Welding method for embedded parts of ssat tooling for fusion device

Abstract

The present application relates to the technical field of nuclear fusion device, and discloses a welding method for embedded parts of SSAT tooling of a fusion device, comprising the following steps: processing a groove and a bevel on the welding surface of the embedded part of a to-be-welded piece, and the bevel is symmetrically arranged on the opposite sides of the groove in the thickness direction of the embedded part; hoisting the embedded part of the to-be-welded piece to a support platform; butting the embedded parts of two to-be-welded pieces, oppositely arranging the grooves on the two embedded parts to form a cavity, and oppositely arranging the bevels on the two embedded parts to form a welding groove; point welding and fixing the two embedded parts in the welding groove; arranging an arc striking plate on the opposite ends of the weld of the two embedded parts, and the material of the arc striking plate is the same as that of the embedded part; and simultaneously performing multi-layer welding and fixing in the two welding grooves located on the opposite sides of the cavity. The welding method of the embodiment can save the steps of repeatedly turning over, adjusting and heat treating after preheating of the embedded part during welding.

Description

Technical Field

[0001] This invention relates to the field of nuclear fusion device technology, and in particular to a welding method for embedded parts used in SSAT tooling of fusion devices. Background Technology

[0002] The SSAT (Sector Sub-Assembly Tool) system of the fusion device is a temporary device used by the vacuum chamber body, the vacuum chamber cold shield, and the TF (Toroidal Field) magnet assembly.

[0003] During operation, the fusion device SSAT fixture needs to move along the bottom circular track. The track not only needs to bear the weight of the entire vacuum chamber component and the fusion device SSAT fixture itself, but also needs to withstand the lateral forces caused by sliding. At the same time, due to the large diameter of the fusion device SSAT fixture, it can only be manufactured in sections. In order to ensure the stability of the base of the fusion device SSAT fixture during operation, 70mm thick Q355 low alloy steel plates are usually selected and welded into the whole embedded part to form the fusion device SSAT fixture embedded part. In addition, in order to ensure the installation accuracy of the fixture equipment on the base, the overall flatness of the embedded part needs to be within 1mm, and the entire embedded part needs to not fail during the subsequent vacuum chamber pre-assembly process. Therefore, the requirements for the material and manufacturing process of the embedded part are extremely high.

[0004] However, in the existing technology, the embedded parts need to be repeatedly turned over, adjusted, and preheated before heat treatment during welding, resulting in poor welding quality of the embedded parts. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a welding method for embedded parts of SSAT tooling for fusion devices. The welding method for embedded parts of SSAT tooling for fusion devices eliminates the need for repeated flipping, adjustment, and preheating heat treatment during welding, thereby improving the welding quality of embedded parts and solving the technical problem of poor welding quality of embedded parts in the prior art.

[0006] A welding method for embedded parts of a fusion device SSAT tooling according to an embodiment of the present invention includes the following steps: machining grooves and bevels on the welding surface of the embedded parts of the parts to be welded, wherein the bevels are symmetrically arranged on opposite sides of the grooves in the thickness direction of the embedded parts; hoisting the embedded parts of the parts to be welded onto a support platform; butt-jointing the embedded parts of two parts to be welded, wherein the grooves on the two embedded parts are arranged opposite each other to form a cavity, and the bevels on the two embedded parts are arranged opposite each other to form a welding groove; spot welding the two embedded parts in the welding groove; setting an arc-starting plate at each opposite end of the weld of the two embedded parts, wherein the material of the arc-starting plate is the same as that of the embedded parts; and simultaneously performing multi-layer welding fixation in the two welding grooves located on opposite sides of the cavity.

[0007] According to an embodiment of the present invention, a welding method for embedded parts of a fusion device SSAT tooling is provided. This method involves machining grooves and bevels on the welding surfaces of the embedded parts to be welded, and arranging the grooves on two embedded parts opposite each other to form a cavity. The bevels on the two embedded parts are also arranged opposite each other to form a welding groove. The cavity reduces the amount of weld seam and the thickness of the cladding metal on one side, eliminating the need for preheating and post-weld heat treatment of the embedded parts. This significantly improves the welding efficiency and quality of the embedded parts. The welding groove further reduces the welding difficulty of the two embedded parts. Simultaneously, by performing multi-layer welding and fixing in two welding grooves located on opposite sides of the cavity, the embedded parts can be prevented from being flipped and adjusted. This also facilitates timely adjustment of the welding sequence of the multi-layer welding of the two embedded parts, enabling control over the welding deformation of the two embedded parts and improving their welding quality.

