A post-welding heat treatment tooling and positioning method for complex large thin-walled components

Abstract

The application discloses a kind of complex big thin-walled component postweld heat treatment tooling and positioning method, the tooling includes support pier and support plate, support plate is set on at least partial support pier, further include support seat and positioning row, support seat is set on the top of support pier or support plate, positioning row is set on the top of support seat, positioning row includes main skeleton plate and vice skeleton plate, main skeleton plate and vice skeleton plate are connected with non-zero angle intersection, multiple avoidance gaps are formed between main skeleton plate and vice skeleton plate, and the accessories of component surface are passed through the avoidance gap.This application can effectively avoid the accessories arranged on the surface of component, avoid the contact between tooling and accessories;At the same time, good overall rigidity and support stability are provided, which can effectively prevent the outer wall of large thin-walled component from collapsing and deforming due to its own weight and the weight of accessories under high temperature heat treatment.

Description

Technical Field

[0001] This application relates to the field of post-weld heat treatment of complex thin-walled components, and in particular to a tooling and positioning method for post-weld heat treatment of complex thin-walled components. Background Technology

[0002] Complex, thin-walled components require overall heat treatment, but the supporting parts for these components are limited. Most of the outer surface of the cylinder is welded with insulating nails in a trident-shaped structure. Other cylinder accessories include large and small connecting pipes arranged irregularly. A dedicated heat treatment fixture needs to be designed for this type of product. The purpose of this fixture is to prevent the outer wall of the thin-walled component from collapsing and deforming due to the weight of the accessories during heat treatment. The cylinder is constructed by welding bent parts and flat plates, requiring effective support at the joints during heat treatment. Traditional support piers in the heat treatment furnace alone cannot meet the heat treatment requirements.

[0003] Existing technology CN109321740B discloses an anti-deformation fixture for heat treatment of thin-walled metal sheets, comprising: a first positioning component, a second positioning component, and an adjusting component. The two first positioning components and two second positioning components are assembled to form a regular quadrilateral. The connecting holes and positioning holes are connected by bolts. When the thin-walled metal sheet is placed between the first and second positioning components, the front of the sheet abuts against the two second positioning components, and the back of the sheet abuts against the adjusting component. This fixture is only suitable for thin-walled sheets and cannot effectively avoid the attachments of complex, large thin-walled components, nor can it effectively solve the collapse problem of large thin-walled components.

[0004] Existing technology CN224015713U discloses a fixture for preventing deformation during heat treatment of thin-walled products. It includes a base plate with a support plate on it. An annular support cylinder and several support plates are fixedly connected to the base plate, with the support plates located inside the annular support cylinder. Several first support mechanisms are mounted on the annular support cylinder, and several second support mechanisms are mounted on the support plates. The first and second support mechanisms are correspondingly arranged. The support plate is used to place the workpiece to be treated, which is located between the first and second support mechanisms. A moving assembly includes a mounting plate with several casters fixedly connected to its bottom surface. The base plate is detachably connected to the mounting plate, and a first fixing ring is fixedly connected to the mounting plate. This fixture cannot effectively avoid the attachments of complex, large, thin-walled components and cannot effectively solve the problem of collapse of these components. Summary of the Invention

[0005] The purpose of this application is to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the first aspect of this application proposes a post-weld heat treatment fixture for complex large thin-walled components, including a support pier and a support plate, the support plate being disposed above at least part of the support pier, and also including a support seat and a positioning row, the support seat being disposed above the support pier or the support plate, the positioning row being disposed above the support seat, the positioning row including a main frame plate and a secondary frame plate, the main frame plate and the secondary frame plate being connected at a non-zero included angle, and multiple clearance gaps being formed between the main frame plate and the secondary frame plate, the clearance gaps being used to allow attachments on the surface of the component to pass through.

[0007] Furthermore, there are two or more main frame plates arranged in parallel, and there are two or more secondary frame plates connected perpendicularly to the main frame plates.

[0008] Furthermore, some of the secondary skeleton plates protrude to one side of the main skeleton plate, while others protrude to the other side of the main skeleton plate. At least some adjacent secondary skeleton plates protrude in opposite directions, thus forming an alternating protrusion structure.

[0009] Furthermore, it also includes a support column, which is disposed within the cavity of the component. The support column includes an upper plate, a support tube, and a lower plate, with the upper plate and lower plate respectively disposed at both ends of the support tube.

