A processing method of a belt profile thin-walled superalloy ultra-long inner cone welding assembly

Abstract

The application discloses a processing method of a band profile thin-wall high-temperature alloy super-long inner cone body welding assembly, which is divided into a first section, a second section and a third section along the height direction of the inner cone body welding assembly and from a large-diameter end to a small-diameter end of the inner cone body welding assembly. The installation edge and the inner cone body are welded first for the first section, the part of the inner cone body corresponding to the first section is welded after being butted with the installation edge, and then the first reinforcing hoop is welded on the inner wall of the part of the inner cone body corresponding to the first section. The second reinforcing hoop and the third reinforcing hoop are welded on the inner wall of the part of the inner cone body corresponding to the second section respectively for the second section. The fourth reinforcing hoop is welded on the inner wall of the part of the inner cone body corresponding to the third section for the third section. Finally, the first section and the second section are circumferentially argon-arc welded, and then the second section and the third section are circumferentially argon-arc welded. The application adopts the sectional scheme and the limiting clamp clamping and welding, meets the requirements of the size and shape precision, improves the processing efficiency of the whole welding assembly and effectively controls the welding deformation.

Description

Technical Field

[0001] This invention belongs to the field of welding technology, specifically relating to a processing method for a strip-shaped, thin-walled, high-temperature alloy ultra-long inner cone welding assembly. Background Technology

[0002] The high-temperature alloy inner cone welded assembly is a crucial component in aero-engines, contributing to improved intake efficiency and air compression ratio. The inner cone welded assembly is assembled from a mounting edge, an inner cone cylinder, and reinforcing hoops 1, 2, 3, and 4 using seam welding and argon arc welding. Its component structure is as follows: Figure 1 As shown. The inner conical cylinder is made of GH536 steel, with a height L1 = 1404.4 mm, a diameter ΦD1 = 660 mm at the large diameter end, a diameter ΦD = 120 mm at the small diameter end, and a material thickness of 1.5 mm. Technical requirements stipulate no more than 4 circumferential TIG welds and 2 evenly distributed axial TIG welds, with a profile profile tolerance of no more than 0.5. The component structure is as follows: Figure 2 As shown.

[0003] Since the inner conical cylinder is a thin-walled sheet metal part with a profiled surface and a height greater than 1400mm, the processing plan and quality of the inner conical cylinder are crucial to the entire welded assembly. If conventional processing methods are used to first process the inner conical cylinder and then weld the reinforcing hoops 1-4 and mounting edges, the seam welding machine cannot complete the positioning and welding of the reinforcing hoops. Initially, processing with four circumferential welds results in significant deformation of the parts. Manual argon arc welding requires constant adjustments to posture and electrode changes, affecting the continuity and stability of the welding speed, leading to poor weld quality and defects, reduced production efficiency, and extended processing time. Furthermore, when welding in a free state, the roundness and coaxiality of the inner conical cylinder are difficult to guarantee.

[0004] Based on the above reasons, it is necessary to consider the positional relationship between the pressure mechanism and electrode wheel structure of the seam welding machine on the production site and the internal weld reinforcement hoop of the cylinder. At the same time, the number of circumferential welds of the inner cone cylinder directly affects the processing difficulty of components such as the reinforcement hoop and the quality of the welded assembly. Therefore, it is necessary to improve the entire welding assembly processing plan and processing route. Summary of the Invention

[0005] This invention aims to provide a processing method for a thin-walled high-temperature alloy ultra-long inner cone welding assembly with a strip profile. The method employs reasonable segmented welding, careful design of the processing route, and quality control of the segmented circumferential welds to meet the quality requirements for part size and shape accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A method for fabricating a thin-walled, high-temperature alloy ultra-long inner cone welded assembly with a profiled surface includes: Step 1: Divide the inner conical welding assembly into three segments—the first segment, the second segment, and the third segment—along the height direction and from the large-diameter end to the small-diameter end. Where: The first section includes the mounting edge, the inner cone cylinder, the first reinforcing hoop, and the portion of the inner cone cylinder corresponding to the first section; The second section includes the part of the inner conical cylinder corresponding to the second section, the second reinforcing hoop, and the third reinforcing hoop; The third section includes the inner conical cylinder corresponding to the third section and the fourth reinforcing hoop; Step 2: Weld the mounting edge and the inner cone body together, then weld the part of the inner cone body corresponding to the first section to the mounting edge together, and then weld the first reinforcing hoop onto the inner wall of the part of the inner cone body corresponding to the first section. Step 3: Weld the second and third reinforcing hoops onto the inner wall of the corresponding second section of the inner cone cylinder; Step four: Weld the fourth reinforcing hoop onto the inner wall of the section corresponding to the third segment of the inner cone cylinder; Step 5: Perform circumferential argon arc welding on the first and second sections, then perform circumferential argon arc welding on the second and third sections.