[0008] In some embodiments, the groove depth is in the range of 5mm to 10mm; and / or, in the thickness direction of the embedded part, the groove height is in the range of 20mm to 30mm.

[0009] In some embodiments, the sidewall of the groove and the bottom wall of the groove are connected by a first arc segment, the radius of which is in the range of 5mm to 10mm.

[0010] In some embodiments, in the thickness direction of the embedded part, the bevel has a first part and a second part with different inclination angles, the first part being connected between the second part and the groove; wherein the included angle between the first part and the sidewall of the groove is in the range of 40°~45°; and / or, the included angle between the second part and the sidewall of the groove is in the range of 60°~65°.

[0011] In some embodiments, the first part and the second part are connected by a second arc segment, the radius of which ranges from 5mm to 10mm.

[0012] In some embodiments, the height of the first portion in the thickness direction of the embedded part ranges from 8mm to 10mm.

[0013] In some embodiments, when the embedded parts of two parts to be welded are connected, the two embedded parts are controlled to be spaced apart and the minimum distance between the two embedded parts is 1mm to 4mm.

[0014] In some embodiments, the bottom of the support platform is hollow, and the height of the support platform is not less than 70cm.

[0015] In some embodiments, before spot welding the two embedded parts, the method further includes the following step: cleaning the bevel oil or oxide layer with a wire brush or polishing pad.

[0016] In some embodiments, performing multi-layer welding fixation simultaneously in two welding grooves located on opposite sides of the cavity includes the following steps: performing root pass welding using manual argon arc welding and φ2.0mm welding wire; performing fill pass welding using manual argon arc welding on the basis of the root pass welding; performing fill pass welding using manual electric arc welding and φ4.0mm welding rod, with the interpass temperature not exceeding 250°C; and when welding to the cover pass, performing fill pass welding using manual electric arc welding and switching to φ3.2mm welding rod.

[0017] In some embodiments, after multi-layer welding and fixing are performed simultaneously in two welding grooves located on opposite sides of the cavity, the method further includes the step of grinding the pre-embedded part after welding.

[0018] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a flowchart illustrating a welding method for embedded parts in SSAT tooling for a fusion device, according to some embodiments of the present invention.

[0021] Figure 2 This is a schematic diagram of the embedded parts and support platform according to some embodiments of the present invention;

[0022] Figure 3 This is a cross-sectional view of the embedded parts before welding in some embodiments of the present invention;

[0023] Figure 4 for Figure 3 A magnified view of region I in the middle;

[0024] Figure 5 This is a cross-sectional view of the welding process of embedded parts in some embodiments of the present invention;

[0025] Figure 6 This is a flowchart illustrating a welding method for embedded parts in SSAT tooling for fusion devices, according to other embodiments of the present invention.

[0026] Figure label:

[0027] 100. Embedded parts;

[0028] 110. Groove;

[0029] 120. Beveling; 121. Part One; 122. Part Two;

[0030] 130. Weld;

[0031] 140. First arc segment;

[0032] 150. The second arc segment;

[0033] 160. Lifting hole;

[0034] 200. Supporting platform;

[0035] 300. Cavity;

[0036] 400, Welding groove;

[0037] 500, Arc-starting plate;

[0038] 600, Welding layer;

[0039] 700. Cover. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] It should be noted that in the existing technology, the embedded parts are usually welded with a V-shaped groove on one side and a submerged arc single-sided welding method. Although the submerged arc single-sided welding is preheated before welding to achieve a large heat input and ensure that the workpiece temperature is not lower than the preheating temperature during the welding process, and the welding efficiency is high, it has the defect that it is difficult to guarantee the control of welding deformation. In addition, the internal restraint stress of single-sided welding is large, which makes it easier to produce welding defects.

