Field designing and machining method for heat treatment tray for large-diameter arc-shaped thin-wall forge piece
By designing a frame structure heat treatment tray, the problem of heat treatment and hoisting transfer of large-diameter arc-shaped thin-walled forgings in a vertical state was solved, achieving stable support and safe storage, and improving processing accuracy and adaptability.
Patent Information
- Application Number
- CN202511131399.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-13
- Publication Date
- 2025-11-18
AI Technical Summary
Existing technologies are difficult to effectively perform heat treatment on large-diameter, arc-shaped, thin-walled forgings, especially during vertical lifting, transfer, and storage, leading to damage and instability issues.
A frame structure heat treatment tray was designed, including a support plate, a support auxiliary plate, a main support beam, an auxiliary support beam, and a triangular fixing block. It is assembled and welded and then precision machined to ensure that the forging remains vertical during heat treatment, hoisting, and storage. 12Cr2Mo1V material is used to improve stability and strength.
It achieves stable support and safe hoisting of large-diameter arc-shaped thin-walled forgings during heat treatment, reduces the risk of damage, improves machining accuracy and adaptability, and is suitable for the design of support devices for large irregular forgings.
Smart Images
Figure CN120962289A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of mechanical manufacturing, and particularly relates to a heat treatment tray on-site design and processing method for a large-diameter arc-shaped thin-wall forged piece. BACKGROUND
[0002] With the rapid development of heavy equipment manufacturing industry, many forgings for large-scale equipment have higher requirements on the shape and material properties. Even some multifunctional test equipment has never-before-seen requirements on the uniformity of material quality and the stability of shape.
[0003] Performance heat treatment is one of the important factors affecting the comprehensive quality of materials. How to perform performance heat treatment on large forgings is an important factor affecting the uniformity of material quality and stress distribution. Exploring a more ideal heat treatment method is the goal that technical personnel in the industry pursue relentlessly.
[0004] Currently, steel plate quenching water cooling is mostly in the form of flat spraying or immersion. However, it is very difficult to perform flat spraying or immersion quenching on a large-diameter arc-shaped thin-wall forged piece with a size of an outer diameter of φ11000mm, an inner diameter of φ3500mm and a thickness of 220mm. If the large-diameter arc-shaped thin-wall forged piece needs to be heated after being erected, hoisted, transferred and then quenched, it is even more difficult.
[0005] At present, it is urgent to develop a heat treatment tray on-site design and processing method for a large-diameter arc-shaped thin-wall forged piece. SUMMARY
[0006] The technical problem to be solved by the application is to provide a heat treatment tray on-site design and processing method for a large-diameter arc-shaped thin-wall forged piece.
[0007] The heat treatment tray on-site design and processing method for a large-diameter arc-shaped thin-wall forged piece comprises the following steps: S10. analyzing the shape characteristics of the arc-shaped plate-shaped forged piece; The arc-shaped plate-shaped forged piece has a size of an outer diameter of φ11000mm, an inner diameter of φ3500mm and a thickness of 220mm, and is a large-diameter arc-shaped thin-wall forged piece; S20. analyzing the related process flow of the large-diameter arc-shaped thin-wall forged piece; The large-diameter arc-shaped thin-wall forged piece needs to be heat treated in a vertical state; after the heat treatment is completed, it needs to be hoisted and transferred for water cooling quenching; and after the water cooling quenching is completed, it needs to be stored in a vertical state on a daily basis; S30. analyzing the functional requirements of the heat treatment tray; Auxiliary support is carried out during the heat treatment process to ensure that the large-diameter arc-shaped thin-wall forge piece is always in a vertical state; auxiliary hoisting is carried out during hoisting and transferring to ensure that the large-diameter arc-shaped thin-wall forge piece is not damaged during hoisting and transferring; auxiliary support is carried out during daily storage to ensure that the large-diameter arc-shaped thin-wall forge piece is safe and does not fall over during storage; S40. Determine that the heat treatment tray is a frame structure; Since the heat treatment tray accompanies the whole process of the large-diameter arc-shaped thin-wall forge piece, the frame structure is determined according to the principles of small contact area, stable structure, and easy disassembly; S50. Detailed design of each component of the heat treatment tray; The heat treatment tray includes two support plates, two auxiliary support plates, two main support beams, two auxiliary support beams, and eight triangular fixing blocks; The support plate is a trapezoidal plate with a vertical through slot I in the center of the top surface. The through slot I is a limiting slot, and the slot width of the through slot I is 20 mm larger than the thickness of the large-diameter arc-shaped thin-wall forge piece. The bottom surface has a vertical through slot II at each end. The through slot II and the boss near the through slot II form an ear. The two support plates are placed on the left and right sides, respectively, and