[0007] Alternatively, in step five, a circumferential weld seam limiting fixture is used for clamping during the circumferential argon arc welding of the first and second sections, as well as the second and third sections. The circumferential weld seam limiting fixture includes: Base plate; Pressure plates and positioning blocks are paired together for clamping and positioning of the mounting edge. Multiple sets of pressure plates and positioning blocks are evenly distributed on the same circumference of the same side end face of the base plate, and the center of the circumference is the center of the base plate. Connecting columns, the first end of which is vertically mounted on the base plate, and multiple connecting columns with equal central angles are evenly distributed on the same circumference with the center of the base plate as the center; The middle disc is disc-shaped and parallel to the base plate. The second ends of multiple connecting columns penetrate the middle disc vertically and extend away from the middle disc. The upper cylinder is a cylindrical rotating body, and the first axial end of the upper cylinder is connected to the second end of multiple connecting columns. A pull rod, which passes through the middle disc and the upper cylinder and is coaxially arranged with the middle disc and the upper cylinder; The first tapered sleeve is fitted onto the pull rod near the upper cylinder, and the outer surface of the first tapered sleeve includes a first cylindrical surface and a first outer tapered surface that are coaxially arranged. The second tapered sleeve is fitted onto the pull rod near the middle disc. The outer surface of the second tapered sleeve includes a second cylindrical surface and a second outer tapered surface that are coaxially arranged. The first expansion block, a plurality of the first expansion blocks are slidably connected to the axial end face of the middle disk along the radial direction of the middle disk. The end surface of the first expansion block near the pull rod is provided with a first inner cylindrical surface and a first inner conical surface. The first inner cylindrical surface mates with the second cylindrical surface on the second conical sleeve, and the first inner conical surface mates with the second outer conical surface. The end surface of the first expansion block away from the pull rod is provided with a protective gas vent and an expansion surface. The second expansion block, a plurality of the second expansion blocks are slidably connected to the axial end face of the upper cylinder along the radial direction of the upper cylinder. The end surface of the second expansion block near the pull rod is provided with a second inner cylindrical surface and a second inner conical surface. The second inner cylindrical surface mates with the first cylindrical surface on the first conical sleeve, and the second inner conical surface mates with the first outer conical surface. The end surface of the second expansion block away from the pull rod is provided with a protective gas vent and an expansion surface. The first spring, having at least two springs, one of which is wound in a ring around the outer surface of a plurality of first expansion blocks, providing a force for the plurality of first expansion blocks to move toward the pull rod; the other spring is wound in a ring around the outer surface of a plurality of second expansion blocks, providing a force for the plurality of second expansion blocks to move toward the pull rod. A pressure cap, which is sleeved on the end of the pull rod away from the base plate, is used to support the small-diameter end opening of the inner cone cylinder.

[0008] As one solution: The first expansion block includes a first main expansion block and a first secondary expansion block. The first main expansion block and the first secondary expansion block slide in cooperation with the middle disk along the same radial line on the end face of the middle disk. The first main expansion block is provided with a first inner cylindrical surface and a first inner conical surface. The first secondary expansion block is provided with a protective gas vent and an expansion surface. Both the first main expansion block and the first secondary expansion block are provided with protective gas channels. The protective gas channel on the first secondary expansion block is connected to the protective gas vent. When the first main expansion block expands outward and docks with the first secondary expansion block, the protective gas channels of the two are connected through the interfaces distributed on the docking surfaces of the two. The second expansion block includes a second main expansion block and a second secondary expansion block. The second main expansion block and the second secondary expansion block slide in contact with the upper cylinder along the same radial line on the end face of the upper cylinder. The second main expansion block is provided with a second inner cylindrical surface and a second inner conical surface. The second secondary expansion block is provided with a protective gas vent and an expansion surface. Both the second main expansion block and the second secondary expansion block are provided with protective gas channels. The protective gas channels on the second secondary expansion block are connected to the protective gas vent. When the second main expansion block expands outward and docks with the second secondary expansion block, the protective gas channels of the two are connected through the interfaces distributed on the docking surfaces of the two.

[0009] Furthermore, the clamping of the first, second, and third sections using a circumferential weld seam limiting fixture includes: Step 1: Assemble the first section after welding onto the circumferential weld seam limiting fixture, with the mounting edge attached to the positioning block, and then press the mounting edge tightly with a pressure plate. Step 2: Insert the completed second section into the circumferential weld limiting fixture and mate it with the first section. The mate position is the large diameter end of the inner conical cylinder in the second section corresponding to the second section and the small diameter end of the inner conical cylinder in the first section corresponding to the first section, ensuring that the mate position falls within the expansion surface range of the first expansion block. Step 3: Insert the completed welding third section into the circumferential weld limiting fixture and mate it with the second section. The mate position is the large diameter end of the inner conical cylinder in the third section corresponding to the third section and the small diameter end of the inner conical cylinder in the second section corresponding to the second section, ensuring that the mate position falls within the expansion surface range of the second expansion block. Step 4: Insert the pressure cap into the smaller diameter end of the inner cone cylinder of the third section, corresponding to the third section.

