Spinning device and spinning forming method applied to hastelloy drum body

Abstract

The invention relates to the technical field of spinning, and discloses a spinning device and a spinning forming method applied to a hastelloy drum body, and the spinning device comprises a mold set, a tail top set, a main shaft mechanism, a spinning mechanism and a heating mechanism. The mold group comprises a plurality of independently arranged molds; the tail top set comprises a plurality of tail tops which are independently arranged, and the tail tops are matched with the mold. The spindle mechanism is connected with the mold; the pressing mechanism comprises a main rotary knife assembly and a ribbing knife assembly which are independently arranged, and the main rotary knife assembly and the ribbing knife assembly are both matched with the main shaft mechanism for spinning; and the heating mechanism comprises a plurality of independently arranged heating guns. Through the design of the spinning device, the mold set and the tail top set are matched to achieve gradual spinning of the workpiece, the problems of grain distortion and dislocation density surge caused by plastic deformation of materials are effectively relieved, and the product percent of pass of spinning machining of the hastelloy drum body is greatly increased.

Description

Technical Field

[0001] This application belongs to the field of spinning technology, specifically relating to a spinning device and spinning method for Hastelloy drum bodies. Background Technology

[0002] Hastelloy, a high-performance nickel-based corrosion-resistant alloy, is widely used in harsh environments such as chemical, metallurgical, and environmental protection industries due to its excellent corrosion resistance, high-temperature resistance, and creep resistance. As the core rotating component of separation equipment such as centrifuges and dryers, the drum body directly contacts corrosive media and operates at high speeds, placing extremely high demands on the material's corrosion resistance and structural strength. Therefore, Hastelloy has become an ideal material for drum body manufacturing.

[0003] However, during the spinning process of Hastelloy drum bodies, due to their complex alloy composition and stable crystal structure, work hardening effects are very likely to occur during the spinning plastic deformation process. As the spinning process progresses, the internal grains of the material become distorted and the dislocation density increases significantly, resulting in a rapid increase in the strength and hardness of the product, while the plasticity and toughness decrease sharply. This change in performance will exacerbate the stress concentration phenomenon in the material during spinning, which can easily lead to defects such as surface cracks and local tearing. In severe cases, it may even cause the billet to be scrapped directly, greatly reducing the product qualification rate. Summary of the Invention

[0004] To address the shortcomings of the prior art, this application provides a spinning device and spinning method for Hastelloy drum bodies. Through the design of the spinning device, a mold group and a tail-end group are used to achieve gradual spinning of the workpiece, which effectively alleviates the problem of grain distortion and dislocation density surge caused by plastic deformation of the material, and significantly improves the product qualification rate of Hastelloy drum body spinning processing.

[0005] The technical effects to be achieved in this application are realized through the following aspects: In a first aspect, this application provides a spinning device for a Hastelloy rotary drum, the rotary drum comprising a main body and a workpiece, the workpiece being installed inside the main body; comprising: A die set consists of multiple independently set dies, each used to assist in spinning operations at different stages; The tail jack assembly includes multiple independently configured tail jacks, which are adapted to the mold and are used to assist in spinning processes by matching the mold with the tail jacks respectively. A spindle mechanism, connected to the mold, is used to loosen and rotate the mold and the workpiece; The spinning mechanism includes an independently configured main spinning cutter assembly and a ribbed cutter assembly. Both the main spinning cutter assembly and the ribbed cutter assembly cooperate with the spindle mechanism for spinning, to meet the spinning requirements of different positions on the workpiece in different processes; and The heating mechanism includes multiple independently configured heating guns for heating different positions of the workpiece and / or the mold in different processes.

[0006] In some implementations, the mold group includes a first mold, a second mold, and a third mold that are set up independently; The tail top group includes a first tail top, a second tail top, a third tail top, and a fourth tail top, which are set independently. The first mold is adapted to the first tail top, the second mold is adapted to the second tail top and the third tail top respectively, and the third mold is adapted to the fourth tail top.

[0007] In some implementations, the first mold includes a body and a protrusion, the protrusion being disposed in the middle of the body, and a fixing surface being provided at the end of the protrusion away from the body; The first tail top is provided with a pressing surface and an inclined surface. The pressing surface is arranged opposite to the fixed surface, and the inclined surface is provided at the edge of the pressing surface. The inclined surface is inclined from the end connected to the pressing surface to the end away from the pressing surface towards the central axis of the pressing surface. When the first mold and the first tail tip work together, the protrusion is used to spin the workpiece through the main rotary cutter assembly and the heating gun to form a protrusion.

[0008] In some implementations, the outer surface of the protrusion is provided with a gentle rotating surface, which is inclined from one end near the top pressing surface to one end near the body in a direction away from the central axis of the top pressing surface.