the inner surface arc of the large-diameter arc-shaped thin-wall forge piece is clamped in the limiting slot. The slot width of the limiting slot is greater than the thickness of the large-diameter arc-shaped thin-wall forge piece, which facilitates the smooth placement of the large-diameter arc-shaped thin-wall forge piece into the limiting slot; The auxiliary support plate is a rectangular plate with a through slot III in the center of the top surface, which has the same size as the through slot I of the support plate. The two auxiliary support plates are attached to the inner side of the support plate to increase the contact area between the support plate and the large-diameter arc-shaped thin-wall forge piece and prevent the large-diameter arc-shaped thin-wall forge piece from being damaged due to the decrease in strength at high temperatures; The main support beam is located at the upper part and is fixedly connected to the inner side of the two support plates symmetrically. It prevents the support plate from tilting inward after being pressed by supporting the frame; The auxiliary support beam is located at the lower part and is fixedly connected to the inner side of the two support plates symmetrically. It prevents the support plate from tilting inward after being pressed by supporting the frame; The triangular fixing block is fixed to the root of each main support beam and auxiliary support beam to increase the stability of the support; S60. Weld each component into a heat treatment tray and perform heat treatment to eliminate stress; S70. Finish machining the heat treatment tray; According to the inner surface arc shape of the large-diameter arc-shaped thin-wall forge piece, the slot opening composed of the limiting slot of the support plate and the through slot III of the auxiliary support plate is polished and finished as a whole until the outer diameter of the arc surface of the slot opening is equal to the inner diameter of the inner surface arc of the large-diameter arc-shaped thin-wall forge piece; The bottom surface of the support plate is polished and finished until the surface roughness of the bottom surface is less than 12.5 mu m; S80. Place the large-diameter arc-shaped thin-wall forge piece on the heat treatment tray for fitting; Cross-stack the shims to the required height, then place the heat treatment tray on the upper layer of the shims through the lifting lug, then tighten the woolen tape at the middle section of the large-diameter arc-shaped thin-wall forge piece, hoist the large-diameter arc-shaped thin-wall forge piece through the woolen tape, and place it on the heat treatment tray symmetrically left and right, and check the suitability of the heat treatment tray; if the fitting standard is reached, the processing is completed, otherwise, return to step S70 and continue to finish until the fitting standard is reached; S90. Complete the daily storage and fixation of the large-diameter arc-shaped thin-wall forge piece; Insert shims between the two end ports of the large-diameter arc-shaped thin-wall forge piece and the ground to strengthen the support until the daily storage and fixation requirements of the large-diameter arc-shaped thin-wall forge piece are met, and complete the daily storage and fixation of the large-diameter arc-shaped thin-wall forge piece.
[0008] Further, the material of the support plate is 12Cr2Mo1V.
[0009] The heat treatment tray obtained by the heat treatment tray field design and processing method for large-diameter arc-shaped thin-wall forge pieces can meet the diversity requirements of auxiliary support during heat treatment, auxiliary hoisting during hoisting and transfer, and auxiliary support during daily storage of the large-diameter arc-shaped thin-wall forge piece, has the advantages of good matching degree, high processing precision and strong flexibility, and is suitable for popularization in the field of support device design and processing of large special-shaped forgings. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 A schematic view of the heat treatment tray obtained by the heat treatment tray field design and processing method for large-diameter arc-shaped thin-wall forge pieces; Figure 2a A schematic view of the support plate in the heat treatment tray obtained by the heat treatment tray field design and processing method for large-diameter arc-shaped thin-wall forge pieces; Figure 2b A schematic view of the support auxiliary plate in the heat treatment tray obtained by the heat treatment tray field design and processing method for large-diameter arc-shaped thin-wall forge pieces; Figure 2c A schematic view of the main support beam in the heat treatment tray obtained by the heat treatment tray field design and processing method for large-diameter arc-shaped thin-wall forge pieces; Figure 2d A schematic view of the auxiliary support beam in the heat treatment tray obtained by the heat treatment tray field design and processing method for large-diameter arc-shaped thin-wall forge pieces; Figure 2eThe schematic view of the triangular fixed block in the heat treatment tray obtained by the on-site design and processing method of the heat treatment tray for large-diameter arc-shaped thin-wall forgings of the present application; Figure 3 The schematic view of the assembly of the heat treatment tray obtained by the on-site design and processing method of the heat treatment tray for large-diameter arc-shaped thin-wall forgings of the present application; Figure 4 The schematic view of the daily fixed installation of the heat treatment tray obtained by the on-site design and processing method of the heat treatment tray for large-diameter arc-shaped thin-wall forgings of the present application.