[0043] Meanwhile, some technologies employ double-sided welding for embedded parts, which also have bevels. Double-sided welding has various combinations, such as symmetrical and asymmetrical X-type, symmetrical and asymmetrical Y-type, and symmetrical and asymmetrical U-type bevels. The bevel welding methods include both full penetration and non-full penetration, which are further divided into manual shielded metal arc welding (SMAW) or submerged arc welding (SAW). Although double-sided welding can control welding deformation, both manual welding and SAW require repeated workpiece flipping, tooling adjustments, and heat treatment after preheating, resulting in poor welding efficiency for embedded parts. The high-temperature environment also affects the welder's welding quality. There are also risks associated with the hoisting and installation of embedded parts. In addition, non-full penetration double-sided welding also carries the risk of defects such as internal incomplete fusion, slag inclusions, and stress concentration.

[0044] In other words, for the above welding methods, when the weld thickness exceeds 50mm, it is generally necessary to use preheating before welding, hydrogen removal after welding, and post-weld heat treatment to remove residual stress in the weld. This is difficult to operate and greatly increases the manufacturing time of the embedded parts.

[0045] To solve the above problems, combined with Figures 1-6 As shown, this application proposes a welding method for an embedded part 100 used in the SSAT tooling of a fusion device.

[0046] The following describes a welding method for an embedded part 100 for a fusion device SSAT tooling according to an embodiment of the present invention with reference to the accompanying drawings.

[0047] like Figure 1 As shown, a welding method for an embedded part 100 of a fusion device SSAT tooling according to an embodiment of the present invention includes the following steps:

[0048] S1. A groove 110 and a bevel 120 are machined on the welding surface of the embedded part 100 to be welded. In the thickness direction of the embedded part 100, the bevel 120 is symmetrically arranged on opposite sides of the groove 110 (see the structural schematic diagram of the groove 110 and the bevel 120). Figure 3 ).

[0049] In the above steps, by processing grooves 110 and bevels 120 on the welding surface of the embedded part 100 to be welded, the thickness of the cladding metal of the embedded part 100 can be reduced, thereby reducing the amount of weld and reducing the welding time to a certain extent. At the same time, grooves 110 and bevels 120 can reduce the welding difficulty of the embedded part 100.

[0050] It should be noted that the thickness direction mentioned above can be understood as... Figure 3 The Z direction is shown in the diagram.

[0051] It should also be noted that the groove 110 and bevel 120 can be machined by machine tools, which can reduce the manufacturing difficulty of the groove 110 and bevel 120 and ensure the forming quality of the groove 110 and bevel 120.

[0052] In a specific example, the embedded part 100 is made of low alloy steel to give it a certain structural strength.

[0053] S2. Hoist the embedded part 100 of the part to be welded onto the support platform 200.

[0054] In the above steps, the support platform 200 can be used to support the embedded part 100 so that the welder can perform welding work on the embedded part 100 in the future.

[0055] In some embodiments, such as Figure 2 As shown, the embedded part 100 is provided with a lifting hole 160. By using a workshop crane in conjunction with the lifting hole 160, the embedded part 100 can be lifted and placed on the support platform 200. The lifting hole 160 can reduce the difficulty of lifting the embedded part 100 onto the support platform 200 and ensure the positional stability of the embedded part 100 during the lifting process.

[0056] In specific examples, such as Figure 2 As shown, the embedded part 100 is provided with three lifting holes 160, which are arranged in a triangle to improve the positional stability of the embedded part 100 during the lifting process to the support platform 200.

[0057] S3. Connect the two embedded parts 100 to be welded together. The grooves 110 on the two embedded parts 100 are arranged opposite each other to form a cavity 300, and the bevels 120 on the two embedded parts 100 are arranged opposite each other to form a welding groove 400 (see the structural diagram of the cavity 300 and the welding groove 400). Figure 3 and Figure 4 ).