[0009] In some implementations, the second mold has a groove, a spiral plane, and a spiral folding surface, wherein the spiral plane is connected to the edge of the groove, and the spiral folding surface is connected to the end of the spiral plane away from the groove; The second tail tip is embedded in the groove, and the edge of the second tail tip abuts against the inner wall of the groove near the spiral plane; When the second mold and the second tail tip work together, the groove is used to place the protrusion of the workpiece, and the rotating plane is used to spin the workpiece through the main rotating blade assembly and the heating gun to form the bottom.

[0010] In some implementations, the third tail cap is disposed in the groove and presses against the rotating plane; When the second mold and the third tail tip work together, the folding surface is used to spin the workpiece through the main swivel assembly and the heating gun to form the edge.

[0011] In some implementations, the third mold is provided with a storage slot for embedding the main body, and the interior of the main body is in contact with the bottom and sides of the workpiece. The fourth tail top includes a clearance part and a pressing part. The pressing part is disposed on the edge of the clearance part. The clearance part is provided with a clearance groove corresponding to the protrusion of the workpiece. The clearance groove is covered on the protrusion of the workpiece. The pressing part is disposed abutting against the bottom of the workpiece. When the third mold and the fourth tail tip work together, the space between the clearance part and the edge of the workpiece forms an operating area. The operating area is used by the crimping knife assembly to spin and press the edge of the workpiece to form multiple crimped parts.

[0012] Secondly, this application provides a spinning forming method, which uses the above-mentioned spinning device to perform spinning, and the spinning forming method includes the following steps: Process 1: Thinning and elongating the workpiece; The first mold is installed on the spindle mechanism, and the workpiece is pushed against the first mold by the first tail jack; The spindle mechanism rotates, the heating gun heats the workpiece, and the main rotary cutter group spins and thins and elongates the workpiece until the workpiece is spun into a first shape, so that the first shape of the workpiece has protrusions. Step 2: Spinning the first-form workpiece into the second-form workpiece: Remove the first mold and install the second mold on the spindle mechanism. Embed the first-form workpiece into the second mold and push the first-form workpiece against the second mold using the second tail jack. The spindle mechanism rotates, the heating gun heats the area of ​​the workpiece to be spun, and the main rotary cutter assembly spins and flattens the workpiece until the first-form workpiece is spun into the second-form workpiece, so that the second-form workpiece has a bottom. Step 3: Spinning the second-form workpiece into a third-form workpiece: Remove the second tail tip and use the third tail tip to press the second-form workpiece against the bottom; the spindle mechanism rotates, the heating gun heats the workpiece at the required spinning point, and the main spinneret sets spin and bend the workpiece until the second-form workpiece is spun into a third-form workpiece, so that the third-form workpiece has an edge. Step 4: Forming of the drum body: Replace the second mold with the third mold and install it on the main shaft mechanism. Place the main body on the third mold and place the workpiece in the third form inside the main body. Then, press the bottom of the workpiece with the fourth tail top. The heating gun heats the third mold and the area to be spun. The ribbing knife assembly spun multiple ribs on the edge of the workpiece to make the main body and the workpiece fit together to form the drum body.

[0013] In some implementations, in step one, the spindle mechanism rotates at 230 r / min, the multiple heating guns heat the workpiece to 860°C-900°C, and the pressure of the first tail tip is 50 psi. In processes two and three, the spindle mechanism rotates at 230 r / min, and multiple heating guns heat the workpiece to 860°C-900°C. The pressure of the second tail tip and the third tail tip is 50 psi. In process four, the spindle mechanism rotates at 130 r / min, and multiple heating guns are used to heat the mold for a continuous heating time of 2 minutes.

[0014] In some implementations, the main rotary cutter assembly is provided with a rounded corner cutter wheel, the included angle of which is 75.5 degrees to 76.5 degrees; the rib-pressing cutter assembly is provided with a rib-pressing rotary wheel that is adapted to the rib-pressing contour of the drum body.

[0015] In summary, this application has at least the following advantages: The spinning apparatus and spinning method for Hastelloy drum bodies provided in this application implement step-by-step spinning through the coordinated operation of the die set and the tail assembly. The die set can match the forming contour according to the deformation characteristics of Hastelloy at each stage of spinning, and the tail assembly disperses the axial clamping force with multi-point support, effectively alleviating the problem of grain distortion and dislocation density surge caused by plastic deformation of the material, reducing the stress concentration caused by work hardening, and thus significantly reducing the generation of defects such as surface cracks and local tearing, avoiding premature scrapping of the blank, greatly improving the product qualification rate of Hastelloy drum body spinning processing, effectively ensuring the spinning forming quality, and also greatly reducing material consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the drum body in the embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the structure of the first mold and the first tail tip in Embodiment 1 of this application.