[0011] In the figure, 1. support plate; 2. support auxiliary plate; 3. main support beam; 4. auxiliary support beam; 5. triangular fixed block; 6. iron pad; 7. large-diameter arc-shaped thin-wall forging; 101. limiting groove; 102. lifting lug. DETAILED DESCRIPTION
[0012] The present application will be described in detail below in combination with the drawings and examples.
[0013] Example: The on-site design and processing method of the heat treatment tray for large-diameter arc-shaped thin-wall forgings of the present embodiment comprises the following steps: S10. analyzing the shape characteristics of the arc-shaped plate-shaped forging; The size of the arc-shaped plate-shaped forging is an outer diameter of φ11000mm, an inner diameter of φ3500mm, and a thickness of 220mm, which is the large-diameter arc-shaped thin-wall forging 7; S20. analyzing the related process flow of the large-diameter arc-shaped thin-wall forging 7; The large-diameter arc-shaped thin-wall forging 7 needs to be heat treated in a vertical state; after the heat treatment is completed, it needs to be hoisted and transferred for water quenching; after the water quenching is completed, it needs to be stored in a vertical state on a daily basis; S30. analyzing the functional requirements of the heat treatment tray; In the heat treatment process, auxiliary support is provided to ensure that the large-diameter arc-shaped thin-wall forging 7 is always in a vertical state; in the hoisting and transferring process, auxiliary hoisting is provided to ensure that the large-diameter arc-shaped thin-wall forging 7 is not damaged during hoisting and transferring; in the daily storage process, auxiliary support is provided to ensure the safety of the large-diameter arc-shaped thin-wall forging 7 during storage and prevent it from falling over; S40. determining that the heat treatment tray is a frame structure; Since the heat treatment tray accompanies the entire process of the machining and storage of the large-diameter arc-shaped thin-wall forging 7, and in view of the principles of small contact area, stable structure, and easy disassembly, the frame structure as shown in Figure 1 is determined to be adopted; S50. detailed design of each component of the heat treatment tray; As shown in Figures 2a-2eThe shown heat treatment tray comprises 2 support plates 1, 2 support auxiliary plates 2, 2 main support beams 3, 2 auxiliary support beams 4 and 8 triangular fixing blocks 5; The support plate 1 is a trapezoidal plate, a vertical through slot I is opened in the center of the top surface, the through slot I is a limiting slot 101, the slot width of the through slot I is 20mm larger than the thickness of the large-diameter arc-shaped thin-wall forge piece 7; vertical through slots II are respectively opened at the front and rear ends of the bottom surface, the through slots II and the bosses near the through slots II form lifting lugs 102; 2 support plates 1 are respectively placed on the left and right sides, and the inner surface arc of the large-diameter arc-shaped thin-wall forge piece 7 is clamped in the limiting slot 101; the slot width of the limiting slot 101 is larger than the thickness of the large-diameter arc-shaped thin-wall forge piece 7, so that the large-diameter arc-shaped thin-wall forge piece 7 can be smoothly placed into the limiting slot 101; The support auxiliary plate 2 is a rectangular plate, a through slot III with the same size as the through slot I of the support plate 1 is opened in the center of the top surface, and 2 support auxiliary plates 2 are respectively attached to the inner side of the support plate 1, used to increase the contact area of the support area of the support plate 1 with the large-diameter arc-shaped thin-wall forge piece 7, prevent the strength of the large-diameter arc-shaped thin-wall forge piece 7 from being reduced at high temperature, and prevent indentation from being generated at the contact position of the support plate 1; The main support beam 3 is located at the upper part, symmetrically fixed and connected to