An apparatus for manufacturing convex ribs on the inner wall of a cylindrical member

Abstract

The present disclosure provides an apparatus for manufacturing a convex rib on an inner wall of a cylindrical piece, the apparatus comprising: a rotating member configured to be rotatable about a rotation axis; a clamping mechanism configured to rotate with the rotating member and for clamping the cylindrical piece such that a longitudinal axis of the cylindrical piece is collinear with the rotation axis; a machining device for performing electric arc addition on the inner wall of the cylindrical piece and rolling the added material to obtain the convex rib, the machining device being configured to be movable in an axial direction of the clamped cylindrical piece.

Description

Technical Field

[0001] This disclosure relates to the field of mechanical component manufacturing, and more particularly to an apparatus for manufacturing ribs on the inner wall of a cylindrical component. Background Technology

[0002] Cylindrical components with ribs on their inner walls play a crucial role in modern industry, especially in the manufacture of main structural components for spacecraft. Due to their unique structural design, these components provide additional strength and rigidity, thus exhibiting superior performance under high pressure, high temperature, and complex mechanical loads. In the aerospace field, these components are commonly used in critical locations such as rocket engine casings, satellite support structures, and space station connection components; their performance directly affects the safety and reliability of spacecraft.

[0003] Additive manufacturing technology, particularly arc additive manufacturing, has become an effective means of manufacturing complex structural components. This technology, through layer-by-layer material stacking, allows for precise control over the geometry and internal structure of components, including the formation of ribs on the inner walls of cylindrical parts. Arc additive manufacturing uses an electric arc as a heat source to melt metal wire and deposit it layer by layer onto a substrate to form the desired three-dimensional structure. This method not only achieves efficient material utilization and reduces waste during manufacturing, but also provides the ability to design and manufacture complex geometries. During arc additive manufacturing, the shape and size of the molten pool can be controlled by adjusting arc parameters, wire feed speed, and deposition path, thereby precisely controlling the formation of ribs. Furthermore, subsequent heat treatment and machining can further optimize the microstructure and mechanical properties of the components to meet specific application requirements.

[0004] While arc additive manufacturing technology has made significant progress in fabricating cylindrical parts with complex internal wall structures, several limitations remain. One of the most significant issues is that current additive manufacturing techniques are primarily suited for flat components, and directly forming ribs on the inner walls of cylindrical parts remains challenging. Furthermore, the rapid melting and solidification during additive manufacturing can lead to the formation of coarse dendrites, which can weaken the mechanical properties of the component, especially under tensile or impact loads. In addition, rapid solidification can introduce solidification defects such as pores and cracks, affecting the overall strength and reliability of the component. Moreover, the unique microstructure of additively manufactured materials results in significant anisotropy, and the large residual stress within the additively manufactured component leads to deformation and cracking, as well as a predisposition to internal cracks and voids. Therefore, materials produced by arc additive manufacturing typically require plastic deformation to refine grains, optimize microstructure, reduce defects, and improve material uniformity and mechanical properties. Taking the use of rolling as a precision forming technology to further refine metal grains, introduce a residual compressive stress layer, reduce surface roughness, and improve the wear resistance, corrosion resistance, and fit of workpiece surfaces as an example, for cylindrical parts, the challenges lie in: the need to apply precise pressure during the rolling process to ensure the uniformity of the ribs while avoiding excessive deformation or material damage; the need for special tooling and equipment for rolling the inner wall of cylindrical parts to ensure that the rolling tool can reach the inner wall and perform effective rolling; and the need for precise planning of the rolling path to ensure the uniformity and consistency of the ribs, in order to avoid uneven deformation of the material. These challenges make the inner wall rolling of cylindrical parts a technical challenge. Moreover, when performing additive manufacturing on the inner wall of cylindrical parts, the control of the heat-affected zone becomes more complex, which may lead to uneven distribution of material properties; when forming ribs on the inner wall, precision control and surface roughness optimization become more difficult, especially in the manufacturing of large-size parts. In particular, for large-sized cylindrical parts, there are challenges in global temperature control and precise control of the movement speed and spatial position of each component. Specifically, large-sized cylindrical parts inevitably face significant temperature differences during the forming process, leading to high thermal stress, poor interlayer bonding, and poor uniformity. Temperature control is crucial for ensuring the quality and performance of the ribs. Uneven temperature gradients can cause inhomogeneity in material properties, affecting the reliability and durability of the components. To form ribs with specific helix angles, precise control of the movement speed and spatial position of each component is necessary. This is critical for ensuring the geometric accuracy and performance of the ribs; any deviation can lead to shape deviations, affecting their structural strength and function. Therefore, although arc additive manufacturing technology has potential in manufacturing cylindrical parts with ribs, current technologies and methods still require further improvement and optimization to overcome the above challenges and achieve the goal of efficiently and accurately forming ribs on the inner wall of cylindrical parts. Summary of the Invention

[0005] To address the aforementioned technical problems, this disclosure aims to provide an apparatus for manufacturing ribs on the inner wall of a cylindrical component, providing an efficient, precise, and reliable method for manufacturing high-performance ribs on the inner wall of the cylindrical component, thus meeting the demands of modern industry for high-performance cylindrical components.