[0010] Furthermore, the support plate is provided with clearance holes, which are used to avoid external pipe fittings of the component.

[0011] To achieve the above objectives, the second aspect of this application proposes a method for positioning complex large thin-walled components after welding heat treatment, using the aforementioned tooling for post-weld heat treatment of complex large thin-walled components, comprising: determining the arrangement positions of positioning rows and support columns according to the component; placing support blocks at preset intervals on the platform of the heat treatment furnace, and setting support plates above at least some of the support blocks; setting support seats and positioning rows on the support plates according to the arrangement positions of the positioning rows; placing the component above the positioning rows, and setting support columns inside the cavity of the component according to the arrangement positions of the support columns.

[0012] Furthermore, determining the arrangement of the positioning row and support column based on the component includes: at least some of the support columns are distributed along the extension direction of the weld of the component, and at least some of the support columns and the positioning row are located in the same vertical area in the width direction of the component.

[0013] Furthermore, the spacing between two adjacent support columns in the extension direction of the weld is 0.25 to 0.3 times the length of the weld.

[0014] Furthermore, determining the arrangement of positioning rows and support columns based on the components includes: positioning rows being set perpendicular to the length direction of the components, and two or more positioning rows being arranged parallel to each other along the length direction of the components.

[0015] Furthermore, the spacing between two adjacent positioning rows is ;in, The distance between two adjacent positioning rows, in meters; The elastic modulus of the component at the heat treatment temperature, expressed in N / m. 2 ; Let be the moment of inertia of the component's cross section, in meters. 4 ; This is the equivalent load per unit length of the component, expressed in N / m. The correlation coefficient ranges from 1.47 to 1.96m. -2 .

[0016] Furthermore, the area of ​​contact between the upper surface of all positioning rows and the component is... ;in, The area of ​​the upper surface of all positioning rows in contact with the component, in m². 2 ; The total weight of the component's attachments, expressed in N; This represents the total weight of the component, expressed in N. The allowable contact stress of the component at the heat treatment temperature, in N / m. 2 ; The correlation coefficient ranges from 1.5 to 3.

[0017] Furthermore, the support blocks are placed on the platform of the heat treatment furnace at a preset interval, including: the preset interval between two adjacent support blocks is 0.2 to 0.4 times the length of the support plate.

[0018] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. This tooling, through the setting of positioning rows and clearance gaps, can effectively avoid the numerous attachments arranged on the surface of the component, preventing the tooling from contacting the attachments; at the same time, the cross-frame structure provides good overall rigidity and support stability, and together with the support base and support pier below, it can effectively prevent the outer wall of large thin-walled components from collapsing and deforming due to their own weight and the weight of attachments under the high temperature of heat treatment. 2. The tooling not only improves the overall structural strength and bending stiffness of the positioning row through the grid-like support structure of the positioning row, but also ensures the uniform distribution of the support force, making the components more uniformly stressed during heat treatment, further reducing the risk of deformation caused by local stress concentration, and facilitating modular design and manufacturing. 3. The tooling, through the alternating protruding structure of the sub-frame plate, increases the number and distribution density of discontinuous support points in contact with the components on the upper surface of the positioning row. While meeting the clearance requirements, it maximizes the effective contact area ratio between the tooling and the components, thereby enhancing the stability of the support. 4. The support column of this tooling acts directly on the joint and weld area inside the component, effectively resisting residual stress after welding and gravity collapse under high temperature, and preventing joint shrinkage and deformation; at the same time, the upper and lower plate design of the support column expands the support contact surface, avoids local indentation or stress concentration caused by point contact, and ensures the dimensional stability of the internal structure of large thin-walled components. 5. This invention provides a heat treatment positioning operation method, which realizes the orderly and precise assembly of tooling, ensures the flatness requirements of the upper surface of the positioning row, and guarantees the force transmission path of the internal support column and the external positioning row on the same straight line, thereby achieving internal and external coordinated support during the heat treatment process and effectively controlling the overall shape error of the component.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A structural diagram of a post-weld heat treatment fixture for a complex, thin-walled component according to one embodiment is provided. Figure 2 An overall structural diagram of a complex, thin-walled component post-weld heat treatment fixture according to one embodiment is provided.

[0021] Reference numerals: 1. Support pier; 2. Support plate; 3. Support seat; 4. Positioning row; 41. Main frame plate; 42. Secondary frame plate; 5. Support column; 51. Upper plate; 52. Support pipe; 53. Lower plate. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention.