[0018] Figure 3 This is a schematic diagram of the structure of the second mold and the second tail tip in Embodiment 1 of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the second mold and the third tail tip in Embodiment 1 of this application.

[0020] Figure 5 This is a schematic diagram of the structure of the third mold and the fourth tail tip in Embodiment 1 of this application.

[0021] Figure 6 This is a schematic diagram of the structure of the molded workpiece in the embodiments of this application.

[0022] Figure 7 This is a schematic diagram showing the structure of the first mold and the first tail top in Embodiment 2 of this application.

[0023] Figure 8 This is a schematic diagram showing the structure of the second mold in Embodiment 2 of this application.

[0024] Figure 9 This is a schematic diagram of the disassembled structure of the third mold and the fourth tail top in Embodiment 2 of this application.

[0025] Marked in the image: 11. Main body; 12. Workpiece; 121. Protrusion; 122. Bottom; 123. Side; 124. Rib; 21. Main rotary cutter assembly; 22. Rib cutter assembly; 31. First mold; 311. Body; 312. Protrusion; 313. Fixing surface; 314. Slow-rotating surface; 32. Second mold; 321. Groove; 322. Rotating surface; 323. Rotating fold surface; 33. Third mold; 331. Storage slot; 41. First tail top; 411. Top pressing surface; 412. Inclined surface; 42. Second tail top; 43. Third tail top; 44. Fourth tail top; 441. Clearance part; 442. Pressing part; 443. Clearance groove; 5. Operating area. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this application, not all embodiments.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0028] Example 1: Please see the appendix Figures 1-5This application discloses a spinning device for Hastelloy rotary drum bodies. The rotary drum body includes a main body 11 and a workpiece 12, with the workpiece 12 installed inside the main body 11. The device includes a die assembly, a tailstock assembly, a spindle mechanism, a spinning mechanism, and a heating mechanism. The die assembly includes multiple independently configured dies, each used to assist in spinning operations at different stages. The tailstock assembly includes multiple independently configured tailstocks, each adapted to a die, used to assist in spinning operations at different stages. The spindle mechanism is connected to the dies and is used to loosen and rotate the dies and workpiece 12. The spinning mechanism includes independently configured main spinneret assemblies 21 and crimping rib assemblies 22, both of which cooperate with the spindle mechanism for spinning, addressing the spinning requirements at different positions of the workpiece 12 in different stages. The heating mechanism includes multiple independently configured heating guns, used to heat different positions of the workpiece 12 and / or the dies in different stages.

[0029] In this embodiment, during the spinning process, the spindle mechanism first connects to the mold in the mold group that is suitable for the corresponding process, and at the same time, the tail tip of the tail tip group synchronously presses against the workpiece 12 to ensure the coaxiality of the mold and the workpiece 12. According to the requirements of different spinning processes, the corresponding mold in the mold group and the matching tail tip of the tail tip group are switched, and several heating guns of the heating mechanism are used to heat the spinning position of the workpiece 12 or the mold. Then, the spindle mechanism drives the mold and the workpiece 12 to rotate, and the spinning mechanism switches the main spinning knife assembly 21 or the rib-pressing knife assembly 22 according to the processing requirements, which precisely cooperates with the rotating workpiece 12 to complete the spinning operations of different positions such as the forming of the main body 11 and the local rib pressing in sequence. The various mechanisms work together to achieve continuous spinning of multiple processes.

[0030] By switching between the mold assembly and the tail assembly, step-by-step spinning can be achieved, avoiding the problem of accelerated work hardening caused by large one-time deformation of Hastelloy. At the same time, the multi-point support of the tail assembly can disperse the axial clamping force and reduce stress concentration on the workpiece 12. The heating mechanism can improve the plasticity of Hastelloy during spinning by heating different processes and positions, effectively alleviating the situation of grain distortion and dislocation density surge. Furthermore, the independent switching between the main spinning cutter assembly 21 and the crimping cutter assembly 22 can adapt to the processing requirements of different processes, avoid the decrease in toughness caused by over-processing, effectively suppress the generation of defects such as surface cracks and local tearing during the spinning of Hastelloy drum body, significantly improve the product qualification rate, and ensure the comprehensive mechanical properties of the drum body after forming.

[0031] In some embodiments, the mold assembly includes a first mold 31, a second mold 32, and a third mold 33 that are independently configured; the tail top assembly includes a first tail top 41, a second tail top 42, a third tail top 43, and a fourth tail top 44 that are independently configured; the first mold 31 and the first tail top 41 are adapted to each other, the second mold 32 is adapted to the second tail top 42 and the third tail top 43 respectively, and the third mold 33 and the fourth tail top 44 are adapted to each other.