[0010] As one embodiment, the pull rod is connected to the hydraulic cylinder of the automatic welding machine. When the hydraulic cylinder of the automatic welding machine drives the pull rod to move axially towards the first end, the first cylindrical surface of the first tapered sleeve cooperates with the second inner cylindrical surface of the second expansion block to achieve the outward expansion of the second expansion block; the second cylindrical surface of the second tapered sleeve cooperates with the first inner cylindrical surface of the first expansion block to achieve the outward expansion of the first expansion block. When the hydraulic cylinder of the automatic welding machine drives the pull rod to move towards the second end in the axial direction, the first outer conical surface of the first conical sleeve cooperates with the second inner conical surface of the second expansion block and the first spring to realize the inward retraction of the second expansion block; the second outer conical surface of the second conical sleeve cooperates with the first inner conical surface of the first expansion block and the first spring to realize the inward retraction of the first expansion block.

[0011] As an alternative, in step three, When welding the third reinforcing hoop onto the inner wall of the part of the inner cone cylinder corresponding to the second section, the welding position of the third reinforcing hoop is located by the distance from the large-diameter end of the third reinforcing hoop to the large-diameter end of the part of the inner cone cylinder corresponding to the second section. When welding the second reinforcing hoop onto the inner wall of the portion of the inner cone-shaped cylinder corresponding to the second section, the welding position of the second reinforcing hoop is determined by the distance from the large-diameter end of the second reinforcing hoop to the large-diameter end of the portion of the inner cone-shaped cylinder corresponding to the second section.

[0012] Alternatively, in step four, when welding the fourth reinforcing hoop onto the inner wall of the portion corresponding to the third section of the inner conical cylinder, the welding position of the fourth reinforcing hoop is determined by the distance from the large-diameter end of the fourth reinforcing hoop to the large-diameter end of the portion corresponding to the third section of the inner conical cylinder.

[0013] Compared with existing technologies, this invention proposes a processing method for a thin-walled high-temperature alloy ultra-long inner cone welding assembly with a profiled surface. It employs a rational segmented welding process, a scientific processing scheme, and a one-time clamping and positioning automatic welding using a circumferential weld seam limiting fixture, ensuring the welding quality and coaxiality of the conical surface of the part. The use of a circumferential weld seam limiting fixture in a tightened cooling state effectively controls welding deformation, guaranteeing the processing quality of the inner cone welding assembly to meet the quality requirements for part size and shape accuracy, while simultaneously improving the overall processing efficiency and part quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the inner cone welding assembly structure in this invention; Figure 2 This is a schematic diagram of the inner conical cylinder structure in this invention; Figure 3 This is a schematic diagram of the inner conical cylinder section h1 structure in this invention; Figure 4 This is a schematic diagram of the inner conical cylinder section h2 structure in this invention; Figure 5 This is a schematic diagram of the inner conical cylinder section h3 structure in this invention; Figure 6 This is a schematic diagram of the circumferential weld seam limiting fixture structure in this invention; In the diagram: 1. Base plate; 2. Pressure plate; 3. Positioning block; 4. Connecting column; 5. First main insert; 6. First secondary insert; 7. First main expansion block; 8. First secondary expansion block; 9. Guide block; 10. Upper cylinder; 11. Second main insert; 12. Second secondary insert; 13. Three-way air nozzle; 14. Pressure cap; 15. Air nozzle; 16. Bushing; 17. Cover plate; 18. First spring; 19. First conical sleeve; 20. Second main expansion block; 21. Second secondary expansion block; 22. Connecting pipe; 23. Second conical sleeve; 24. Tie rod; 25. Shock absorber; 26. Shaft; 27. Middle disc; 28. First nut; 29. ​​Connecting nut 30. Second nut; 31. Connector; 32. Locating plug; 33. Screw; 34. First screw; 35. Second spring; 36. First cylindrical pin; 37. Second screw; 38. Third screw; 39. Second cylindrical pin; 40. Fourth screw; 41. Bolt; 42. Fifth screw; 43. Stud; 44. Third nut; 45. Support; 46. Fourth nut; 47. Sixth screw; 48. Third spring; 49. Vent hose; 50. Seventh screw; 51. Rotating washer; 52. Fifth nut; 53. Paper washer; 54. Eighth screw; 55. Sixth nut; 56. Third cylindrical pin. Detailed Implementation