[0006] The technical solution disclosed herein is implemented as follows: This disclosure provides an apparatus for manufacturing ribs on the inner wall of a cylindrical component, the apparatus comprising: A rotating member configured to rotate about a rotation axis; A clamping mechanism configured to rotate with the rotating member and for clamping the cylindrical member such that the longitudinal axis of the cylindrical member is collinear with the axis of rotation; A processing apparatus for performing arc additive manufacturing on the inner wall of the cylindrical member and rolling the added material to obtain the rib, the processing apparatus being configured to move axially in the clamped cylindrical member.

[0007] The rotating component allows the cylindrical part to rotate, avoiding complex circumferential movement of the machining device, reducing mechanical load, and improving machining flexibility and efficiency. The clamping mechanism securely holds the cylindrical part, eliminating the need for additional support structures and allowing ribs to be manufactured directly on the inner wall, improving efficiency and reducing material waste and post-processing. The machining device's axial movement capability, combined with the arc additive manufacturing unit and the rolling unit, ensures uniform rib consistency, improving machining accuracy and mechanical properties. Attached Figure Description

[0008] Figure 1 This is a perspective view of a cylindrical component with ribs on its inner wall manufactured according to an embodiment of the present disclosure. Figure 2 This is a perspective view of a cylindrical component with ribs on its inner wall according to another embodiment of the present disclosure; Figure 3 This is a perspective view of an apparatus for manufacturing ribs on the inner wall of a cylindrical component according to an embodiment of the present disclosure. Figure 4 This is a perspective view of the radial clamping unit and rotating member combined in a clamping mechanism for an apparatus for manufacturing ribs on the inner wall of a cylindrical part according to an embodiment of the present disclosure. Figure 5 This is an enlarged perspective view of a radial clamping unit of a clamping mechanism for an apparatus for manufacturing ribs on the inner wall of a cylindrical component according to an embodiment of the present disclosure. Figure 6 This is a perspective view of a lifting mechanism for an apparatus for manufacturing ribs on the inner wall of a cylindrical component according to an embodiment of the present disclosure. Detailed Implementation

[0009] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0010] In modern industry, particularly in the manufacturing of main structural components for spacecraft, cylindrical components with ribs on their inner walls are crucial due to their ability to provide additional strength and rigidity. These components exhibit exceptional performance under high pressure, high temperature, and complex mechanical loads, and are widely used in critical locations such as rocket engine casings, satellite support structures, and space station connection components. However, while additive manufacturing technologies, especially arc additive manufacturing, provide an effective means of manufacturing such complex structural components, several challenges remain in manufacturing cylindrical components with intricate internal wall structures.

[0011] Arc additive manufacturing technology allows for precise control over the geometry and internal structure of components, including the formation of ribs on the inner walls of cylindrical parts, by stacking materials layer by layer. This process uses an electric arc as a heat source to melt metal wire and deposit it layer by layer onto a substrate to form the desired three-dimensional structure. While this method enables efficient material utilization and reduces waste during manufacturing, several technical challenges arise when directly forming ribs on the inner walls of cylindrical parts. The main problems include the complexity of heat-affected zone control, the need for additional support structures, difficulties in precision control and surface roughness optimization, and the challenge of obtaining high-quality ribs, especially in the manufacture of large-sized components.

[0012] These issues indicate that while arc additive manufacturing technology theoretically has the potential to fabricate ribbed cylindrical components, current techniques and methods still require further improvement and optimization in practical operation. To overcome these challenges and achieve the goal of efficiently and precisely forming high-performance ribs on the inner walls of cylindrical components, see [link to relevant documentation]. Figures 1 to 3 This disclosure provides an apparatus 1 for manufacturing a rib R on the inner wall IW of a cylindrical member B, wherein in Figure 1 and Figure 2 The image shows a cylindrical part B with raised ribs R fabricated on its inner wall IW. Figure 3 Device 1 is shown in the image; more specifically, in... Figure 1 In the middle, the ribs R extend along the circumferential and axial directions of the cylindrical part B, respectively. Figure 2 In the middle, the rib R extends both circumferentially and axially along the cylindrical member B, as shown in... Figure 3 As shown, the device 1 may include: Rotating member 10, the rotating member 10 being configured to rotate around as shown in Figure 3The rotation axis RA, shown by the dashed line, rotates. Additionally, there can be two rotating members 10, each located at one of the two axial ends of the cylindrical member B. Figure 3 Only one rotating component 10 is shown in the diagram; Clamping mechanism 20, configured to rotate with rotating member 10 and for clamping cylindrical member B such that, as in Figure 3 Similarly, the longitudinal axis LA of the cylindrical component B, shown by a dashed line, is collinear with the rotation axis RA of the rotating component 10. When there are two rotating components 10, the number of clamping mechanisms 20 can also be correspondingly two, as shown in... Figure 3 As shown in the image; Processing apparatus 30, which is used to perform arc additive manufacturing on the inner wall IW of cylindrical member B and roll the added material to obtain, as in Figure 1 and Figure 2 The rib R shown in the figure indicates that the processing device 30 is configured to move axially along the clamped cylindrical part B, more specifically as shown in Figure 3 As shown, the processing device 30 may include an arc additive manufacturing unit 31, a rolling unit 32, and a support 33. The arc additive manufacturing unit 31 may include a robotic arm and a welding rod disposed at the end of the robotic arm. The rolling unit 32 may include rollers and a pressing mechanism, such as a hydraulic pressing mechanism, for pressing the rollers against the added material to provide greater pressure. The support 33 is used to guide the rolling unit 32 to move axially along the clamped cylindrical part B. That is, the movement of the processing device 30 specifically refers to the movement of the end of the robotic arm and the movement of the rolling unit 32, while the support 33 can remain fixed.