[0032] When the spinning device is working, the spindle mechanism first assembles the first mold 31 of the mold assembly, and together with the first tail jack 41 of the tail jack assembly, completes the clamping and positioning of the workpiece 12. The heating gun heats the spinning position in the middle of the workpiece 12, and the main spinneret assembly 21 rotates the workpiece 12 along with the spindle mechanism to spin the middle of the workpiece 12 to form a protrusion 121. Next, it switches to the second mold 32, and together with the second tail jack 42, completes the re-clamping of the workpiece 12. The heating gun heats the edge of the protrusion 121 of the workpiece 12, and the main spinneret assembly 21 continues the spinning operation to process the bottom 122 structure in this position. Then, the second tail jack 42 is switched to the third mold 32. The tail tip 43 presses and fixes the bottom 122. The heating gun heats the bottom 122 of the workpiece 12 away from the protrusion 121. The main rotary cutter assembly 21 spins and presses it to form the edge 123 structure. Finally, the third mold 33 is replaced and works with the fourth tail tip 44 to clamp the workpiece 12. The heating gun heats the edge 123 of the workpiece 12, the rib position of the main body 11 of the drum body, and the third mold 33 respectively. The rib cutter assembly 22 is used to shape and press the edge 123 and the main body 11 of the workpiece 12 to form multiple ribs 124. Each mold, tail tip, cutter, and heating gun works in steps to complete the whole process of spinning and forming the Hastelloy drum body.

[0033] By adapting the three molds and four tailings in stages, the workpiece 12 can be spun in different phases, avoiding the problem of increased work hardening caused by continuous large deformation of Hastelloy. Simultaneously, the differentiated matching of the multiple tailings allows for adjustment of support points and clamping forces at different spinning stages, effectively dispersing local stress on the workpiece 12. The targeted switching between the main spinneret assembly 21 and the rib-setting assembly 22 can adapt to the processing requirements of different processes such as protrusion 121 forming, bottom 122 machining, and rib strengthening, avoiding a decrease in toughness caused by mismatched contact between the tool and the workpiece 12. Heating different spinning positions with the heating gun can improve the plasticity of corresponding parts of the Hastelloy, greatly alleviating grain distortion and dislocation density surges, significantly suppressing defects such as surface cracks and localized tearing, thereby significantly improving the product qualification rate and ensuring the spinning quality of the drum body.

[0034] Example 2: The difference between this embodiment and Embodiment 1 is that, please refer to... Figures 6-7In this embodiment, the first mold 31 includes a body 311 and a protrusion 312. The protrusion 312 protrudes from the middle of the body 311, and a fixing surface 313 is provided at the end of the protrusion 312 away from the body 311. The first tail tip 41 is provided with a pressing surface 411 and an inclined surface 412. The pressing surface 411 is disposed opposite to the fixing surface 313, and the inclined surface 412 is disposed at the edge of the pressing surface 411. The inclined surface 412 is inclined from the end connected to the pressing surface 411 to the end away from the pressing surface 411 towards the central axis of the pressing surface 411. When the first mold 31 and the first tail tip 41 work together, the protrusion 312 is used to spin the workpiece 12 through the main rotary cutter assembly 21 and the heating gun to form a protrusion 121.

[0035] In this embodiment, when the first mold 31 and the first tail tip 41 work together in a spinning operation, the workpiece 12 is positioned between the fixed surface 313 of the protrusion 312 and the pressing surface 411 of the first tail tip 41. The spindle mechanism drives the mold, tail tip, and workpiece 12 to rotate. The heating gun heats the workpiece 12. The main spinning cutter assembly 21 uses the operating space provided by the inclined surface 412 of the tail tip to spin the workpiece 12, ultimately forming a protrusion 121 structure on the workpiece 12. This setup not only achieves stable clamping of the workpiece 12, but also provides sufficient spinning operation space through the inclined surface 412, ensuring precise processing of the workpiece 12 by the main spinning cutter assembly 21. This effectively alleviates the stress concentration problem during Hastelloy spinning, reduces defects such as cracks and tears during the protrusion 121 forming process, and improves the forming accuracy and product qualification rate of the protrusion 121. At the same time, the main spinning cutter assembly 21 thins and elongates the edge of the protrusion 121 part of the workpiece 12, providing a foundation for the subsequent spinning forming of the workpiece 12.