[0058] In the above steps, by setting the grooves 110 on the two embedded parts 100 opposite each other to form a cavity 300, since the embedded parts 100 mainly bear compressive stress and the tensile stress between the embedded parts 100 is small, setting the cavity 300 will not affect the welding quality. The cavity 300 can reduce the amount of weld and the thickness of the cladding metal on one side of the embedded parts 100, and meet the overall connection of the embedded parts 100, which facilitates the full penetration of the welding groove 400. This eliminates the need for preheating before welding and heat treatment after welding of the embedded parts 100, greatly improves the welding efficiency of the embedded parts 100, and reduces the welding difficulty of the embedded parts 100.

[0059] S4. Spot weld the two embedded parts 100 in the welding groove 400.

[0060] The above steps are used to achieve the initial welding and fixing of the two embedded parts 100, reduce the welding difficulty of the two embedded parts 100 in the future, and at the same time, it is also conducive to the sealing of the cavity 300 and to achieving the overall connectivity of the embedded parts 100.

[0061] S5. An arc-starting plate 500 is set at each of the opposite ends of the weld 130 of the two embedded parts 100. The material of the arc-starting plate 500 is the same as that of the embedded part 100.

[0062] In the above steps, the arc-starting plate 500 serves as a transition carrier. During the welding process, the arc can be ignited and stably burned on the arc-starting plate 500 first. After the welding parameters are stable, the arc can be transferred to the formal weld 130 of the embedded part 100, thereby eliminating welding defects in the initial section and ensuring the welding quality and dimensional accuracy of the formal section of the weld 130 of the embedded part 100.

[0063] It should be noted that the material of the arc-starting plate 500 is the same as that of the embedded part 100, which means that the arc-starting plate 500 is also made of low alloy steel. This is to ensure the consistency of the quality of the welded joint and avoid introducing additional welding defects due to material differences, thereby ensuring the welding quality of the embedded part 100.

[0064] In some embodiments, such as Figure 2As shown, weld 130 is formed between two parts to be welded and extends along a first direction, with two arc-starting plates 500 respectively disposed at opposite ends of weld 130 in the first direction. This is to facilitate the use of arc-starting plates 500 to eliminate welding defects in the initial section of the welding groove 400 of the embedded part 100, thereby improving the welding quality of the embedded part 100.

[0065] It should be noted that the first direction mentioned above can be understood as... Figure 2 The X direction is shown in the diagram.

[0066] S6. Simultaneously, multi-layer welding and fixing are performed in two welding grooves 400 located on opposite sides of the cavity 300.

[0067] In the above steps, the welding deformation of the embedded part 100 can be effectively controlled, the full penetration of the embedded part 100 on both sides can be achieved, and the welding difficulty of the two welding grooves 400 located on opposite sides of the cavity 300 can be reduced.

[0068] It should be noted that by using the above welding method, the two embedded parts 100 can be welded symmetrically on both sides. This reduces the amount of welding and avoids flipping the embedded parts 100, thereby controlling the welding deformation of the embedded parts 100, improving the welding quality of the embedded parts 100, and reducing potential hazards (such as tilting of the welding position) that may occur during the flipping process of the embedded parts 100.

[0069] In a specific example, during the welding process, two welders weld two welding grooves 400 respectively, so as to achieve multi-layer welding and fixation in the two welding grooves 400 located on opposite sides of the cavity 300 at the same time, avoiding the flipping of the embedded part 100.

[0070] As can be seen from the above structure, the welding method of the embedded part 100 for the SSAT tooling of the fusion device in this embodiment of the invention involves machining grooves 110 and bevels 120 on the welding surface of the embedded part 100 to be welded, with the grooves 110 on the two embedded parts 100 arranged opposite each other to form a cavity 300, and the bevels 120 on the two embedded parts 100 arranged opposite each other to form a welding groove 400. The cavity 300 can reduce the amount of weld seam of the two embedded parts 100 and the thickness of the cladding metal on one side, thereby eliminating the need for preheating before welding and heat treatment after welding of the embedded parts 100, greatly improving the welding efficiency of the embedded parts 100, and improving the welding quality of the two embedded parts 100. The welding groove 400 can also further reduce the welding difficulty of the two embedded parts 100.