[0015] The present invention will be further described below with reference to specific embodiments, but it should not be construed as limiting the scope of the subject matter of the present invention to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0016] The basic idea of ​​the processing method for the ultra-long inner cone welding assembly in this invention is as follows: (1) Segmentation of the inner conical cylinder: Considering the actual production seam welding equipment and the positional relationship of the reinforcing hoop seam welds on site, and taking into account that the fewer the number of welds, the more complete the structure and the higher the manufacturing precision, thus improving the quality and performance of the product; therefore, the optimal number of circumferential welds is 2, that is, the inner conical cylinder along the axial direction ( Figure 1 The inner cone cylinder (in the L direction) is divided into three sections: h1, h2, and h3. (2) Design of processing route: First, weld the installation edge, inner cone cylinder, reinforcing hoop 1, and inner cone cylinder section h1 according to the assembly position relationship and welding requirements. Similarly, weld reinforcing hoop 2 and reinforcing hoop 3 to the inner walls of the large and small ends of the inner cone cylinder section h2 respectively, and weld reinforcing hoop 4 to the inner wall of the large end of the inner cone cylinder section h3. (3) Fixture design and manufacturing: Design a special limiting fixture for the circumferential weld according to the segmentation of the inner cone cylinder, and manufacture and assemble the automatic welding limiting fixture according to the design drawings; such as Figure 6 As shown, the circumferential seam welding limiting fixture designed in this invention includes: a base plate 1, a pressure plate 2, a positioning block 3, a connecting column 4, a first main insert 5, a first secondary insert 6, a first main expansion block 7, a first secondary expansion block 8, a guide block 9, an upper cylinder 10, a second main insert 11, a second secondary insert 12, a three-way air nozzle 13, a pressure cap 14, an air nozzle 15, a bushing 16, a cover plate 17, a first spring 18, a first conical sleeve 19, a second main expansion block 20, a second secondary expansion block 21, a connecting pipe 22, a second conical sleeve 23, a pull rod 24, a shock-absorbing pad 25, a shaft 26, a middle disc 27, and a first nut 28. The following components are included: connecting nut 29, second nut 30, connector 31, positioning plug 32, screw 33, first screw 34, second spring 35, first cylindrical pin 36, second screw 37, third screw 38, second cylindrical pin 39, fourth screw 40, bolt 41, fifth screw 42, stud 43, third nut 44, support 45, fourth nut 46, sixth screw 47, third spring 48, vent hose 49, seventh screw 50, rotating washer 51, fifth nut 52, paper washer 53, eighth screw 54, sixth nut 55, and third cylindrical pin 56. The base plate 1, connecting column 4, middle disc 27, and upper cylinder 10 constitute the main frame of the limiting fixture; the remaining parts are assembled onto this main body.

[0017] Working principle of the circumferential weld seam limiting fixture: The left end of the connector 31 of the circumferential automatic welding limiting fixture is connected to the hydraulic cylinder of the automatic argon arc welding machine, and the right end is connected to the second nut 30, connecting nut 29, first nut 28, pull rod 24, second tapered sleeve 23 (fixed by the third cylindrical pin 56), and first tapered sleeve 19 (the first tapered sleeve 19 is welded to the connecting pipe 22, the connecting pipe 22 is sleeved on the pull rod 24, and the connecting pipe 22 is a sleeve structure). The hydraulic cylinder of the automatic argon arc welding machine controls the axial movement of the connector 31, which drives the second tapered sleeve 23 and the first tapered sleeve 19 to slide together. The outer conical and cylindrical surfaces of the tapered sleeve 19 convert the axial movement of the pull rod 24 into radial movement of the expansion blocks (referring to the first main expansion block 7, the first secondary expansion block 8, the second main expansion block 20, and the second secondary expansion block 21) on the end faces of the middle disc 27 and the upper cylinder 10. The direction of movement of the expansion blocks is restricted by the guide block 9. The middle disc 27 is provided with the first main expansion block 7 and the first secondary expansion block 8. The first secondary expansion block 8 is located outside the first main expansion block 7 and is pushed by the first main expansion block 7. The upper cylinder 10 is provided with the second main expansion block 20 and the second secondary expansion block 21. The second secondary expansion block 21 is located outside the second main expansion block 20 and is pushed by the second main expansion block 20. The first main expansion block 7 is inlaid with the first main insert 5, which has protective gas vent holes and protective gas channels. The first secondary expansion block 8 is inlaid with the first secondary insert 6, which has protective gas vent holes and protective gas channels. Similarly, a second main insert 11 is embedded in the second main expansion block 20, and the second main insert 11 has a protective gas vent hole and a protective gas channel. A second secondary insert 12 is embedded in the second secondary expansion block 21, and the second secondary insert 12 has a protective gas vent hole and a protective gas channel. Figure 6 As shown, at this time, the outer conical surfaces of the second conical sleeve 23 and the first conical sleeve 19 are offset from the inner conical surfaces of the first main expansion block 7 and the second main expansion block 20. Through the engagement of the cylindrical surfaces of the second conical sleeve 23 and the first conical sleeve 19 with the cylindrical surfaces of the first main expansion block 7 and the second main expansion block 20, the first main expansion block 7 and the second main expansion block 20 are pushed radially outward, thereby causing the first main expansion block 7 to abut and tighten with the first secondary expansion block 8, and the second main expansion block 20 to abut and tighten with the second secondary expansion block 21. At this time, the protective gas can flow through the first main insert 5 and the first secondary insert 6, the second main insert 11 and the second secondary insert 12 at the mating surfaces. Because the expansion blocks are relatively large, for ease of processing, the portion of the expansion block containing the protective gas channel is separated as an insert, processed separately, and then reassembled onto the expansion block.

