seat, 2-Spinning wheel, 3-Pressure ring, 4-Longitudinal rib insert, 41-Inlay groove, 5-Ring rib insert, 51-Upper insert, 52-Lower insert, 53-Die fastening screw hole, 54-Longitudinal rib insert fastening screw hole, 55-Ring rib insert fastening through hole, 56-Ring rib insert fastening screw hole, 57-Connecting ear one, 58-Connecting ear two, 6-Unloading plate, 7-Die sleeve, 8-Spinning part with external rib, 81-Outer flange, 82-Web plate, 83-Ring rib, 84-Longitudinal rib. Detailed Implementation

[0020] The technical solution of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of, and not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0021] 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 this 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 this 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 this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Furthermore, the technical features involved in the 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 one: See Figures 1-15 This embodiment is described in detail. The large edge-constrained spinning device with insert-type ribbed grooves described in this embodiment specifically includes a spinning structure and a die. The spinning structure and the die work together 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, and the outer flange 81 is located at the end of the web 82 with a larger opening. Several annular ribs 83 and several longitudinal ribs 84 are provided on the outer side of the web 82, forming a mesh-like rib structure. The die includes several longitudinal rib inserts 4, several annular rib inserts 5, a stripper plate 6, and a die sleeve 7. The stripper plate 6 is located within the die sleeve. The bottom inner side of the die sleeve 7 has a lifting hole on the unloading plate 6; the die sleeve 7 has a conical structure with a mesh groove on the inner wall and a pressure ring 3 at the upper end, which fixes the blank to the die sleeve 7; the longitudinal rib insert 4 and the ring rib insert 5 are connected to form a mesh insert frame structure and are placed in the mesh groove; the longitudinal rib insert 4 and the ring rib insert 5 have rib grooves for forming the ribs on the ribbed spinning part 8. When the insert is removed after forming, it is removed along the normal direction of the rib groove; the cross-sectional shape of the rib groove is semi-circular, rectangular, triangular, trapezoidal, etc. The diameter of the original blank of the ribbed spinning part 8 is 300mm-5000mm and the thickness is 2mm-40mm.

[0025] The longitudinal rib insert 4 has a trapezoidal cross-section, wider at the top and narrower at the bottom, facilitating separation from the mold sleeve 7. The longitudinal rib insert 4 has several inlay grooves 41, into which the annular rib insert 5 is centrally inlaid. The annular rib insert 5 has longitudinal rib insert fastening screw holes 54, and the inlay groove 41 has through holes that mate with the longitudinal rib insert fastening screw holes 54. The longitudinal rib insert 4 and the annular rib insert 5 are fixed together by bolts. The angle α between the upper inner wall of the inlay groove 41 and the vertical direction is 1°-5°. This draft angle ensures smooth separation between the inserts, allowing the spun part to be easily demolded.

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

[0027] The annular rib inserts 5 are connected in a ring-shaped manner by connecting ears; the connecting ears include connecting ear one 57 and connecting ear two 58 respectively disposed at both ends of the annular rib insert 5. Connecting ear one 57 is disposed on the back of the annular rib insert 5, and connecting ear two 58 is disposed on the front of the annular rib insert 5, that is, connecting ear two 58 is located on the side where the rib groove is disposed, such as Figures 9-10 As shown, the ring rib insert 5 is Z-shaped when viewed from above; the connecting ear 1 57 is provided with a ring rib insert fastening through hole 55, and the connecting ear 2 58 is provided with a ring rib insert fastening screw hole 56; between two adjacent ring rib inserts 5, the connecting ear 2 58 of one ring rib insert 5 presses on the connecting ear 1 57 of the other ring rib insert 5, so that the ring rib insert fastening through hole 55 and the ring rib insert fastening screw hole 56 are coaxial, and the bolt passes through the ring rib insert fastening through hole 55 and the ring rib insert fastening screw hole 56 for threaded connection, connecting the two ring rib inserts 5 end to end together.

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

[0029] The ring rib insert 5 includes several upper inserts 51 and several lower inserts 52. The upper inserts 51 are connected end to end so that the rib grooves on them form a ring rib groove. The lower inserts 52 are connected end to end so that the rib grooves on them form another ring rib groove. Finally, they are used to form two ring ribs 83 of the ribbed spinning part 8.

[0030] The unloading disc 6 has a circular structure with a raised structure 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. Several 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 unloading disc 6.

[0031] The spinning structure includes a spinning wheel seat 1 and a spinning wheel 2. The spinning wheel 2 is rotatably mounted on the spinning wheel seat 1 and is used to spin the blank.