[0071] Meanwhile, by performing multi-layer welding and fixing in the two welding grooves 400 located on opposite sides of the cavity 300, the pre-embedded parts 100 can be prevented from flipping, making it easier to adjust the welding sequence of the two pre-embedded parts 100 in a timely manner, thereby controlling the welding deformation of the two pre-embedded parts 100 and improving the welding quality of the two pre-embedded parts 100.

[0072] It is understandable that, compared with the prior art, this application can not only eliminate the preheating, flipping and post-weld heat treatment steps of the embedded part 100, greatly improve the welding efficiency of the embedded part 100 and improve the welding quality of the two embedded parts 100, but also reduce the welding difficulty of the embedded part 100 and reduce the welding time of the embedded part 100.

[0073] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0074] In some embodiments, combined with Figure 3 and Figure 5 As shown, the groove depth of groove 110 ranges from 5mm to 10mm. Here, the groove depth of groove 110 can be understood as... Figure 5 As shown in the figure, by setting the groove depth L1 of the groove 110 to 5mm~10mm, the cavity 300 can be guaranteed to have a certain volume. This not only avoids the groove depth L1 of the groove 110 being too large and affecting the structural strength of the embedded part 100, but also avoids the groove depth L1 of the groove 110 being too small and causing the cavity 300 to have a small volume. This avoids the cavity 300 being unable to effectively reduce the amount of weld seams of the two embedded parts 100 and the thickness of the cladding metal on one side, thus affecting the welding quality of the embedded part 100.

[0075] Specifically, the groove depth L1 of the groove 110 is 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, etc.

[0076] In some embodiments, combined with Figure 3 and Figure 5 As shown, in the thickness direction of the embedded part 100, the height of the groove 110 ranges from 20mm to 30mm. The height of the groove 110 here can be understood as... Figure 5 As shown in the figure, by setting the height H1 of the groove 110 to 20mm~30mm, the cavity 300 has a certain volume. On the one hand, this avoids the groove 110 height H1 being too large and encroaching on too much space of the welding groove 400, thereby avoiding affecting the welding effect of the embedded part 100 and preventing a reduction in the structural strength of the embedded part 100. On the other hand, it also avoids the groove 110 height H1 being too small, resulting in a small volume of the cavity 300, thereby ensuring the volume of the cavity 300 and helping to reduce the amount of weld seams of the two embedded parts 100 and the thickness of the cladding metal on one side.

[0077] Specifically, the height H1 of the groove 110 is 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm or 30mm, etc.

[0078] It is worth noting that the cavity 300 can not only satisfy the overall connectivity of the embedded part 100, but also be extended to the welding of thick-walled embedded parts 100. The cavity 300 can be used as an argon-filling chamber on the welding back side of the embedded part 100. At the same time, the structure and size of the cavity 300 can be adjusted according to the thickness of different embedded parts 100, so that the cavity 300 has a wide range of applications.

[0079] In some embodiments, such as Figure 3 As shown, the sidewall and bottom wall of the groove 110 are connected by a first arc segment 140, the radius of which ranges from 5mm to 10mm. It should be noted that the radius of the first arc segment 140 can be understood as... Figure 3 As shown in the figure, R1 is provided between the side wall and the bottom wall of the groove 110 by setting a first arc segment 140, and setting the radius R1 of the first arc segment 140 to 5mm~10mm. This can avoid stress concentration between the side wall and the bottom wall of the groove 110. When multi-layer welding is performed simultaneously in the two welding grooves 400 located on opposite sides of the cavity 300, the first arc segment 140 can distribute the load to the rest of the embedded part 100, effectively release stress, and improve the welding quality of the embedded part 100.

[0080] Specifically, the radius R1 of the first arc segment 140 is 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, etc.

[0081] In some embodiments, such as Figure 3 As shown, in the thickness direction of the embedded part 100, the bevel 120 has a first part 121 and a second part 122 with different inclination angles. The first part 121 is connected between the second part 122 and the groove 110. By setting the first part 121 and the second part 122 with different inclination angles, the welding difficulty of the embedded part 100 is reduced, and the difficulty of the welding rod entering the welding groove 400 is reduced, which facilitates the entry of the welding rod into the welding groove 400 in subsequent welding work and reduces the welding time to a certain extent.