[0018] (4) Clamping of segmented cylinders: Clamp the inner cone cylinder segment h1, which has been installed and welded with the inner cone cylinder, on the reference surface of the positioning block 3 of the automatic welding limit fixture. Press the pressure plate 2 evenly through the slot of the inner cone cylinder segment h1 to press the inner end face of the installation side, so that it is fixed on the limit automatic welding fixture. Then, connect the large end of the inner cone cylinder segment h2 with the small end of the inner cone cylinder segment h1, and connect the large end of the inner cone cylinder segment h3 with the small end of the inner cone cylinder segment h2. Press the small end of the inner cone cylinder segment h3 with the pressure cap 14 to limit the mating surfaces of the three inner cone cylinder segments so that they fit tightly. (5) Welding of circumferential welds: Input welding parameters into the automatic argon arc welding machine and start the automatic argon arc welding machine to perform automatic argon arc welding on the circumferential weld between the inner cone cylinder section h1 and the inner cone cylinder section h2. Similarly, weld the circumferential weld between the inner cone cylinder section h2 and the inner cone cylinder section h3.

[0019] (6) Disassembling the welding assembly: After welding, keep the part in the upper limit position of the fixture for 20 to 30 minutes. After the part cools down, remove the pressure plate 2, expansion block and other limit clamps, and remove the inner cone welding assembly.