[0036] In some embodiments, the outer surface of the protrusion 312 is provided with a slow-rotating surface 314, which is inclined from one end near the top pressing surface 411 to the end near the body 311 toward the central axis away from the top pressing surface 411. Specifically, when the first mold 31 and the first tail jack 41 clamp the workpiece 12 and rotate, the main rotary cutter assembly 21 follows the inclined trajectory of the slow-rotating surface 314 to spin the workpiece 12, and the heating gun simultaneously heats the workpiece 12, thereby achieving the thinning and elongation of the workpiece 12. Through this arrangement, the hard impact of vertical spinning on the workpiece 12 can be avoided, the main rotary cutter assembly 21 can be guided to apply force smoothly, and the stress concentration during Hastelloy spinning can be effectively alleviated. While achieving the thinning and elongation of the workpiece 12, damage problems such as cracks and tears in the workpiece 12 are avoided, ensuring the spinning quality and product qualification rate.

[0037] In some embodiments, see Figure 8The second mold 32 is provided with a groove 321, a rotating plane 322 and a folding surface 323. The rotating plane 322 is connected to the edge of the groove 321, and the folding surface 323 is connected to the end of the rotating plane 322 away from the groove 321. The second tail tip 42 is embedded in the groove 321, and the edge of the second tail tip 42 is in contact with the inner wall of the groove 321 near the rotating plane 322. When the second mold 32 and the second tail tip 42 work together, the groove 321 is used to place the protrusion 121 of the workpiece 12, and the rotating plane 322 is used to spin the workpiece 12 through the main rotating blade assembly 21 and the heating gun to form the bottom 122.

[0038] Specifically, the second mold 32 positions the protrusion 121 of the workpiece 12 through the groove 321. The second tail tip 42 is embedded in the groove 321 and abuts against its inner wall to fix the workpiece 12. The main spindle mechanism drives the mold and the workpiece 12 to rotate. The heating gun heats the workpiece 12. The main rotary cutter assembly 21 conforms to the trajectory of the rotary plane 322 to spin-form the workpiece 12 into the bottom 122 structure. The groove 321 of the second mold 32 and the second tail tip 42 cooperate to achieve precise positioning of the protrusion 121 of the workpiece 12. The rotary plane 322 provides a stable forming benchmark for the spinning of the bottom 122, effectively constrains the spinning deformation direction of the Hastelloy workpiece 12, alleviates the stress concentration caused by work hardening, and effectively improves the forming accuracy of the bottom 122 and the product qualification rate.

[0039] In some embodiments, the third tail tip 43 covers the groove 321 and presses against the rotating surface 322; wherein, when the second mold 32 and the third tail tip 43 work together, the rotating surface 323 is used to spin the workpiece 12 through the main rotating blade assembly 21 and the heating gun to form the edge 123.

[0040] Specifically, when the second mold 32 is used in conjunction with the third tail tip 43, the third tail tip 43 covers the mold groove 321 and presses the workpiece 12 against the rotating plane 322. The main spindle mechanism drives the mold and the workpiece 12 to rotate, the heating gun heats the corresponding part of the workpiece 12, and the main rotary cutter assembly 21 spins the workpiece 12 in accordance with the trajectory of the folding surface 323, thereby processing the workpiece 12 into the edge 123 structure. The second mold 32 and the third tail tip 43 work together to achieve stable positioning of the workpiece 12. The folding surface 323 provides a stable forming reference for the edge 123 forming, which can effectively disperse the local stress during Hastelloy spinning, avoid defects such as cracking and warping of the edge 123 due to work hardening, and effectively improve the forming accuracy and overall quality of the edge 123 of the drum body.

[0041] In some embodiments, see Figure 9The third mold 33 is provided with a storage groove 331 for embedding the main body 11. The interior of the main body 11 is in contact with the bottom 122 and the edge 123 of the workpiece 12. The fourth tail top 44 includes a relief part 441 and a pressing part 442. The pressing part 442 is provided on the edge of the relief part 441. The relief part 441 is provided with a relief groove 443 corresponding to the protrusion 121 of the workpiece 12. The relief groove 443 covers the protrusion 121 of the workpiece 12. The pressing part 442 is abutted against the bottom 122 of the workpiece 12. When the third mold 33 and the fourth tail top 44 work together, the space between the relief part 441 and the edge 123 of the workpiece 12 forms an operating area 5. The operating area 5 is used by the pressing knife assembly 22 to spin the edge 123 of the workpiece 12 to form multiple pressing parts 124.