[0082] In the description of this invention, features defined as "first" and "second" may explicitly or implicitly include one or more of the features, used to distinguish and describe features, without any order or importance.

[0083] In some embodiments, such as Figure 3 As shown, the included angle between the first part 121 and the sidewall of the groove 110 ranges from 40° to 45°. It should be noted that the included angle between the first part 121 and the sidewall of the groove 110 can be understood as... Figure 3As shown in the figure, by setting the included angle α between the first part 121 and the side wall of the groove 110 to 40°~45°, the bevel 120 can have an inclined angle in the first part 121, thereby reducing the amount of welding of the embedded part 100 and improving the welding efficiency of the embedded part 100.

[0084] Specifically, the included angle α between the first part 121 and the sidewall of the groove 110 is 40°, 41°, 42°, 43°, 44° or 45°, etc.

[0085] In some embodiments, such as Figure 3 As shown, the included angle between the second part 122 and the sidewall of the groove 110 ranges from 60° to 65°. It should be noted that the included angle between the second part 122 and the sidewall of the groove 110 can be understood as... Figure 3 As shown in the figure, by setting the included angle β between the second part 122 and the side wall of the groove 110 to 60°~65°, the bevel 120 can have an inclined second part 122, which reduces the difficulty of the welding rod entering the welding groove 400 in subsequent welding work, reduces the welding rod placement time to a certain extent, and improves the welding efficiency of the embedded part 100.

[0086] Specifically, the included angle β between the second part 122 and the sidewall of the groove 110 is 60°, 61°, 62°, 63°, 64° or 65°, etc.

[0087] In summary, the included angle β between the second part 122 and the side wall of the groove 110 is greater than the included angle α between the first part 121 and the side wall of the groove 110, so that the bevel 120 has the first part 121 and the second part 122 with different inclination angles, which can facilitate the entry of the welding rod into the welding groove 400 and reduce the welding amount of the embedded part 100.

[0088] In some embodiments, combined with Figure 3 and Figure 4 As shown, the first part 121 and the second part 122 are connected by a second arc segment 150, the radius of which ranges from 5mm to 10mm. It should be noted that the radius of the second arc segment 150 can be understood as... Figure 4 The radius R2 shown is set to 5mm~10mm for the second arc segment 150 so that there is a welding transition area at the connection between the first part 121 and the second part 122. This avoids the phenomenon of incomplete fusion at the connection between the first part 121 and the second part 122 when welding the welding groove 400, and reduces the welding difficulty at the connection between the first part 121 and the second part 122, thereby improving the welding quality of the welding groove 400 of the embedded part 100.

[0089] Specifically, the radius R2 of the second arc segment 150 is 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, etc.

[0090] In summary, by providing a first arc segment 140 transition connection between the side wall and bottom wall of the groove 110 and a second arc segment 150 transition connection between the first part 121 and the second part 122, this application can reduce the welding difficulty of the embedded part 100 and improve the welding effect of the embedded part 100.

[0091] In some embodiments, such as Figure 3 As shown, in the thickness direction of the embedded part 100, the height of the first part 121 ranges from 8mm to 10mm. It should be noted that the height range of the first part 121 can be understood as... Figure 3 The height H2 shown is set to 8mm~10mm for the first part 121 so that the bevel 120 can form the first part 121 with an inclined angle and reduce the amount of welding of the embedded part 100 in the first part 121.

[0092] Specifically, the height H2 of the first part 121 is 8mm, 9mm or 10mm, etc.

[0093] In some embodiments, combined with Figure 1 and Figure 3 As shown, when connecting the embedded parts 100 of two parts to be welded, the two embedded parts 100 are controlled to be spaced apart, and the minimum distance between the two embedded parts 100 is 1mm~4mm. It should be noted that the minimum distance between the two spaced-apart embedded parts 100 can be understood as... Figure 3 The L2 shown is achieved by setting the minimum distance L2 between the embedded parts 100 to 1mm~4mm, so as to reserve a welding root gap between the two embedded parts 100. This allows sufficient space to be provided for the electric arc or molten pool during welding, so that heat can penetrate the root of the joint and ensure the welding quality of the embedded parts 100. At the same time, it can also offset part of the shrinkage of the weld 130, avoid excessive internal stress in the embedded parts 100 due to shrinkage, and thus avoid cracking of the weld 130 or deformation of the embedded parts 100.