[0013] For manufacturing such Figure 1 Regarding the rib R shown, the machining device 30 can be kept stationary while the rotating member 10 is rotated, thereby obtaining a rib R extending circumferentially along the cylindrical member B. Then, the rotating member 10 can be kept stationary while the machining device 30 is moved, thereby obtaining a rib R extending axially along the cylindrical member B. For manufacturing such... Figure 2 As shown in the figure, the rib R can be rotated while the processing device 30 is moved, thereby obtaining a rib R that extends circumferentially along the cylindrical member B and also axially along the cylindrical member B.

[0014] Since the cylindrical part B can rotate via the rotating member 10, the processing device 30 does not need to perform complex and difficult circumferential movements along the cylindrical part B. This design significantly simplifies the processing because the manufacturing of the rib R can be achieved by rotating the cylindrical part B, rather than requiring complex movements of the processing device 30. This design reduces the mechanical load on the robotic arm and rolling unit, lowers the risk of equipment failure, and improves processing flexibility and efficiency. Because the cylindrical part B is stably held by the clamping mechanism 20, the rib R can be directly manufactured on the inner wall of the cylindrical part without additional support structures. The design of the clamping mechanism 20 ensures the stability of the cylindrical part B during processing, maintaining its position and orientation even under the large rolling pressure applied by the processing device 30. This direct manufacturing method not only improves the efficiency of the manufacturing process but also reduces potential quality problems caused by support structures, such as unnecessary material waste and the extra work required to remove the support structure after processing. The processing device 30 is able to move axially along the clamped cylindrical part B, which means that the manufacturing of the rib R can be precisely controlled along the entire length of the cylindrical part B. The coordinated work of the arc additive manufacturing unit 31 and the rolling unit 32 ensures the uniformity and consistency of the rib R, thereby improving the processing accuracy of the final product. Specifically, the arc additive manufacturing unit 31 includes a robotic arm and a welding electrode disposed at the end of the robotic arm for performing arc additive manufacturing on the inner wall IW of the cylindrical part B. This technology is efficient because it can precisely deposit material layer by layer to form the desired rib R, while achieving efficient material utilization. The rolling unit 32 includes rollers and a pressing mechanism for pressing the rollers against the added material, such as a hydraulic pressing mechanism to provide greater pressure. The rolling technology can not only refine the metal grains and introduce a residual compressive stress layer, but also reduce surface roughness, improve the wear resistance, corrosion resistance and fit of the workpiece surface, and provide high-performance characteristics of the rib. The bracket 33 is used to guide the rolling unit 32 to move axially in the clamped cylindrical part B. The bracket 33 remains fixed, providing accuracy and reliability in the processing and ensuring the uniformity and consistency of the rib R. Due to the rotation of the cylindrical part B and the axial movement of the processing device 30, this disclosure allows for continuous and automated processing, thereby significantly improving production efficiency. Furthermore, the reduced need for support structures simplifies post-processing and cleaning, further lowering production costs. The integrated control system coordinates the arc additive manufacturing and rolling operations, ensuring stability during processing. This collaborative mechanism guarantees precise coordination between the arc additive manufacturing and rolling steps, improving processing quality and efficiency. By integrating the rotational capability of the rotating component 10, the stability of the clamping mechanism 20, the high efficiency of the arc additive manufacturing unit 31, the high performance characteristics of the rolling unit 32, and the precision and reliability of the support 33, the complementary advantages of these technologies collectively achieve the goal of high-performance integral forming manufacturing of thin-walled cylindrical parts with internal ribs.In summary, this disclosure not only solves the problems existing in the prior art, but also provides an efficient, accurate and reliable method for manufacturing high-performance ribs on the inner wall of cylindrical parts, thereby meeting the needs of modern industry for high-performance cylindrical parts.