[0024] Example 1

[0025] According to one aspect of the present invention, a tooling for post-weld heat treatment of complex, large, thin-walled components is provided, such as... Figure 1As shown, the heat treatment fixture includes a support block 1 and a support plate 2. The support plate 2 is disposed above at least part of the support block 1. It also includes a support seat 3 and a positioning row 4. The support seat 3 is disposed above the support block 1 or the support plate 2. The positioning row 4 is disposed above the support seat 3. The positioning row 4 includes a main frame plate 41 and a secondary frame plate 42. The main frame plate 41 and the secondary frame plate 42 are connected at a non-zero included angle. Multiple clearance gaps are formed between the main frame plate 41 and the secondary frame plate 42. The clearance gaps are used to allow attachments on the surface of the component to pass through.

[0026] Specifically, in this embodiment, taking a rectangular complex thin-walled component made of N06617 material as an example, the heat treatment fixture is equipped with two types of support blocks 1 of different lengths. Both support blocks 1 are placed on the platform of the heat treatment furnace. A support plate 2 is positioned above the longer support block 1, and a support seat 3 is positioned above the support plate 2. The support seat 3 is directly positioned above the shorter support block 1. Positioning rows 4 are positioned above the support seats 3, and all positioning rows 4 are parallel to the support seats 3. Support columns 5 are installed inside the cavity of the component. The overall height of the support seat 3 needs to be greater than the maximum outward extension height of the product accessories by 100mm to prevent iron ion contamination caused by contact between the external accessories and the support plate 2 (stainless steel and carbon steel). Furthermore, a 0.2~0.5mm thick stainless steel pad is laid above the positioning rows to isolate them from the component body and prevent iron ion contamination. The post-weld heat treatment fixture provided by this invention has a simple structure, is easy to install, and is highly practical, capable of meeting the heat treatment requirements of complex thin-walled components.

[0027] Furthermore, there are two or more main frame plates 41 arranged in parallel, and there are two or more secondary frame plates 42 arranged in a perpendicular and intersecting manner with the main frame plates 41.

[0028] Furthermore, some of the sub-frame plates 42 protrude to one side of the main frame plate 41, while other sub-frame plates 42 protrude to the other side of the main frame plate 41. At least some of the adjacent sub-frame plates 42 protrude in opposite directions, thus forming an alternating protrusion structure.

[0029] Specifically, in this embodiment, the arrangement of the positioning row needs to avoid gaps between external accessories. The external accessories protrude 100mm in height, and are 100mm in length and width, forming a uniformly arranged assembly with 120mm intervals. These external accessories are weakly rigid components and cannot be used as support points or surfaces. The positioning row 4 needs to be distributed according to a 120mm grid pattern with a depth of 120mm. The secondary frame plate protrudes 120mm on its side. The structure formed by the main frame plate and the secondary frame plate effectively ensures the contact area with the outer surface of the component. The positioning row 4 needs to avoid gaps between accessories and the positioning row according to technical specifications, ensuring that the product accessories do not contact the positioning row under both normal and high-temperature conditions.

[0030] Furthermore, such as Figure 2 As shown, the heat treatment fixture also includes a support column 5, which is disposed in the cavity of the component. The support column 5 includes an upper plate 51, a support tube 52, and a lower plate 53, with the upper plate 51 and the lower plate 53 respectively disposed at both ends of the support tube 52.

[0031] Specifically, in this embodiment, the support tube 52 is required to have a diameter of not less than 200mm and a wall thickness of 10mm according to calculations. The upper plate and lower plate are internal accessories of the avoidance component cavity, with a specification range of 300mm×300mm, so as to ensure the effective support area.

[0032] Furthermore, the support plate 2 is provided with clearance holes, which are used to avoid external pipe fittings of the component.

[0033] Specifically, in this embodiment, the support plate 2 consists of two plates, one of which has clearance holes to avoid a portion of the protruding large pipe fitting in the accessory. The support plate 2 is a carbon steel plate with a thickness of 50-70mm. The support plate 2 provides sufficient flatness and support for the positioning row 4 in high-temperature environments.

[0034] Example 2

[0035] According to one aspect of the present invention, a method for positioning complex large thin-walled components after welding heat treatment is proposed, using a heat treatment fixture for complex large thin-walled components as described above, comprising the following steps: determining the arrangement positions of positioning rows 4 and support columns 5 according to the component; placing support blocks 1 at preset intervals on the platform of the heat treatment furnace, and setting support plates 2 above at least some of the support blocks 1; setting support seats 3 and positioning rows 4 on the support plates 2 according to the arrangement positions of positioning rows 4; placing the component above the positioning rows 4, and setting support columns 5 inside the cavity of the component according to the arrangement positions of the support columns 5.