[0094] Specifically, when the embedded parts 100 of two parts to be welded are joined together, the minimum distance L2 between the embedded parts 100 is 1mm, 2mm, 3mm or 4mm, etc.

[0095] In some embodiments, the bottom of the support platform 200 is hollow, and the height of the support platform 200 is not less than 70cm. This facilitates welding of the embedded part 100 on the support platform 200, reduces the difficulty of welding the embedded part 100, and avoids flipping the embedded part 100 during the welding process.

[0096] In some embodiments, after the support platform 200 is fabricated on the workshop manufacturing platform, a laser tracker is used to measure and level it to ensure the levelness of the support platform 200, so as to ensure the alignment of the two embedded parts 100 during the subsequent docking, which is conducive to the welding work of the two embedded parts 100.

[0097] In some embodiments, combined with Figure 1 and Figure 6 As shown, before spot welding the two embedded parts 100, the following steps are included: S04, cleaning the bevel 120 of oil or oxide layer with a wire brush or polishing disc. Since the surface of the embedded parts 100 is usually covered with impurities such as oxide scale, rust, oil, moisture, paint coating, or dust, these substances will decompose at the high welding temperature to produce gases (such as carbon dioxide from oil combustion, hydrogen from moisture evaporation, etc.) or form brittle compounds, leading to fatal defects such as porosity, slag inclusions, and cracks in the weld 130. Therefore, this application uses a wire brush or polishing disc to clean the bevel 120, which can remove impurities and defects at the weld joint of the embedded parts 100, improve the welding processability of the weld joint of the embedded parts 100, and thus ensure the welding quality and mechanical properties of the embedded parts 100.

[0098] In some embodiments, combined with Figure 1 and Figure 6 As shown, the multi-layer welding fixation performed simultaneously in two welding grooves 400 located on opposite sides of the cavity 300 includes the following steps:

[0099] Manual argon arc welding was used, and φ2.0mm welding wire was used for the root pass.

[0100] In the above steps, the φ2.0mm welding wire can continuously and uniformly fill the welding groove 400 with metal, ensuring the root penetration of the weld 130 while avoiding problems such as incomplete root penetration, burn-through, and concavity that are prone to occur when using welding rods for root pass in the prior art. This results in uniform root formation of the weld 130 between the two embedded parts 100, improving the crack resistance of the weld 130 and thus improving the welding quality of the embedded parts 100.

[0101] Manual argon arc welding is used to perform filler welding on the basis of the root pass welding;

[0102] The above steps can prevent excessive heat input during manual arc welding from easily puncturing the root of the weld seam 130 of the φ2.0mm welding wire, thus ensuring the welding quality of the embedded part 100 to a certain extent.

[0103] Manual arc welding was used with φ4.0mm welding rods for filler welding, and the temperature between 600 weld layers did not exceed 250℃;

[0104] It should be noted that, due to the relatively high cost of wire welding equipment and consumables, while shielded metal arc welding (SMAW) equipment is highly versatile, has low electrode procurement costs, and requires no additional shielding gas supply, the use of φ4.0mm electrodes for filler welding in the above steps can achieve high-quality welding at a low cost, reducing the overall welding cost of the embedded part 100. At the same time, by setting the temperature between the weld layers 600 to no more than 250℃, excessively high temperatures between the weld layers 600 can prevent the subsequent weld layer 600 from undergoing prolonged high-temperature tempering of the previous weld layer 600, thereby preventing a decrease in the strength of the weld layer 600 metal and ensuring the stability of the mechanical properties of the weld layer 600.

[0105] It should be noted that after each 600 welding layer is completed, attention should be paid to checking the deformation of the embedded part 100 and adjusting the welding sequence in a timely manner to control the welding deformation of the embedded part 100 and ensure the welding quality of the embedded part 100.