[0015] In particular, addressing the challenge of rolling large cylindrical parts B, this embodiment employs a precise pressure control mechanism to ensure uniformity of the ribs R and prevent excessive deformation or material damage. Specifically, the rolling unit 32 includes rollers and a pressing mechanism, such as a hydraulic pressing mechanism, to press the rollers against the added material, providing greater pressure. Precise control of the hydraulic system allows adjustment of the roller pressure on the material, ensuring uniform pressure distribution during rolling and thus achieving uniformity of the ribs R. This pressure control mechanism allows for pressure adjustment at different processing stages to accommodate varying material properties and processing requirements. To address the specific requirements of rolling the inner wall IW of the cylindrical part B, the rolling unit 32 in this solution is configured to move axially within the clamped cylindrical part B. Furthermore, the design of the rotating member 10 allows the cylindrical part B to rotate about the rotation axis RA. This eliminates the need for complex circumferential movement by the rolling unit 32; instead, the ribs R are manufactured through the rotation of the cylindrical part B. This design significantly simplifies the processing and reduces the complexity of tooling and equipment requirements. Precise planning of the rolling path is crucial in ensuring the uniformity and consistency of the rib R. The processing apparatus 30 in this technical solution includes a rolling unit 32 and a support 33, where the support 33 guides the rolling unit 32 to move axially along the clamped cylindrical part B. By guiding the rolling unit 32 with the support 33, the rolling path of the rolling unit 32 relative to the rotating cylindrical part B can be more precise, ensuring uniform movement of the rolling unit 32 along the axial direction of the cylindrical part B and avoiding uneven material deformation. This precise path planning and control ensures accurate control of the movement speed and spatial position of each component, making the manufacturing process of the rib R more precise and efficient, ensuring that ribs with specific helix angles can be formed as required. Since the manufacturing of the rib R can be achieved by rotating the cylindrical part B, rather than requiring the rolling unit 32 to perform complex movements, this design reduces the mechanical load on the rolling unit 32, lowers the risk of equipment failure, and improves processing flexibility and efficiency. Furthermore, since the cylindrical part B is stably held by the clamping mechanism 20 without slippage, the rib R can be directly manufactured on the inner wall IW of the cylindrical part B without the need for additional support structures. This further improves the efficiency of the manufacturing process and reduces potential quality problems caused by support structures. In summary, this design achieves precise control over the speed and position of each component during the forming process of the rib R by precisely controlling the rotation of the cylindrical part B and the axial movement of the rolling unit 32, thereby ensuring the geometric accuracy and performance of the rib R.

[0016] In one specific embodiment of this disclosure, such as in Figure 3 As shown, the rotating component 10 can be a gear ring, which rotates around its own central axis through gear transmission.

[0017] The rotating component 10 employs a gear ring design, enabling its rotation around its central axis via a standard gear transmission system. This design simplifies and directly the rotation of the cylindrical component B, as gear transmission systems are a mature and widely used technology, easy to implement, and can be integrated into various mechanical devices. The gear ring's rotation can be driven by different power sources such as motors, hydraulic systems, or pneumatic systems, providing flexibility and adaptability. Control of the gear ring's rotation can be achieved by adjusting relevant parameters of the gear transmission system, such as adjusting the motor speed or using a frequency converter to precisely control the gear ring's speed. This control method not only ensures that the cylindrical component B rotates at a constant speed but also allows for speed adjustments as needed during the manufacturing of the rib R to adapt to different processing conditions and material properties. Furthermore, precise control of the gear ring's speed can optimize the arc additive manufacturing and rolling processes, improving the manufacturing quality of the rib R. Figure 3 As shown, the clamping mechanism 20 is fixed to the end face of the gear ring, so that the clamping mechanism 20 can rotate synchronously when the gear ring rotates. This design simplifies the structure of the equipment because no additional transmission mechanism is needed to synchronize the rotation of the clamping mechanism 20. At the same time, this also ensures the stability and consistency of the cylindrical part B during processing, as the clamping mechanism 20 is always aligned with the rotation axis of the cylindrical part B. The synchronous rotation of the clamping mechanism 20 also helps to reduce vibration and stress caused by asynchronous rotation, thereby improving processing accuracy and equipment lifespan.

[0018] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 4 and combined Figure 3 The clamping mechanism 20 may include a radial clamping unit 21, which is used to clamp the cylindrical part B in the radial direction.

[0019] Because the outer circumferential surface area of ​​the cylindrical part B is relatively large, it provides ample contact area for radial clamping, making clamping operations easy to implement. This design allows the clamping mechanism 20 to contact the outer circumferential surface of the cylindrical part B through the radial clamping units 21, thus providing a stable and easily adjustable clamping solution. Furthermore, the larger contact area helps to disperse the clamping force, reducing the risk of damage to the surface of the cylindrical part B, for example, when multiple radial clamping units 21 are evenly distributed circumferentially around the cylindrical part B. The design of the clamping mechanism 20 ensures that the cylindrical part B remains stationary under forces in all directions. The radial clamping units 21 apply uniform and stable clamping forces, preventing displacement or rotational deviation of the cylindrical part B during processing. This robust clamping capability is crucial for ensuring processing accuracy, especially during the arc additive manufacturing and rolling processes of the rib R, where significant forces are required to ensure uniform material deposition and compaction. The stability of the clamping mechanism 20 ensures that the cylindrical part B maintains its correct position and orientation even under these forces, thereby ensuring processing quality. Because the cylindrical part B is firmly clamped during the processing, the processing device 30 can perform arc additive manufacturing and rolling on the rib R under precise control. This stable clamping method reduces processing errors caused by vibration or displacement of the cylindrical part B, thereby improving processing accuracy and surface quality. This is especially important for manufacturing key components such as spacecraft main structural parts with precise dimensions and surface requirements.