[0020] See Figures 1-6 The processing method of the strip-shaped thin-walled high-temperature alloy ultra-long inner cone welding assembly of the present invention includes the following steps: Step 1: Segmentation of the Inner Conical Cylinder: Considering the actual on-site production seam welding equipment and the position of the reinforcing hoop seam weld, and taking into account that fewer welds result in a more complete structure, higher manufacturing precision, and improved product quality and performance, the optimal number of circumferential welds is two. This divides the inner conical cylinder into three segments: h1, h2, and h3, i.e., h1 = 470mm, h2 = 470mm, and h3 = 464.4mm. This segmented processing not only effectively controls the part's profile but also ensures the accuracy of the reinforcing hoop welding position and the welding quality. The segmented part structure is as follows: Figure 3 , Figure 4 , Figure 5 As shown; if one circumferential weld is used, the height of the cone-shaped cylinder in the segment is more than 700 mm, which makes it difficult to control the shape of the part during processing. At the same time, due to the influence of the welder structure, it is difficult to accurately position and weld the reinforcing hoop inside the cone-shaped cylinder in the segment. Step 2: Processing Route Design: First, assemble the mounting edge and inner conical cylinder and weld them according to seam welding requirements, ensuring the distance from the assembly position to the bottom surface of the mounting edge is L6. Then, connect the inner conical cylinder section h1 to the mounting edge and weld according to technical requirements, ensuring the distance from the connection point to the bottom surface of the mounting edge is L7, i.e., L7 = 2mm. Finally, weld reinforcing hoop 1 to the inner wall of the inner conical cylinder section h1 according to seam welding requirements, ensuring the distance from the large end of reinforcing hoop 1 to the bottom surface of the mounting edge is L5. Weld reinforcing hoop 3 to the inner wall of the small end of the inner conical cylinder section h2 according to seam welding requirements, ensuring the distance from the large end of reinforcing hoop 3 to the inner conical cylinder section h2 is L5. The distance between the large ends is L3-h1-L7; similarly, the reinforcing hoop 2 is welded to the inner wall of the large end of the inner conical cylinder h2 section, ensuring that the distance from the large end of the reinforcing hoop 2 to the large end of the inner conical cylinder h2 is L4-h1-L7; the reinforcing hoop 4 is welded to the inner wall of the large end of the inner conical cylinder h3 section according to the seam welding technical requirements, ensuring that the distance from the large end of the reinforcing hoop 4 to the large end of the inner conical cylinder h3 section is L2-h2-h1-L7; the above segmented processing method not only facilitates the welding of components such as the installation edge and reinforcing hoop, but also increases the structural strength of each section of the inner conical cylinder and controls the deformation of each thin-walled inner conical cylinder in the free state; Step 3: Fixture Design and Manufacturing: Based on the segmented design of the inner cone cylinder, the following fixture was adopted: Figure 6 The circumferential weld seam limiting fixture shown is manufactured and assembled according to the design drawing requirements. During assembly, it is necessary to ensure that the flatness of each positioning block 3 (6 locations) and the bottom surface of the base plate 1 is not greater than 0.1mm, and at the same time, ensure that H1=h1+L7, H2=h1+h2+L7; the working principle of the limiting fixture: the left end of the connecting head 31 of the circumferential automatic welding limiting fixture is connected to the hydraulic cylinder of the automatic argon arc welding machine, and the right end is connected to the second nut 30, connecting nut 29, first nut 28 and pull rod 24, and the second cone sleeve 23 and the first cone sleeve 19. The hydraulic cylinder of the automatic argon arc welding machine controls the connecting head 31 to move axially, driving the second cone sleeve 23 and the first cone sleeve 19 to slide axially together; when the connecting head 31 moves to the left axially ( Figure 6 (From center to left), the second cone sleeve 23 and the first cone sleeve 19 move to the left, and the axial movement is converted into radial movement of the expansion block through the cone surface and the cylindrical surface, which plays the role of tightening the inner cone cylinder. Conversely, the expansion block shrinks. When the limiting clamp is in the tightened state, the outer diameter of the expansion surface of the first expansion block 8 should be the inner diameter of the small end of the inner cone cylinder h1 section Φd1, the outer diameter of the expansion surface of the second expansion block 21 should be the inner diameter of the small end of the inner cone cylinder h2 section Φd, and the outer diameter of the gland 14 and the small end of the inner cone cylinder h3 section should be the inner diameter of the small end of the inner cone cylinder h3 section ΦD. The coaxiality and runout of the limiting clamp are not greater than 0.1mm. Step 4: Clamping of the segmented cylinder: Clamp the inner conical cylinder segment h1, which has been installed and welded with the inner conical cylinder body, onto the reference surface of the positioning block 3 (six locations) of the automatic welding limit fixture. Evenly press the pressure plate 2 (six locations), support 45 (six locations, support 45 is the bolt), stud 43 (six locations), stud 43, and third nut 44 onto the inner conical cylinder segment h1 through the groove position on the inner conical cylinder segment h1 to fix it on the limit automatic welding fixture; then connect the large end of the inner conical cylinder segment h2 to the inner conical cylinder segment h1. The small end of segment h3 is connected to the large end of segment h2 of the inner conical cylinder. The pressure cap 14 is fitted with bushing 16, seventh screw 50, rotating washer 51, and fifth nut 52. By tightening the fifth nut 52, the joint surfaces of the three segments of the inner conical cylinder are tightly limited and pressed together. When the limiting clamp is in the tightened state, it is necessary to ensure that the gap at the joint of the circumferential weld is not greater than 0.15mm and the misalignment is not greater than 0.1mm. At the same time, the three segments of the inner conical cylinder are clamped in one limiting clamping to ensure the coaxiality and deformation of the welded parts. Step 5: Welding of the circumferential weld: Input welding parameters into the automatic TIG welding machine, including the filler metal and diameter, argon flow rate (L / min), tungsten electrode diameter, current (A), and welding speed (m / min). Start the automatic TIG welding machine to perform automatic TIG welding on the circumferential weld between the inner conical cylinder section h1 and section h2. Similarly, weld the circumferential weld between the inner conical cylinder section h2 and section h3. The argon flow rate shielding gas is through nozzle 15, and then through the three-way nozzle 13 (at position 12). Figure 6 The tie rod 24 near the pressure cap 14 and the vent hose 49 (28 locations) are respectively connected to the vent grooves (protective gas channels) of each expansion block (first main expansion block 7, first secondary expansion block 8, second main expansion block 20, and second secondary expansion block 21) for venting protection; Step 6: Disassemble the welding assembly: After welding, hold the part in the upper limit position of the fixture for 20-30 minutes. After the part cools down, loosen the fifth nut 52 and remove the pressure cap 14 and bushing 16; at the same time, the hydraulic cylinder of the automatic welding machine controls the connector 31 to move axially to the right, driving the second tapered sleeve 23 and the first tapered sleeve 19 to the right ( Figure 6 Slide from center to right, causing the cylindrical surfaces of the second cone sleeve 23 and the first cone sleeve 19 to separate from the cylindrical surface of the expansion block (at this time, the outer cone surfaces of the second cone sleeve 23 and the first cone sleeve 19 are engaged with the outer cone surface of the expansion block). Under the contraction action of the first spring 18, the expansion block moves radially and contracts away from the inner wall of the inner cone cylinder. After removing the pressure plate 2 (six places), the inner cone welding assembly is removed, and the welding is completed.