[0042] Specifically, the third mold 33 is embedded into the positioning drum body 11 through the placement groove 331. The clearance part 441 of the fourth tail top 44 covers the protrusion 121 of the workpiece 12 with the clearance groove 443. The pressing part 442 presses against the bottom 122 of the workpiece 12 to achieve fixation. The clearance part 441 and the edge 123 of the workpiece 12 form the operating area 5. The spindle mechanism drives the mold, the body 11 and the workpiece 12 to rotate. After the heating gun heats the edge 123, the rib-pressing knife assembly 22 spins the edge 123 of the workpiece 12 within the operating area 5 to form multiple ribs 124. Through the structural arrangement of the third mold 33 and the fourth tail top 44, the stability of the drum body 11 and the workpiece 12 during the spinning process can be ensured. At the same time, the operating area 5 reserved by the clearance part 441 provides sufficient working space for the rib-pressing knife assembly 22, which can accurately complete the rib processing of the edge 123, effectively disperse the local stress when pressing Hastelloy ribs, and improve the forming accuracy of the ribs 124.

[0043] The spinning device of this application, through the precise batch adaptation of multiple sets of molds and tail tops, performs step-by-step spinning for different parts and processes of the Hastelloy drum workpiece 12. It utilizes the exclusive structure of each mold to provide precise guidance and positioning for different forming stages, and the differentiated design of each tail top achieves stable clamping of the workpiece 12 and reserves operating space. This effectively alleviates the work hardening effect and stress concentration problem in the Hastelloy spinning process, significantly reduces defects such as cracks, tears, and warping, improves the forming accuracy of each part of the drum, and thus improves the forming qualification rate, achieving high-quality forming of the Hastelloy drum.

[0044] Example 3: Based on the above embodiments, this embodiment provides a spinning forming method, which uses the above-described spinning device for spinning. The spinning forming method includes the following steps: Process 1: Thinning and elongating of workpiece 12; The first mold 31 is installed on the spindle mechanism, and the workpiece 12 is pressed against the first mold 31 by the first tail jack 41; the spindle mechanism rotates, the heating gun heats the workpiece 12, and the main rotary cutter group spins and thins and elongates the workpiece 12 until the workpiece 12 is spun into the first shape of workpiece 12, so that the first shape of workpiece 12 has protrusions 121. Heating can be achieved by using four propane guns to locally heat the spinning position. Specifically, the gun head specifications can be two 5H gun heads and two 3H gun heads, with the heating temperature reaching 860℃–900℃, and the surface of workpiece 12 turning whitish. The specific spinning process parameters can be set as follows: feed speed during the entry stage is 1000mm / min, during the die pressing stage is 400mm / min, and during the drifting and return stages are both 600mm / min; the spinning gap is set to 2.9mm–2.8mm–5mm–5.5mm for straight edges. The spindle mechanism rotates at a speed of 230 r / min.

[0045] Step 2: Spinning the first-form workpiece 12 into the second-form workpiece 12: Remove the first mold 31 and install the second mold 32 on the spindle mechanism. Embed the first-form workpiece 12 into the second mold 32 and push the first-form workpiece 12 against the second mold 32 through the second tail jack 42. The spindle mechanism rotates, the heating gun heats the workpiece 12 at the required spinning point, and the main spinneret sets spin flatten the workpiece 12 until the first-form workpiece 12 is spun into the second-form workpiece 12, so that the second-form workpiece 12 has a bottom 122. Step 3: Spinning the second-form workpiece 12 into the third-form workpiece 12: Remove the second tail tip 42 and use the third tail tip 43 to push the second-form workpiece 12 to the bottom 122; rotate the spindle mechanism, heat the workpiece 12 at the required spinning point with the heating gun, and spin the workpiece 12 with the main spinneret to bend the surface until the second-form workpiece 12 is spun into the third-form workpiece 12, so that the third-form workpiece 12 has an edge 123. For the heating in steps two and three, four propane guns can be used to locally heat the spinning position. Specifically, two 5H guns and two 3H guns can be used, with a heating temperature reaching 860℃–900℃, resulting in a whitish surface on workpiece 12. The specific spinning process parameters can be set as follows: feed rate 800mm / min during the entry phase, 500mm / min during the die pressing phase, 1800mm / min–2200mm / min during the drifting phase, and 2000mm / min during the return phase; the spinning gap is set to 3.4mm–2.8mm–3mm. In this step, the blank processed in the previous step is reversed and placed into the mold. A drifting and returning combined toolpath is used to spin the barrel-shaped product, stopping when the vertical measurement dimension of the mold reaches 145mm. The spindle speed is 230r / min. The pressure of the second tail tip 42 and the third tail tip 43 is 50psi.

[0046] Step 4: Forming of the drum body: Replace the second mold 32 with the third mold 33 and install it on the main shaft mechanism. Place the main body 11 on the third mold 33 and place the workpiece 12 in the third form inside the main body 11. Then, press the bottom 122 of the workpiece 12 with the fourth tail 44. Heat the third mold 33 and the area to be spun with the heating gun. Use the rib knives assembly 22 to spun multiple ribs 124 on the edge 123 of the workpiece 12 so that the main body 11 and the workpiece 12 fit together to form the drum body.