[0020] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 5 and combined Figure 4 The radial clamping unit 21 may include: Base 211, base 211 is fixed to rotating member 10 and has a first mating part 211M; The displacement member 212 has a plurality of second mating parts 212M, each of which is configured to engage with a first mating part 211M to fix the displacement member 212 to the base 211, and the displacement member 212 has a screw hole not shown in the figure. Bolt 213, bolt 213 mates with the threaded hole. In this process, the cylindrical part B is clamped by the bolt 213 through the engagement of different second mating parts 212M with the first mating part 211M and the translation of the bolt 213 in the screw hole.

[0021] The base 211 is fixed to the rotating member 10 and has a first mating portion 211M. A plurality of second mating portions 212M are formed on the displacement member 212, each of which is configured to mate with the first mating portion 211M, thereby fixing the displacement member 212 to the base 211. This design allows the radial clamping unit 21 to adapt to cylindrical parts B of different diameters by changing the position of the displacement member 212, ensuring wide applicability and flexibility. The design of the displacement member 212 allows for large positional changes through stepwise displacement, while continuous displacement of the bolt 213 allows for small positional adjustments. This design enables the clamping mechanism 20 to clamp cylindrical parts B of any radial size more quickly. By engaging different second mating portions 212M with the first mating portion 211M, and by the translation of the bolt 213 in the threaded hole, the clamping force and position can be precisely adjusted, achieving fast and stable clamping. This fast-response clamping mechanism significantly improves production efficiency, especially in scenarios where different sizes of cylindrical parts B need to be frequently changed.

[0022] As in Figure 5 As shown, the first mating part 211M can be a through hole, and the second mating part 212M can also be a through hole. In this case, for example, the displacement member 212 can be fixed to the base 211 by means of a shaft passing through the through hole. Additionally, as shown in... Figure 5 As shown, bolt 213 can also clamp cylindrical member B via a plate-like member, which may have protrusions formed on it for contacting cylindrical member B. Additionally, as in... Figure 5 As shown, the radial clamping unit 21 can be fixed to the gear ring via the through hole 211H and the corresponding bolts and the screw holes formed on the end face of the gear ring.

[0023] In one specific embodiment of this disclosure, the clamping mechanism 20 may further include an axial clamping unit (not shown in the drawings) for clamping the cylindrical member B in the axial direction.

[0024] During the manufacturing of the rib R, especially in arc additive manufacturing and rolling processes, the cylindrical part B may be subjected to significant axial forces. Relying solely on the radial clamping unit 21 may not be sufficient to prevent axial displacement of the cylindrical part B, which would affect machining accuracy and product quality. To address this issue, the clamping mechanism 20 of this disclosure further includes an axial clamping unit for clamping the cylindrical part B along its axial direction. The axial clamping unit is designed for ease of operation and effectively prevents displacement of the cylindrical part B under axial forces, thereby ensuring the stability of the machining process and the quality of the finished product. The clamping mechanism 20, by combining the radial clamping unit 21 and the axial clamping unit, ensures that the cylindrical part B remains stable and does not shift under the action of force in any direction. Specifically, the radial clamping unit 21 is responsible for resisting the force from the radial direction of the cylindrical part B, while the axial clamping unit is responsible for controlling the force in the axial direction. This integrated clamping mechanism design significantly improves the stability of the cylindrical part B during the processing. Whether it is the thermal stress in the arc additive manufacturing process or the mechanical stress in the rolling process, it can ensure that the position and orientation of the cylindrical part B remain unchanged.

[0025] Although not shown in detail in the accompanying drawings, it is understood that the axial clamping unit can be implemented in various ways, and each implementation can clamp cylindrical parts B with different radial dimensions, which are described in detail below. In one implementation, the axial clamping unit may include: an axial clamping base fixed to the rotating member 10 for supporting the structure of the entire axial clamping unit; an adjusting screw mounted on the axial clamping base, movable axially along the cylindrical part B to accommodate cylindrical parts B with different radial dimensions and adjust the clamping force; a clamping block connected to the adjusting screw, whose position relative to the cylindrical part B is changed by the movement of the screw to achieve clamping; a limiting device disposed on the axial clamping base for limiting the range of movement of the clamping block to prevent over-clamping or loosening; and a drive mechanism, which may be electric, pneumatic, or hydraulically driven, for driving the movement of the adjusting screw. The operating principle of this axial clamping unit is as follows: a drive mechanism drives an adjusting screw to move axially along the cylindrical part B, causing the clamping block to move accordingly, thus achieving axial clamping of the cylindrical part B. The clamping block can be designed with a non-slip surface to enhance friction with the cylindrical part B and ensure clamping stability. Additionally, a limiting device ensures that the clamping block will not exceed a preset safety range during adjustment. In another implementation, the axial clamping unit may include: a hydraulic cylinder, serving as the primary driving force, adjusting the axial clamping force through changes in hydraulic oil pressure; a piston rod, connected to the hydraulic cylinder, moving under the cylinder's drive to clamp cylindrical parts B of different sizes; a clamping pad, installed at the end of the piston rod for contact with the cylindrical part B; and a pressure regulating valve to control the hydraulic oil pressure, thereby adjusting the clamping force. The operating principle of this axial clamping unit is that adjusting the pressure regulating valve changes the pressure within the hydraulic cylinder, thereby driving the piston rod to move and achieving axial clamping of the cylindrical part B.