the inner side of the two support plates 1, and supports the frame to prevent the support plate 1 from being inclined inward after being pressed; The auxiliary support beam 4 is located at the lower part, symmetrically fixed and connected to the inner side of the two support plates 1, and supports the frame to prevent the support plate 1 from being inclined inward after being pressed; The triangular fixing block 5 is fixed at the root of each main support beam 3 and auxiliary support beam 4, used to increase the support stability; S60. Weld each component group into a heat treatment tray, and perform heat treatment to eliminate stress; S70. Finish machining the heat treatment tray; According to the inner surface arc shape of the large-diameter arc-shaped thin-wall forge piece 7, the slot opening composed of the limiting slot 101 of the support plate 1 and the through slot III of the support auxiliary plate 2 is polished and finished as a whole, until the outer diameter of the arc surface of the slot opening is equal to the inner diameter of the inner surface arc of the large-diameter arc-shaped thin-wall forge piece 7; The bottom surface of the support plate 1 is polished and finished, until the surface roughness of the bottom surface is less than 12.5μm; S80. Place the large-diameter arc-shaped thin-wall forge piece 7 on the heat treatment tray for fitting; As Figure 3As shown, the shims 6 are cross-stacked to the required height, the heat treatment tray is hoisted and placed on the upper layer of the shims 6 through the lifting lugs 102, then the woolen belt is tightly bound at the middle section of the large-diameter arc-shaped thin-wall forge piece 7, the large-diameter arc-shaped thin-wall forge piece 7 is hoisted through the woolen belt and placed on the heat treatment tray symmetrically, and the suitability of the heat treatment tray is checked; if the suitability reaches the adaptation standard, the machining is completed, otherwise, the step S70 is returned to continue the finish machining until the adaptation standard is reached; S90. The large-diameter arc-shaped thin-wall forge piece 7 is regularly stored and fixed; As shown, the shims 6 are cross-stacked to the required height, the heat treatment tray is hoisted and placed on the upper layer of the shims 6 through the lifting lugs 102, then the woolen belt is tightly bound at the middle section of the large-diameter arc-shaped thin-wall forge piece 7, the large-diameter arc-shaped thin-wall forge piece 7 is hoisted through the woolen belt and placed on the heat treatment tray symmetrically, and the suitability of the heat treatment tray is checked; if the suitability reaches the adaptation standard, the machining is completed, otherwise, the step S70 is returned to continue the finish machining until the adaptation standard is reached; Figure 4 As shown, the shims 6 are cross-stacked to the required height, the heat treatment tray is hoisted and placed on the upper layer of the shims 6 through the lifting lugs 102, then the woolen belt is tightly bound at the middle section of the large-diameter arc-shaped thin-wall forge piece 7, the large-diameter arc-shaped thin-wall forge piece 7 is hoisted through the woolen belt and placed on the heat treatment tray symmetrically, and the suitability of the heat treatment tray is checked; if the suitability reaches the adaptation standard, the machining is completed, otherwise, the step S70 is returned to continue the finish machining until the adaptation standard is reached;
[0014] Further, the material of the support plate 1 is 12Cr2Mo1V. The 12Cr2Mo1V material is uniform, has good welding performance and high-temperature strength characteristics.
[0015] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be fully applied to various fields suitable for the present application. For those skilled in the art, other improvements and refinements can be easily realized without departing from the principles of the present application, and the application is not limited to specific details and the figures shown and described herein.