[0036] Furthermore, at least some of the support columns 5 are distributed along the extension direction of the weld of the component, and at least some of the support columns 5 and the positioning row 4 are located in the same vertical area in the width direction of the component.

[0037] It should be noted that the same vertical area means that the projections of the two components on the horizontal plane at least partially overlap.

[0038] By distributing some support columns along the weld extension direction and ensuring that some support columns are located in the same vertical area of ​​the positioning row, the vertical and effective transmission of support force is achieved. This layout directly strengthens the support of the weld joint, a vulnerable area prone to deformation. In particular, in the width direction of the component, the internal support columns and the external positioning row form a straight force transmission, which greatly enhances the weld area's resistance to thermal deformation and prevents deformation caused by asymmetrical heating or cooling of the weld.

[0039] like Figure 2 As shown, taking a rectangular, complex, thin-walled component made of material N06617 as an example, this component is assembled and welded from flat plates and bent parts. There are welds at the weld joints. The component box is 4m wide and 6m long, with a total of 19 welds distributed vertically. During the final heat treatment, the component contains numerous external attachments. The weight of these attachments on the cylinder cannot be ignored during heat treatment. To ensure effective control of the component's internal dimensions, to prevent weld collapse and deformation at the joints, and to address issues such as the tooling not being able to provide support to the attachments, and the attachments occupying a large area on the component's exterior, resulting in insufficient effective support area between the tooling and the component's outer surface, simulation calculations are needed to determine the position of the support columns 5 inside the component based on the weld locations. The support columns 5 are located in the same vertical region as the welds.

[0040] Furthermore, the distance between two adjacent support columns 5 in the extension direction of the weld is 0.25 to 0.3 times the length of the weld.

[0041] Specifically, in this embodiment, due to the long weld length, heavy external accessories, thin-walled structure of the component cylinder, and the need to control the flatness of the component, the number of supports cannot be too small. The straight-edge weld length in the component's length direction is 3m, requiring at least 4 support columns 5. The oblique-edge weld length in the component's length direction is 3.5m, requiring at least 3 support columns 5 due to the large number of internal accessories. In the component's width direction, which is closer to the internal accessories, more support columns 5 are needed; at least 5 support columns 5 are required in this direction. Furthermore, support columns 5 are also provided in the middle of the component's cavity to prevent the upper part of the component from collapsing during high-temperature heat treatment. The placement of the support columns must avoid the internal accessories of the component.

[0042] Furthermore, the positioning row 4 is set perpendicular to the length direction of the component, and two or more positioning rows 4 are arranged parallel to each other along the length direction of the component.

[0043] Specifically, in this embodiment, it is necessary to control the gap between the positioning row and the attachments based on simulation data such as the arrangement of the component attachments and the thermal expansion displacement during the heat treatment process. On this basis, it is necessary to ensure the contact support area between the upper surface of the positioning row 4 and the cylinder, and strictly control the position and size of the positioning row 4 and the attachments.

[0044] Furthermore, the spacing between two adjacent positioning rows 4 is ;in, The distance between two adjacent positioning rows, in meters; The elastic modulus of the component at the heat treatment temperature, expressed in N / m. 2 ; Let be the moment of inertia of the component's cross section, in meters. 4 ; This is the equivalent load per unit length of the component, expressed in N / m. The correlation coefficient ranges from 1.47 to 1.96m. -2 .

[0045] The moment of inertia I is taken as the weighted average value of the component along its length. When the component is composed of multiple different cross-sectional segments, the moment of inertia of each segment is weighted by the length of each segment, and the resulting value is the equivalent cross-sectional moment of inertia of the component. When the cross-section of the component changes continuously along its length, the average value is the integral average value of the cross-sectional moment of inertia along the length.

[0046] The equivalent load per unit length, q, is the ratio of the total load in the vertical direction to the total length of the component. The total load includes at least the component's own gravity load and the gravity load of the accessories fixed to the component. All loads are calculated as the product of the actual mass and gravitational acceleration under heat treatment conditions.