[0026] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 6 and combined Figure 3 The device 1 may also include a lifting mechanism 40, which is used to lift the cylindrical component B to a position where the longitudinal axis LA of the cylindrical component B is collinear with the rotation axis RA.

[0027] In this configuration, the operator can easily place the cylindrical part B onto the lifting mechanism 40 and, through the lifting function of the lifting mechanism 40, move the cylindrical part B to a position collinear with the rotation axis RA. This facilitates the clamping by the clamping mechanism 20, as this step is a crucial prerequisite for the effective clamping of the cylindrical part B by the clamping mechanism 20. With precise control of the lifting mechanism 40, the cylindrical part B can be easily moved to the desired position, preparing it for subsequent clamping and processing.

[0028] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 6 and combined Figure 1 The lifting mechanism 40 may include: For example, a lifting platform 46 driven by a hydraulic cylinder; The first hinge 41 and the second hinge 42 are hinged to the lifting platform 46. The first hinge 41 and the second hinge 42 are hinged to be able to rotate about the hinge axis HA below the rotation axis RA and parallel to the rotation axis RA. The first roller 43 is configured to rotate together with the first hinge 41 and is parallel to the axis of rotation RA. The second roller 44 is configured to rotate together with the second hinge 42 and be parallel to the axis of rotation RA, wherein the first roller 43 and the second roller 44 are used to jointly support the cylindrical member B in a manner parallel to the cylindrical member B; The drive unit 45 is used to drive the first hinge 41 and the second hinge 42 to rotate.

[0029] Thus, as the lifting platform 46 rises or falls, the first hinge 41 and the second hinge 42 can adapt to cylindrical parts B with different radial dimensions, providing reliable support. The lifting function of the lifting platform 46, combined with the rotation of the hinges, ensures the precise vertical positioning of the cylindrical part B. Simultaneously, the rotational capability of the hinges allows it to adapt to cylindrical parts B of different sizes, achieving all-around support for the cylindrical part B. Since the lifting of the cylindrical part B is achieved through the lifting platform 46, this process can be completed with simple operation. The vertical movement of the lifting platform 46 allows the longitudinal axis LA of the cylindrical part B to be easily aligned with the rotation axis RA. This design simplifies the alignment process, reduces the need for complex adjustment mechanisms, and thus improves the convenience and efficiency of operation. By precisely controlling the height of the lifting platform 46, it can be ensured that the cylindrical part B remains collinear with the rotation axis RA at all times, which is crucial for subsequent processing steps. The precise lifting and alignment of cylindrical component B with the rotation axis RA is crucial for machining accuracy. Through the coordinated work of the lifting platform 46 and the hinge, the stability and accuracy of cylindrical component B during machining are ensured. This stability and accuracy improve machining quality, reduce machining errors, and thus improve the machining accuracy of the final product.

[0030] In one specific embodiment of this disclosure, although not shown in the drawings, it is understood that a heating unit may be provided inside the first roller 43 and the second roller 44 for heating the cylindrical component B.

[0031] This allows for uniform heating of the cylindrical part B during the arc additive manufacturing process, particularly for large-sized cylindrical parts B, addressing the issue of significant temperature differences encountered during forming. By controlling the temperature of the heating unit, the temperature gradient of the cylindrical part B during arc additive manufacturing can be reduced, thereby decreasing thermal stress caused by temperature changes and minimizing uneven distribution of material properties. The heating unit helps control the temperature of the cylindrical part B during arc additive manufacturing, reducing residual thermal stress caused by rapid heating and cooling. This temperature control helps suppress the cracking tendency of the cylindrical part B, especially when manufacturing cylindrical parts with complex internal wall structures, where residual thermal stress is a major factor leading to cracking. Maintaining the temperature stability of the cylindrical part B significantly improves the safety of the processing and the quality of the final product. Preheating or holding the cylindrical part B with the heating unit reduces temperature fluctuations during processing, improving process stability. This temperature control also helps reduce thermal deformation during processing, ensuring machining accuracy, which is particularly important when manufacturing components with high precision requirements. The use of a heating unit can also optimize the microstructure and mechanical properties of cylindrical component B. By precisely controlling the heating process, recrystallization of the material can be promoted, grains can be refined, thereby improving the material's strength and toughness. This is of great significance for improving the final performance of cylindrical component B, especially in applications subjected to complex mechanical loads. In summary, the technical solution of this invention, by integrating a heating unit into the lifting mechanism 40, achieves temperature control of cylindrical component B, effectively reducing the temperature gradient and suppressing the tendency to crack due to residual thermal stress. This design not only improves the stability and reliability of the processing but also optimizes the microstructure and mechanical properties of the material, providing strong support for manufacturing high-performance cylindrical components.

[0032] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 6 The lifting mechanism 40 may include a third roller 47, which is used to contact the bottom of the cylindrical part B during the lifting process. The third roller 47 may be provided with an ultrasonic vibration unit (not shown in the figure) inside, which is used to reduce the content of bubbles in the molten pool formed by electric arc additive manufacturing.