Claims
1. A method for on-site design and machining of a heat treatment tray for large-diameter arc-shaped thin-walled forgings, characterized in that, The method comprises the following steps: S10. Analyzing the shape characteristics of the arc-shaped plate-shaped forge piece; The arc-shaped plate-shaped forge piece has a size of an outer diameter of φ11000 mm, an inner diameter of φ3500 mm, and a thickness of 220 mm, and is a large-diameter arc-shaped thin-wall forge piece (7); S20. Analyzing the related process flow of the large-diameter arc-shaped thin-wall forge piece (7); The large-diameter arc-shaped thin-wall forge piece (7) needs to be heat treated in a vertical state; after the heat treatment is completed, it needs to be hoisted and transferred for water quenching; after the water quenching is completed, it needs to be stored in a vertical state on a daily basis; S30. Analyzing the functional requirements of the heat treatment tray; During the heat treatment process, auxiliary support is provided to ensure that the large-diameter arc-shaped thin-wall forge piece (7) is always in a vertical state; during the hoisting and transferring process, auxiliary hoisting is provided to ensure that the large-diameter arc-shaped thin-wall forge piece (7) is not damaged during hoisting and transferring; during the daily storage process, auxiliary support is provided to ensure that the large-diameter arc-shaped thin-wall forge piece (7) is stored safely and does not fall over; S40. Determining that the heat treatment tray is a frame structure; Since the heat treatment tray is used throughout the entire process of machining and storage of the large-diameter arc-shaped thin-wall forge piece (7), and in view of the principle of small contact area, stable structure, and easy disassembly, it is determined to adopt a frame structure; S50. Detailed design of each component of the heat treatment tray; The heat treatment tray comprises two support plates (1), two support auxiliary plates (2), two main support beams (3), two auxiliary support beams (4), and eight triangular fixing blocks (5); The support plate (1) is a trapezoidal plate, a vertical through slot I is formed in the center of the top surface, the through slot I is a limiting slot (101), the slot width of the through slot I is 20 mm larger than the thickness of the large-diameter arc-shaped thin-wall forge piece (7); vertical through slots II are respectively formed in the front and rear ends of the bottom surface, the through slots II and the bosses near the through slots II form lifting lugs (102); the two support plates (1) are respectively arranged on the left and right sides, and the inner surface arc of the large-diameter arc-shaped thin-wall forge piece (7) is clamped in the limiting slot (101); the slot width of the limiting slot (101) is greater than the thickness of the large-diameter arc-shaped thin-wall forge piece (7), which facilitates the smooth placement of the large-diameter arc-shaped thin-wall forge piece (7) into the limiting slot (101); The support auxiliary plate (2) is a rectangular plate, a through slot III with the same size as the through slot I of the support plate (1) is formed in the center of the top surface, and the two support auxiliary plates (2) are respectively attached to the inner sides of the support plates (1) to increase the support area of the support plates (1) and the contact area with the large-diameter arc-shaped thin-wall forge piece (7), thereby preventing the large-diameter arc-shaped thin-wall forge piece (7) from being damaged due to the reduction of strength at high temperatures and the formation of indentation at the contact position with the support plate (1); The main support beam (3) is located at the upper part and is fixedly connected to the inner sides of the two support plates (1) in a front-rear symmetrical manner, thereby supporting the frame to prevent the support plates (1) from being inclined inward after being pressed; The auxiliary support beam (4) is located at the lower part and is fixedly connected to the inner sides of the two support plates (1) in a front-rear symmetrical manner, thereby supporting the frame to prevent the support plates (1) from being inclined inward after being pressed; The triangular fixing block (5) is fixed to the root of each main support beam (3) and auxiliary support beam (4) to increase the support stability. S60. Assemble the components into a heat treatment tray and perform heat treatment to eliminate stress; S70. Perform finishing on the heat treatment tray; According to the inner surface arc shape of the large-diameter arc-shaped thin-wall forge piece (7), the limiting groove (101) of the support plate (1) and the through groove III of the support auxiliary plate (2) are polished and finished as a whole until the outer diameter of the notch arc surface is equal to the inner diameter of the inner surface arc of the large-diameter arc-shaped thin-wall forge piece (7); The bottom surface of the support plate (1) is polished and finished until the surface roughness of the bottom surface is less than 12.5μm; S80. Place the large-diameter arc-shaped thin-wall forge piece (7) on the heat treatment tray for adaptation; The gasket iron (6) is cross-stacked to the required height, and then the heat treatment tray is hoisted and placed on the upper layer of the gasket iron (6) through the lifting lug (102), and then the woolen cloth belt is tightly bound at the middle segment of the large-diameter arc-shaped thin-wall forge piece (7), the large-diameter arc-shaped thin-wall forge piece (7) is lifted by the woolen cloth belt, and is placed on the heat treatment tray symmetrically, and the adaptability of the heat treatment tray is checked; if it meets the adaptation standard, the machining is completed, otherwise, return to step S70 and continue to finish until the adaptation standard is met; S90. Complete the daily storage and fixation of the large-diameter arc-shaped thin-wall forge piece (7); Insert the gasket iron (6) between the two end ports of the large-diameter arc-shaped thin-wall forge piece (7) and the ground to strengthen the support until the daily storage and fixation requirements of the large-diameter arc-shaped thin-wall forge piece (7) are met, and the daily storage and fixation of the large-diameter arc-shaped thin-wall forge piece (7) are completed.
2. The method for on-site design and machining of a heat treatment tray for large-diameter arc-shaped thin-walled forgings according to claim 1, characterized in that, The material of the support plate (1) is 12Cr2Mo1V.