[0047] In the above formula, to ensure the uniformity of dimensions on both sides of the formula, the correlation coefficient is... The unit is m -2 E, I, and q are determined by the material properties, geometric dimensions, and mass distribution of the component itself; correlation coefficient This is an empirical coefficient set according to the component material and heat treatment process conditions. It is used to characterize the influence of temperature field non-uniformity and high-temperature creep effect of materials on the support spacing.

[0048] The above formula ensures that the span between adjacent positioning rows is within the maximum allowable deflection range of the component, which theoretically guarantees the flatness and dimensional stability of the component under high-temperature heat treatment conditions, and improves the reliability and repeatability of process design.

[0049] Specifically, in this embodiment, calculations based on the above formula show that setting up positioning rows at 1m intervals along the length of the component is more suitable. Simultaneously, the arrangement of the positioning rows needs to avoid external attachments to the component.

[0050] Furthermore, the area of ​​contact between the upper surface of all positioning rows 4 and the component is... ;in, The area of ​​the upper surface of all positioning rows in contact with the component, in m². 2 ; The total weight of the component's attachments, expressed in N; This represents the total weight of the component, expressed in N. The allowable contact stress of the component at the heat treatment temperature, in N / m. 2 ; The correlation coefficient ranges from 1.5 to 3.

[0051] The total weight of all attachments installed on the main body of the component; This refers to the total weight of the component itself; all of the above weights are equal to the product of the actual mass of each component or part and the acceleration due to gravity. It is the allowable contact stress of the component material at the set heat treatment temperature. It is determined based on the yield strength of the component material and the preset safety factor (with a value of 1.5~3) to limit the local compressive stress at the contact point and prevent plastic deformation or crushing. It is used to characterize the non-uniformity of the actual stress distribution on the contact surface and the influence of the contact gap.

[0052] The above formula can prevent the high-temperature contact stress from exceeding the material's allowable value due to insufficient contact area, thereby avoiding indentations, plastic deformation, or material damage on the component surface at high temperatures. At the same time, sufficient contact area also improves the stability of the support, reduces the small displacement of the component during thermal cycling, and ensures the uniformity of heat treatment quality.

[0053] Specifically, in this embodiment, calculated using the above formula, the total effective support area of ​​all positioning rows should be no less than 1.2m². 2 ,like Figure 1 As shown, to ensure the tooling effectively supports the shape of the component, five different lengths of positioning rows are used according to the component's width: three sets of 4m length, one set of 3.5m length, one set of 2.5m length, one set of 1.5m length, and one set of 1m length. The contact area between the upper surface of the longest positioning row and the component must be at least 0.24m². 2 The upper surfaces of all positioning rows should be kept on the same plane as much as possible, with a flatness requirement of 1 mm per square meter.

[0054] Furthermore, the preset spacing between two adjacent support piers 1 is 0.2 to 0.4 times the length of the support plate.

[0055] Specifically, in this embodiment, the spacing between the support piers is 1.5~2m.

[0056] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. This tooling, through the setting of positioning rows and clearance gaps, can effectively avoid the numerous attachments arranged on the surface of the component, preventing the tooling from contacting the attachments; at the same time, the cross-frame structure provides good overall rigidity and support stability, and together with the support base and support pier below, it can effectively prevent the outer wall of large thin-walled components from collapsing and deforming due to their own weight and the weight of attachments under the high temperature of heat treatment. 2. The tooling not only improves the overall structural strength and bending stiffness of the positioning row through the grid-like support structure of the positioning row, but also ensures the uniform distribution of the support force, making the components more uniformly stressed during heat treatment, further reducing the risk of deformation caused by local stress concentration, and facilitating modular design and manufacturing. 3. The tooling, through the alternating protruding structure of the sub-frame plate, increases the number and distribution density of discontinuous support points in contact with the components on the upper surface of the positioning row. While meeting the clearance requirements, it maximizes the effective contact area ratio between the tooling and the components, thereby enhancing the stability of the support. 4. The support column of this tooling acts directly on the joint and weld area inside the component, effectively resisting residual stress after welding and gravity collapse under high temperature, and preventing joint shrinkage and deformation; at the same time, the upper and lower plate design of the support column expands the support contact surface, avoids local indentation or stress concentration caused by point contact, and ensures the dimensional stability of the internal structure of large thin-walled components. 5. This invention provides a heat treatment positioning operation method, which realizes the orderly and precise assembly of tooling, ensures the flatness requirements of the upper surface of the positioning row, and guarantees the force transmission path of the internal support column and the external positioning row on the same straight line, thereby achieving internal and external coordinated support during the heat treatment process and effectively controlling the overall shape error of the component.