[0047] Specifically, the process parameters for spinning in step four can be set as follows: feed speed of 150 mm / min; spinning gap of 0.0 mm – 2 mm interference. Heating is achieved by using two propane torches equipped with 3H nozzles to heat the entire mold for 2 minutes to mitigate the springback issue that occurs after two spinning processes, thus optimizing the film adhesion of the product after spinning. Simultaneously, three propane torches equipped with 3H nozzles are used to heat only the 124th position of the pressure rib to a red-hot state before spinning. The spindle speed is 130 r / min.

[0048] In some embodiments, the main rotary cutter assembly 21 is provided with a rounded corner cutter wheel, the included angle of which is 75.5 degrees to 76.5 degrees; the rib-pressing cutter assembly 22 is provided with a rib-pressing rotary wheel that is adapted to the rib-pressing contour of the drum body.

[0049] The spinning forming method in this application achieves precise forming of the Hastelloy drum workpiece 12 through a four-step progressive spinning process, combined with suitable molds, tail-ends, and process parameters, along with differentiated heating schemes and specialized cutting tools. Specifically, the thinning and elongation process in step one ensures the stable forming of the protrusion 121 through local heating of a specific gun head combination and matching feed and clearance parameters; steps two and three rely on the drift-back combined toolpath and uniform heating of four propane guns to precisely machine the bottom 122 and the edge 123 structure; step four uses a small feed speed and interference clearance spinning, combined with overall mold heating and heating of the rib section 124, to solve the material springback problem. In addition, the addition of a specialized rounded corner cutting wheel and rib spinning wheel effectively alleviates the work hardening and stress concentration problems during the Hastelloy spinning process, significantly reduces defects such as cracks and tears, improves the forming accuracy and overall fit of various parts of the drum, and thus achieves high-quality forming of the drum.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In the description of this application, 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, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In this application, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" a first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] Although the description of this application has been made in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A spinning device for a Hastelloy drum body, the drum body comprising a main body (11) and a workpiece (12), the workpiece (12) being installed inside the main body (11); characterized in that, include: A die set consists of multiple independently set dies, each used to assist in spinning operations at different stages; The tail jack assembly includes multiple independently configured tail jacks, which are adapted to the mold and are used to assist in spinning processes by matching the mold with the tail jacks respectively. A main spindle mechanism, connected to the mold, is used to loosen and rotate the mold and the workpiece (12). The spinning mechanism includes an independently set main spinning knife assembly (21) and a rib-pressing knife assembly (22). Both the main spinning knife assembly (21) and the rib-pressing knife assembly (22) cooperate with the main spindle mechanism for spinning, in order to meet the spinning requirements of different positions of the workpiece (12) in different processes. as well as The heating mechanism includes multiple independently configured heating guns for heating different positions of the workpiece (12) and / or the mold in different processes.

2. The spinning device for Hastelloy drum bodies according to claim 1, characterized in that, The mold group includes a first mold (31), a second mold (32), and a third mold (33) that are set independently. The tail top group includes a first tail top (41), a second tail top (42), a third tail top (43), and a fourth tail top (44) that are set independently. The first mold (31) is adapted to the first tail top (41), the second mold (32) is adapted to the second tail top (42) and the third tail top (43) respectively, and the third mold (33) is adapted to the fourth tail top (44).

3. The spinning device for Hastelloy drum bodies according to claim 2, characterized in that, The first mold (31) includes a body (311) and a protrusion (312). The protrusion (312) protrudes from the middle of the body (311), and a fixing surface (313) is provided at one end of the protrusion (312) away from the body (311). The first tail top (41) is provided with a top pressing surface (411) and an inclined surface (412). The top pressing surface (411) is arranged opposite to the fixed surface (313). The inclined surface (412) is provided at the edge of the top pressing surface (411), and the inclined surface (412) is inclined from the end connected to the top pressing surface (411) to the end away from the top pressing surface (411) towards the central axis of the top pressing surface (411). When the first mold (31) and the first tail tip (41) work together, the protrusion (312) is used to spin the workpiece (12) through the main rotary cutter assembly (21) and the heating gun to form a protrusion (121).

4. The spinning device for Hastelloy drum bodies according to claim 3, characterized in that, The outer surface of the protrusion (312) is provided with a slow-rotating surface (314), which is inclined from one end near the top pressure surface (411) to the other end near the body (311) toward the central axis away from the top pressure surface (411).