[0021] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of the invention have been described above to facilitate understanding by those skilled in the art, it should be understood that the invention is not limited to the scope of the specific embodiments. Various modifications are readily apparent to those skilled in the art as long as they fall within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions utilizing the concept of this invention are protected.

Claims

1. A method for processing a thin-walled high-temperature alloy ultra-long inner cone welding assembly with a strip profile, characterized in that, include: Step 1: Divide the inner conical welding assembly into three segments—the first segment, the second segment, and the third segment—along the height direction and from the large-diameter end to the small-diameter end. Where: The first section includes the mounting edge, the inner cone cylinder, the first reinforcing hoop, and the portion of the inner cone cylinder corresponding to the first section; The second section includes the part of the inner conical cylinder corresponding to the second section, the second reinforcing hoop, and the third reinforcing hoop; The third section includes the inner conical cylinder corresponding to the third section and the fourth reinforcing hoop; Step 2: Weld the mounting edge and the inner cone body together, then weld the part of the inner cone body corresponding to the first section to the mounting edge together, and then weld the first reinforcing hoop onto the inner wall of the part of the inner cone body corresponding to the first section. Step 3: Weld the second and third reinforcing hoops onto the inner wall of the corresponding second section of the inner cone cylinder; Step four: Weld the fourth reinforcing hoop onto the inner wall of the section corresponding to the third segment of the inner cone cylinder; Step 5: Perform circumferential argon arc welding on the first and second sections, then perform circumferential argon arc welding on the second and third sections. In step five, a circumferential weld seam limiting fixture is used for clamping during the circumferential argon arc welding of the first and second sections, as well as the second and third sections. The circumferential weld seam limiting fixture includes: Base plate (1); Pressure plate (2) and positioning block (3), one pressure plate (2) and one positioning block (3) are paired together for pressing and positioning of the installation edge. Multiple sets of pressure plates (2) and positioning blocks (3) are evenly distributed on the same circumference of the same side end face of the base plate (1), and the center of the circumference is the center of the base plate (1). Connecting column (4), the first end of the connecting column (4) is vertically installed on the base plate (1), and multiple connecting columns (4) are evenly distributed on the same circumference with the center of the base plate (1) as the center; The middle disc (27) is disc-shaped and parallel to the bottom plate (1). The second ends of multiple connecting columns (4) penetrate the middle disc (27) vertically and extend away from the middle disc (27). Upper cylinder (10), the upper cylinder (10) is a cylindrical rotating body, and the first axial end of the upper cylinder (10) is connected to the second end of multiple connecting columns (4); A pull rod (24) passes through the middle disc (27) and the upper cylinder (10) and is coaxially arranged with the middle disc (27) and the upper cylinder (10); The first conical sleeve (19) is sleeved on the pull rod (24) near the upper cylinder (10), and the outer surface of the first conical sleeve (19) includes a first cylindrical surface and a first outer conical surface arranged coaxially; The second conical sleeve (23) is sleeved on the pull rod (24) near the middle disc (27). The outer surface of the second conical sleeve (23) includes a second cylindrical surface and a second outer conical surface arranged coaxially. The first expansion block, a plurality of the first expansion blocks are slidably connected to the axial end face of the middle disk (27) along the radial direction of the middle disk (27). The end surface of the first expansion block near the pull rod (24) is provided with a first inner cylindrical surface and a first inner conical surface. The first inner cylindrical surface is engaged with the second cylindrical surface on the second conical sleeve (23). The first inner conical surface is engaged with the second outer conical surface. The end surface of the first expansion block away from the pull rod (24) is provided with a protective gas vent and an expansion surface. The second expansion block, a plurality of the second expansion blocks are slidably connected to the axial end face of the upper cylinder (10) along the radial direction of the upper cylinder (10). The end surface of the second expansion block near the pull rod (24) is provided with a second inner cylindrical surface and a second inner conical surface. The second inner cylindrical surface is engaged with the first cylindrical surface on the first conical sleeve (19). The second inner conical surface is engaged with the first outer conical surface. The end surface of the second expansion block away from the pull rod (24) is provided with a protective gas vent and an expansion surface. The first spring (18) has at least two springs, one of which is wound in a ring around the outer surface of a plurality of first expansion blocks, providing a force for the plurality of first expansion blocks to move toward the pull rod (24), and the other is wound in a ring around the outer surface of a plurality of second expansion blocks, providing a force for the plurality of second expansion blocks to move toward the pull rod (24); A pressure cap (14) is fitted onto the end of the pull rod (24) away from the bottom plate (1) and is used to support the small diameter end opening of the inner cone cylinder.