[0033] like Figure 6As shown, the third roller 47 in the lifting mechanism 40 contacts the bottom of the cylindrical component B during the lifting process. This design allows the third roller 47 to bear most of the weight and rolling load of the cylindrical component B, significantly reducing the burden on the first roller 43 and the second roller 44. Through this redistribution of weight and load, the pressure on the first roller 43 and the second roller 44 can be reduced, thereby reducing the risk of wear and damage caused by long-term high-load operation and extending the service life of the rollers. The third roller 47 is equipped with an ultrasonic vibration unit, which is used to reduce the bubble content in the molten pool formed by arc additive manufacturing. In the arc additive manufacturing process, bubbles in the molten pool are an important factor affecting the quality of the rib R. The application of the ultrasonic vibration unit can promote the escape of bubbles in the molten pool and reduce the residual bubbles in the rib R, thereby improving the density and mechanical properties of the rib R. Reducing the bubble content can not only improve the strength and toughness of the rib R, but also reduce stress concentration and potential crack sources caused by bubbles, significantly improving the reliability and durability of the final product. In addition to reducing bubble content, ultrasonic vibration can also promote material mixing and grain refinement, further improving the microstructure and mechanical properties of the rib R. This optimized manufacturing process helps achieve more uniform material deposition and finer rib R forming, meeting the application requirements of high precision and high performance. In summary, the technical solution of this invention effectively reduces the burden on the first roller 43 and the second roller 44 by having the third roller 47 bear most of the weight and rolling load of the cylindrical part B, and reduces the bubble content in the molten pool during arc additive manufacturing through the ultrasonic vibration unit, thus improving the quality of the rib R. This design not only improves the efficiency and reliability of the processing, but also optimizes the performance of the final product, providing strong support for manufacturing high-performance cylindrical parts.

[0034] In one specific embodiment of this disclosure, the circumferential surface of the third roller 47 is covered with a wear-resistant and high-temperature-resistant material.

[0035] The choice of this material takes into account the wear that may result from the contact and relative movement between the roller and the cylindrical part B during the arc additive manufacturing process. The application of wear-resistant materials significantly reduces the wear rate on the roller surface, thereby extending the service life of the third roller 47 and reducing the frequency of maintenance and replacement due to wear. In addition to wear resistance, the material covering the third roller 47 also has high-temperature resistance. During the arc additive manufacturing process, the roller surface may suffer thermal damage due to high temperatures. The use of high-temperature resistant materials can protect the roller from the effects of high temperatures, preventing material degradation or damage caused by prolonged high temperatures, further extending the service life of the third roller 47. The application of wear-resistant and high-temperature resistant materials reduces the maintenance requirements and replacement frequency of the third roller 47, thereby reducing maintenance costs. In addition, due to the extended service life of the roller, the downtime caused by roller maintenance or replacement is correspondingly reduced, improving the working efficiency and production continuity of the entire processing system. The wear-resistant and high-temperature-resistant properties of the third roller 47 improve its stability and reliability during processing. As a key component supporting and transmitting the load, the performance stability of the roller directly affects the processing quality and continuity of the cylindrical part B. By reducing the risk of failure due to wear or thermal damage, the improved design of the third roller 47 provides more stable and reliable support for the entire processing system. In summary, the technical solution of this invention, by coating the circumferential surface of the third roller 47 with a wear-resistant and high-temperature-resistant material, effectively extends its service life, reduces maintenance costs and downtime, and improves the stability and reliability of the processing. This design not only improves the performance of a single roller but also has a positive impact on the efficiency and reliability of the entire arc additive manufacturing system.

[0036] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 3 The device 1 may also include a translation mechanism 50, which is used to translate the cylindrical part B to the lifting mechanism 40.

[0037] In this configuration, the operator can easily place the cylindrical component B onto the translation mechanism 50, for example, by hoisting or using a forklift. The translation mechanism 50 can then perform its translation function by pushing the cylindrical component B toward the lifting mechanism 40, thereby facilitating the lifting of the lifting mechanism 40.

[0038] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 3 The translation mechanism 50 may include a first row of rollers 51 and a second row of rollers 52. The first row of rollers 51 and the second row of rollers 52 are used to jointly support the cylindrical member B in contact with the first generatrix and the second generatrix of the cylindrical member B, respectively. The rotation axis TA of each roller in the first row of rollers 51 and the second row of rollers 52 is parallel to the axis of rotation of the cylindrical member B as shown in the figure. Figure 3The translation direction TD of the cylindrical component B, schematically shown by a straight arrow, is perpendicular to and contacts the cylindrical component B through its radial edge.

[0039] The translation mechanism 50 is designed with a first row of rollers 51 and a second row of rollers 52. These two rows of rollers contact the first and second generatrices of the cylindrical part B, respectively, and work together to support the cylindrical part B. In this way, the translation mechanism 50 can adapt to cylindrical parts B with different radial dimensions. This design ensures that the translation mechanism 50 can effectively support and transport the cylindrical part B regardless of its size, guaranteeing wide applicability. Because the rollers contact the generatrices of the cylindrical part B, this contact method provides good support, allowing the cylindrical part B to maintain balance during translation and preventing it from tipping over or rolling. The use of the translation mechanism 50 not only improves the efficiency of transporting the cylindrical part B but also enhances the safety of the entire processing process. Operators no longer need to manually handle the cylindrical part B, reducing labor intensity and the risk of injury. Furthermore, the translation mechanism 50 enables rapid positioning of the cylindrical part B, shortening processing preparation time and thus improving production efficiency. Once the cylindrical part B is moved to the lifting mechanism 40 by the translation mechanism 50, the lifting mechanism 40 can lift it quickly and steadily. This collaborative working mechanism ensures the stability of the cylindrical part B throughout the entire processing process, maintaining its correct position and orientation whether in arc additive manufacturing or rolling.