5. The spinning device for Hastelloy drum bodies according to claim 3, characterized in that, The second mold (32) is provided with a groove (321), a spiral plane (322) and a spiral folding surface (323). The spiral plane (322) is connected to the edge of the groove (321), and the spiral folding surface (323) is connected to the end of the spiral plane (322) away from the groove (321). The second tail tip (42) is embedded in the groove (321), and the edge of the second tail tip (42) abuts against the inner wall of the groove (321) near the spiral plane (322); When the second mold (32) and the second tail top (42) work together, the groove (321) is used to place the protrusion (121) of the workpiece (12), and the rotating plane (322) is used to spin the workpiece (12) through the main rotating knife assembly (21) and the heating gun to form the bottom (122).

6. The spinning device for Hastelloy drum bodies according to claim 5, characterized in that, The third tail tip (43) is placed over the groove (321) and presses against the spiral plane (322); When the second mold (32) and the third tail tip (43) work together, the folding surface (323) is used to spin the workpiece (12) through the main swivel assembly (21) and the heating gun to form the edge (123).

7. The spinning device for Hastelloy drum bodies according to claim 6, characterized in that, The third mold (33) is provided with a storage slot (331), which is used to embed the main body (11). The interior of the main body (11) is in contact with the bottom (122) and the side (123) of the workpiece (12). The fourth tail top (44) includes a clearance part (441) and a pressing part (442). The pressing part (442) is provided on the edge of the clearance part (441). The clearance part (441) is provided with a clearance groove (443) corresponding to the protrusion (121) of the workpiece (12). The clearance groove (443) covers the protrusion (121) of the workpiece (12). The pressing part (442) is disposed abutting against the bottom (122) of the workpiece (12). When the third mold (33) and the fourth tail top (44) work together, the space between the clearance part (441) and the edge (123) of the workpiece (12) forms an operation area (5). The operation area (5) is used by the crimping knife assembly (22) to spin the edge (123) of the workpiece (12) to form multiple crimping parts (124).

8. A spinning forming method, characterized in that, Spinning using the spinning apparatus according to any one of claims 2-8, the spinning forming method includes the following steps: Process 1: Thinning and elongating of workpiece (12); The first mold (31) is installed on the main spindle mechanism, and the workpiece (12) is pushed against the first mold (31) by the first tail tip (41); The main spindle mechanism rotates, the heating gun heats the workpiece (12), and the main rotary cutter group spins and thins and elongates the workpiece (12) until the workpiece (12) is spun into a first-form workpiece (12), so that the first-form workpiece (12) has a protrusion (121). Step 2: Spinning the first form of workpiece (12) into the second form of workpiece (12): Remove the first mold (31) and install the second mold (32) on the spindle mechanism. Embed the first form of workpiece (12) into the second mold (32) and push the first form of workpiece (12) against the second mold (32) through the second tail tip (42). The spindle mechanism rotates, the heating gun heats the workpiece (12) at the required spinning point, and the main spinneret sets spin flatten the workpiece (12) until the first form of workpiece (12) is spun into the second form of workpiece (12), so that the second form of workpiece (12) has a bottom (122). Step 3: Spinning the second form of workpiece (12) into the third form of workpiece (12): Remove the second tail tip (42) and push the second form of workpiece (12) onto the bottom (122) through the third tail tip (43); the main spindle mechanism rotates, the heating gun heats the workpiece (12) at the required spinning point, and the main spinneret sets spin and bend the workpiece (12) until the second form of workpiece (12) is spun into the third form of workpiece (12), so that the third form of workpiece (12) has an edge (123). Step 4: Forming of the drum body: Replace the second mold (32) with the third mold (33) and install it on the main shaft mechanism. Place the main body (11) on the third mold (33) and place the workpiece (12) of the third form inside the main body (11). Then press the bottom (122) of the workpiece (12) with the fourth tail top (44). The heating gun heats the third mold (33) and the part to be spun respectively. The rib knife assembly (22) spun multiple ribs (124) on the edge (123) of the workpiece (12) so that the main body (11) and the workpiece (12) fit together to form a drum body.

9. The spinning forming method according to claim 8, characterized in that, In process one, the spindle mechanism rotates at 230 r / min, and multiple heating guns heat the workpiece (12) to 860°C-900°C. The pressure of the first tail tip (41) is 50 psi. In process two and process three, the spindle mechanism rotates at 230 r / min, and multiple heating guns heat the workpiece (12) to 860°C-900°C. The pressure of the second tail tip (42) and the third tail tip (43) is 50 psi. In process four, the spindle mechanism rotates at 130 r / min, and multiple heating guns are used to heat the mold for a continuous heating time of 2 minutes.

10. The spinning forming method according to claim 9, characterized in that, The main rotary cutter assembly (21) is provided with a rounded corner cutter wheel, the included angle of which is 75.5 degrees to 76.5 degrees; the rib-pressing cutter assembly (22) is provided with a rib-pressing rotary wheel that is adapted to the rib-pressing contour of the drum body.

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