[0032] A spinning forming method for a tapered rotating component with external ribs using the above-mentioned insert-type grooved edge-constrained spinning device includes the following steps: Step 1: Place the die sleeve 7 flat on a flat surface, install the unloading plate 6 onto the die sleeve 7, assemble several longitudinal rib inserts 4 and several annular rib inserts 5 in sequence and according to the markings, assemble the inserts into a fixed frame structure, and fasten the inserts together with bolts. Assemble this insert frame onto the die sleeve 7, and fasten the frame and the die sleeve 7 together with bolts. Install the assembled die onto the spindle of the spinning machine, and install the spinning wheel 2 onto the spinning machine carriage through the spinning wheel seat 1. Step 2: After the die is preheated, the blank is clamped on the die using the pressure ring 3 and multi-pass edge-constrained spinning is performed to form a thin-walled rotating 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 with the opening facing up on a flat ground. Remove the bolts between the die sleeve 7 and the insert frame from the outside of the die. Use the lifting holes on the stripper plate 6 to lift the insert frame and the spun part together to separate the die sleeve 7. Step 4: Remove the fastening bolts between the ring rib insert 5 and the ring rib insert 5, as well as the fastening bolts between the longitudinal rib insert 4 and the ring rib insert 5. First, remove the longitudinal rib insert 4, and then remove the ring rib insert 5. When removing, remove along the normal direction of the rib groove to finally achieve the overall demolding of the spun part with reinforcing ribs.

[0033] In summary, the present invention provides a block-type large edge-constrained spinning device and spinning method with rib grooves. The die consists of a die sleeve 7 and inserts. Several longitudinal rib inserts 4 and several 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 inserts are detached from the die sleeve 7 together via the stripper plate 6. Then, the inserts are disassembled one by one along the rib groove normal direction, allowing the spun part and inserts to separate, thus avoiding the problem of difficult demolding caused by interference between the segmented die and the rib structure of the spun part. In the block-type large edge-constrained spinning device and spinning method of the present invention, 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, allowing the spun part to be easily demolded.

[0034] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the invention. They can also be reasonable combinations of the features described in the above embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large edge-constrained spinning device with insert-type grooved ribs, characterized in that: The spun structure and the die are used together to prepare ribbed spun parts (8); the die includes several longitudinal rib inserts (4), several ring rib inserts (5), a stripper plate (6) and a die sleeve (7), the stripper plate (6) is set at the bottom of the inner side of the die sleeve (7); the die sleeve (7) is a conical structure with a mesh groove on the inner wall and a pressure ring (3) at the upper end; the longitudinal rib inserts (4) and the ring rib inserts (5) are connected to form a mesh frame structure and then set in the mesh groove; the longitudinal rib inserts (4) and the ring rib inserts (5) are provided with rib grooves; The longitudinal rib insert (4) is provided with several inlay grooves (41), and the annular rib insert (5) is inlaid in the inlay grooves (41) in the center.

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

3. The insert-type large edge-constrained spinning device with ribbed grooves according to claim 1, characterized in that: The groove on the ring reinforcement block (5) is cross-shaped, and the vertical groove in the cross-shaped groove is connected to the groove of the longitudinal reinforcement block (4).

4. The insert-type large edge-constrained spinning device with ribbed grooves according to claim 3, characterized in that: The ring rib inserts (5) are connected by connecting ears; the connecting ears include connecting ear one (57) and connecting ear two (58) respectively disposed at both ends of the ring rib insert (5), connecting ear one (57) is disposed on the back of the ring rib insert (5), and connecting ear two (58) is disposed on the front of the ring rib insert (5); connecting ear one (57) is provided with a ring rib insert fastening through hole (55), and connecting ear two (58) is provided with a ring rib insert fastening screw hole (56).

5. The insert-type large edge-constrained spinning device with ribbed grooves according to claim 4, characterized in that: The ring rib insert (5) is provided with a longitudinal rib insert fastening screw hole (54), and the inlay groove (41) is provided with a through hole that cooperates with the longitudinal rib insert fastening screw hole (54).

6. The insert-type large edge-constrained spinning device with ribbed grooves according to claim 5, characterized in that: The ring rib insert (5) is connected to the mold sleeve (7) by several concave die fastening screw holes (53).

7. The insert-type large edge-constrained spinning device with ribbed grooves according to claim 6, characterized in that: The ring reinforcement insert (5) includes several upper inserts (51) and several lower inserts (52).

8. The insert-type large edge-constrained spinning device with ribbed grooves according to any one of claims 7, characterized in that: The spinning structure includes a spinning wheel seat (1) and a spinning wheel (2), with the spinning wheel (2) rotatably mounted on the spinning wheel seat (1).

9. A spinning forming method for a conical rotating component with external ribs using the insert-type ribbed grooved large edge-constrained spinning device as described in any one of claims 1-8, characterized in that: Includes the following steps: Step 1: Place the mold sleeve (7) flat on a flat ground, install the unloading plate (6), assemble the longitudinal rib insert (4) and the ring rib insert (5) into a frame structure and assemble them onto the mold sleeve (7); install the assembled die onto the spindle of the spinning machine; Step 2: After the die is preheated, the blank is clamped on the die using the pressure ring (3) and multi-pass edge constraint spinning is performed to form a thin-walled rotating component with outer reinforcing ribs. Step 3: After completing the spinning process, disassemble the die and the rotating body component together. Place the spinning device with the opening facing up on a flat surface. Use the lifting holes on the unloading plate (6) to lift the insert frame and the rotating body component together to separate the die sleeve (7). Step 4: First, remove the longitudinal rib insert (4), then remove the ring rib insert (5), and remove it along the normal direction of the rib groove to achieve overall demolding of the spun part with reinforcing ribs.

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