[0040] In one specific embodiment of this disclosure, see [link to specific embodiment]. Figure 3 Each of the first row of rollers 51 and the second row of rollers 52 can be adjusted such that the plane in which it lies intersects the longitudinal axis LA of the supported cylindrical member B. Here, "plane in which it lies" means that, unlike a drum, a roller can be considered as a thin sheet-like part, and thus, the roller can be considered to lie in a certain plane.

[0041] This design ensures that the weight of the cylindrical component B and the forces that may be generated during handling are transmitted along the rotation axis TA of the roller. Because the force is transmitted along the roller's axis, the risk of deformation due to improper force distribution is greatly reduced. This optimized force distribution improves the roller's durability and extends its service life. By ensuring that the force of the cylindrical component B is transmitted through the rotation axis TA of the roller, the roller in the translation mechanism 50 can more effectively bear the weight of the cylindrical component B. This design improves the roller's load-bearing capacity, enabling the translation mechanism 50 to handle heavier cylindrical components B, thus expanding the application scope of the disclosed technical solution.

[0042] It should be noted that the technical solutions described in the embodiments of this disclosure can be combined arbitrarily without conflict.

[0043] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An apparatus for manufacturing ribs on the inner wall of a cylindrical component, characterized in that, The device includes: A rotating member configured to rotate about a rotation axis; A clamping mechanism configured to rotate with the rotating member and for clamping the cylindrical member such that the longitudinal axis of the cylindrical member is collinear with the axis of rotation; A processing apparatus for performing arc additive manufacturing on the inner wall of the cylindrical member and rolling the added material to obtain the ribs, the processing apparatus being configured to move axially on the clamped cylindrical member. The clamping mechanism includes a radial clamping unit, which is used to clamp the cylindrical part in the radial direction. The radial clamping unit includes: A base, which is fixed to the rotating member and has a first mating part; A displacement member having a plurality of second mating portions, each of the plurality of second mating portions being configured to engage with a first mating portion to fix the displacement member to the base, and the displacement member having a screw hole; Bolt, the bolt engaging with the threaded hole, The cylindrical component is clamped by the bolt through different second mating parts engaging with the first mating part and the bolt translating in the bolt hole; The device further includes a lifting mechanism for lifting the cylindrical component to a position where the longitudinal axis of the cylindrical component is collinear with the rotation axis. The lifting mechanism includes: Lifting platform; A first hinge and a second hinge are hinged to the lifting platform, the first hinge and the second hinge being hinged to be able to rotate about a hinge axis below and parallel to the rotation axis. A first roller, configured to rotate with the first hinge and parallel to the axis of rotation; The second roller is configured to rotate together with the second hinge and is parallel to the axis of rotation, wherein the first roller and the second roller are used to jointly support the cylindrical member in a manner parallel to the cylindrical member; A driving unit, the driving unit being used to drive the first hinge and the second hinge to rotate; Heating units are provided inside the first roller and the second roller, and the heating units are used to heat the cylindrical component; The lifting mechanism further includes a third roller, which is used to contact the bottom of the cylindrical part during the lifting process, and the third roller is used to bear most of the weight of the cylindrical part and the rolling load generated when the processing device rolls the added material. An ultrasonic vibration unit is provided inside the third roller, which is used to reduce the content of bubbles in the molten pool formed by electric arc additive manufacturing.

2. The apparatus for manufacturing ribs on the inner wall of a cylindrical component according to claim 1, characterized in that, The rotating component is a gear ring, which rotates around its own central axis via gear transmission.

3. The apparatus for manufacturing ribs on the inner wall of a cylindrical component according to claim 1, characterized in that, The clamping mechanism further includes an axial clamping unit, which is used to clamp the cylindrical part in the axial direction.

4. The apparatus for manufacturing ribs on the inner wall of a cylindrical component according to claim 1, characterized in that, The device also includes a translation mechanism for translating the cylindrical component to the lifting mechanism.

5. The apparatus for manufacturing ribs on the inner wall of a cylindrical component according to claim 4, characterized in that, The translation mechanism includes a first row of rollers and a second row of rollers. The first row of rollers and the second row of rollers are used to jointly support the cylindrical member in a manner that contacts the first generatrix and the second generatrix of the cylindrical member, respectively. The rotation axis of each roller in the first row of rollers and the second row of rollers is perpendicular to the translation direction of the cylindrical member and contacts the cylindrical member through a radial edge.

6. The apparatus for manufacturing ribs on the inner wall of a cylindrical component according to claim 5, characterized in that, Each of the first and second rows of rollers can be adjusted such that the plane in which it lies intersects the longitudinal axis of the supported cylindrical member.

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