2. The processing method of a strip-shaped thin-walled high-temperature alloy ultra-long inner cone welding assembly according to claim 1, characterized in that: The first expansion block includes a first main expansion block (7) and a first secondary expansion block (8). The first main expansion block (7) and the first secondary expansion block (8) slide in cooperation with the middle disk (27) along the same radial line on the end face of the middle disk (27). The first main expansion block (7) is provided with a first inner cylindrical surface and a first inner conical surface. The first secondary expansion block (8) is provided with a protective gas vent and an expansion surface. Both the first main expansion block (7) and the first secondary expansion block (8) are provided with protective gas channels. The protective gas channels on the first secondary expansion block (8) are connected to the protective gas vent. When the first main expansion block (7) expands outward and docks with the first secondary expansion block (8), the protective gas channels of the two are connected through the interfaces distributed on the docking surfaces of the two. The second expansion block includes a second main expansion block (20) and a second secondary expansion block (21). The second main expansion block (20) and the second secondary expansion block (21) slide in cooperation with the upper cylinder (10) along the same radial line on the end face of the upper cylinder (10). The second main expansion block (20) is provided with a second inner cylindrical surface and a second inner conical surface. The second secondary expansion block (21) is provided with a protective gas vent and an expansion surface. Both the second main expansion block (20) and the second secondary expansion block (21) are provided with protective gas channels. The protective gas channels on the second secondary expansion block (21) are connected to the protective gas vent. When the second main expansion block (20) expands outward and docks with the second secondary expansion block (21), the protective gas channels of the two are connected through the interfaces distributed on the docking surfaces of the two.

3. The processing method of a strip-shaped thin-walled high-temperature alloy ultra-long inner cone welding assembly according to claim 1, characterized in that: In step five, the circumferential weld seam limiting fixture is used for clamping during the circumferential argon arc welding of the first and second sections, as well as the second and third sections. Step 1: Assemble the first section of the welded section onto the circumferential weld limit fixture, wherein the mounting edge is attached to the positioning block (3), and then the mounting edge is pressed tightly by the pressure plate (2); Step 2: Insert the completed second section into the circumferential weld limiting fixture and mate it with the first section. The mate position is the large diameter end of the inner conical cylinder in the second section corresponding to the second section and the small diameter end of the inner conical cylinder in the first section corresponding to the first section, ensuring that the mate position falls within the expansion surface range of the first expansion block. Step 3: Insert the completed welding third section into the circumferential weld limiting fixture and mate it with the second section. The mate position is the large diameter end of the inner conical cylinder in the third section corresponding to the third section and the small diameter end of the inner conical cylinder in the second section corresponding to the second section, ensuring that the mate position falls within the expansion surface range of the second expansion block. Step 4: Insert the cap (14) into the small diameter end of the inner cone cylinder of the third section corresponding to the third section.

4. The processing method of a strip-shaped thin-walled high-temperature alloy ultra-long inner cone welding assembly according to claim 1, characterized in that: The pull rod (24) is connected to the hydraulic cylinder of the automatic welding machine. When the hydraulic cylinder of the automatic welding machine drives the pull rod (24) to move towards the first end in the axial direction, the first outer conical surface of the first conical sleeve (19) cooperates with the second inner conical surface of the second expansion block to realize the outer expansion of the second expansion block; the second outer conical surface of the second conical sleeve (23) cooperates with the first inner conical surface of the first expansion block to realize the outer expansion of the first expansion block; When the hydraulic cylinder of the automatic welding machine drives the pull rod (24) to move towards the second end in the axial direction, the first outer conical surface of the first conical sleeve (19) cooperates with the second inner conical surface of the second expansion block and the first spring (18) to realize the inward shrinkage of the second expansion block; the second outer conical surface of the second conical sleeve (23) cooperates with the first inner conical surface of the first expansion block and the first spring (18) to realize the inward shrinkage of the first expansion block.

5. The processing method of a strip-shaped thin-walled high-temperature alloy ultra-long inner cone welding assembly according to claim 1, characterized in that: In step three When welding the third reinforcing hoop onto the inner wall of the part of the inner cone cylinder corresponding to the second section, the welding position of the third reinforcing hoop is located by the distance from the large-diameter end of the third reinforcing hoop to the large-diameter end of the part of the inner cone cylinder corresponding to the second section. When welding the second reinforcing hoop onto the inner wall of the portion of the inner cone-shaped cylinder corresponding to the second section, the welding position of the second reinforcing hoop is determined by the distance from the large-diameter end of the second reinforcing hoop to the large-diameter end of the portion of the inner cone-shaped cylinder corresponding to the second section.

6. The processing method of a strip-shaped thin-walled high-temperature alloy ultra-long inner cone welding assembly according to claim 1, characterized in that: In step four, when welding the fourth reinforcing hoop onto the inner wall of the portion corresponding to the third section of the inner conical cylinder, the welding position of the fourth reinforcing hoop is determined by the distance from the large-diameter end of the fourth reinforcing hoop to the large-diameter end of the portion corresponding to the third section of the inner conical cylinder.

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