[0057] The above are merely several specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0059] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A post-weld heat treatment fixture for complex large thin-walled components, comprising a support pier (1) and a support plate (2), wherein the support plate (2) is disposed above at least a portion of the support pier (1). Its features are, It also includes a support base (3) and a positioning row (4). The support base (3) is disposed above the support pier (1) or the support plate (2). The positioning row (4) is disposed above the support base (3). The positioning row (4) includes a main frame plate (41) and a secondary frame plate (42). The main frame plate (41) and the secondary frame plate (42) are connected at a non-zero angle. Multiple clearance gaps are formed between the main frame plate (41) and the secondary frame plate (42). The clearance gaps are used to allow attachments on the surface of the component to pass through.

2. The heat treatment fixture according to claim 1, characterized in that, There are two or more main skeleton plates (41), which are arranged in parallel. There are two or more secondary skeleton plates (42), which are perpendicularly connected to the main skeleton plates (41).

3. The heat treatment fixture according to claim 2, characterized in that, Some of the sub-frame plates (42) protrude to one side of the main frame plate (41), and another part of the sub-frame plates (42) protrude to the other side of the main frame plate (41). At least some of the adjacent sub-frame plates (42) protrude in opposite directions, thus forming an alternating protrusion structure.

4. The heat treatment fixture according to claim 1, characterized in that, It also includes a support column (5), which is disposed in the cavity of the component. The support column (5) includes an upper plate (51), a support tube (52) and a lower plate (53), with the upper plate (51) and the lower plate (53) respectively disposed at both ends of the support tube (52).

5. The heat treatment fixture according to claim 1, characterized in that, The support plate (2) is provided with a clearance hole, which is used to avoid the pipe fittings outside the component.

6. A method for positioning complex large thin-walled components after welding heat treatment, using a tooling for post-weld heat treatment of complex large thin-walled components as described in any one of claims 1 to 5, characterized in that, include: The arrangement positions of the positioning row (4) and the support column (5) are determined according to the components; Support blocks (1) are placed on the table of the heat treatment furnace at a preset interval, and support plates (2) are provided above at least part of the support blocks (1). According to the arrangement position of the positioning row (4), a support seat (3) and the positioning row (4) are set on the support plate (2). The component is placed above the positioning row (4), and the support column (5) is set inside the cavity of the component according to the arrangement position of the support column (5).

7. The heat treatment positioning method according to claim 6, characterized in that, The process of determining the arrangement positions of the positioning row (4) and the support column (5) based on the components includes: At least some of the support columns (5) are distributed along the extension direction of the weld of the component, and at least some of the support columns (5) and the positioning row (4) are located in the same vertical area in the width direction of the component.

8. The heat treatment positioning method according to claim 7, characterized in that, The distance between two adjacent support columns (5) in the extension direction of the weld is 0.25 to 0.3 times the length of the weld.

9. The heat treatment positioning method according to claim 6, characterized in that, The process of determining the arrangement positions of the positioning row (4) and the support column (5) based on the components includes: The positioning row (4) is set perpendicular to the length direction of the component, and two or more positioning rows (4) are arranged parallel to the length direction of the component.

10. The heat treatment positioning method according to claim 9, characterized in that, The distance between two adjacent positioning rows (4) is ; in, The distance between two adjacent positioning rows, in meters; The elastic modulus of the component at the heat treatment temperature, expressed in N / m. 2 ; Let be the moment of inertia of the component's cross section, in meters. 4 ; This is the equivalent load per unit length of the component, expressed in N / m. The correlation coefficient ranges from 1.47 to 1.96m. -2 .

11. The heat treatment positioning method according to claim 9, characterized in that, The area of ​​the upper surface of all positioning rows (4) in contact with the component is ; in, The area of ​​the upper surface of all positioning rows in contact with the component, in m². 2 ; The total weight of the component's attachments, expressed in N; This represents the total weight of the component, expressed in N. The allowable contact stress of the component at the heat treatment temperature, in N / m. 2 ; The correlation coefficient ranges from 1.5 to 3.

12. The heat treatment positioning method according to claim 6, characterized in that, The placement of support blocks (1) at preset intervals on the platform of the heat treatment furnace includes: The preset spacing between two adjacent support piers (1) is 0.2 to 0.4 times the length of the support plate.

Images