[0106] When welding to 700 on the cap surface, manual arc welding is used, and φ3.2mm welding rods are switched for filler welding.

[0107] In the above steps, to prevent excessive heat input in the connection area between the φ3.2mm welding rod and the base material of the embedded part 100, resulting in undercut or poor welding quality of the cover surface 700, thereby improving the welding strength of the embedded part 100.

[0108] In a specific example, during welding, the reinforcement height, width, and transition smoothness of the 700mm weld seam can be precisely controlled by adjusting the welding technique (straight-line, serrated, or crescent-shaped, etc.), thus meeting the strict requirements of the project for the appearance of the 130mm weld seam.

[0109] Meanwhile, by using φ3.2mm welding rods when welding the cover 700, the aesthetics of the cover 700 can be improved.

[0110] It should be noted that by simultaneously performing multi-layer welding and fixing in the two welding grooves 400 located on opposite sides of the cavity 300 through the above steps, the welding effect of the embedded part 100 can be guaranteed.

[0111] In summary, by performing multi-layer welding and fixing steps on the two welding grooves 400 located on opposite sides of the cavity 300, it is possible to avoid moving or flipping the embedded part 100 during the manufacturing process, improve the welding production efficiency of the embedded part 100, and ensure the inspection pass rate of the weld 130. This can effectively prevent the weld 130 of the embedded part 100 of the entire fusion device SSAT tooling from failing during operation.

[0112] In some embodiments, combined with Figure 1 and Figure 6As shown, after multi-layer welding and fixing are performed in the two welding grooves 400 located on opposite sides of the cavity 300, the following steps are also included: S7, grinding the pre-embedded part 100 after welding.

[0113] It should be noted that, since weld beads, spatter, undercut, porosity and slag inclusions may remain on the surface of weld 130, these defects not only affect the appearance of the embedded part 100, but may also become stress concentration points. By grinding the welded embedded part 100, weld beads and spatter can be ground flat, slight undercut can be corrected, and exposed parts of porosity and slag inclusions on the surface of weld 130 can be removed, so that the transition between weld 130 and embedded part 100 is smooth and meets the appearance acceptance standards of embedded part 100.

[0114] In some embodiments, the welding quality of the embedded part 100 can be inspected by visual inspection, penetrant testing, and ultrasonic testing.

[0115] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0116] Figure 2 The illustration shows a single embedded part 100 with three lifting holes 160 for illustrative purposes. However, after reading the above technical solution, those skilled in the art will obviously understand that applying this solution to a technical solution with one, two, four or more lifting holes 160 would also fall within the protection scope of this invention.

[0117] Other components of the welding method for the embedded part 100 of the SSAT tooling for a fusion device according to embodiments of the present invention, such as the specific structure, materials, and functions of welding wire and welding rod, are known to those skilled in the art and will not be described in detail here.

[0118] In the description of this specification, references to terms such as "embodiment," "example," 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 the invention. In this specification, 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.

[0119] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A welding method for an embedded part (100) in a fusion device SSAT fixture, characterized in that, Includes the following steps: Grooves (110) and bevels (120) are machined on the welding surface of the embedded part (100) to be welded. In the thickness direction of the embedded part (100), the bevels (120) are symmetrically arranged on opposite sides of the grooves (110). The embedded part (100) of the part to be welded is hoisted onto the support platform (200); The two embedded parts (100) of the two parts to be welded are joined together, the grooves (110) on the two embedded parts (100) are arranged opposite each other to form a cavity (300), and the bevels (120) on the two embedded parts (100) are arranged opposite each other to form a welding groove (400). The two embedded parts (100) are spot welded and fixed in the welding groove (400); An arc-starting plate (500) is provided at each of the opposite ends of the weld (130) of the two embedded parts (100), and the material of the arc-starting plate (500) is the same as that of the embedded part (100). Simultaneously, multi-layer welding is performed in the two welding grooves (400) located on opposite sides of the cavity (300).

2. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 1, characterized in that, The groove depth of the groove (110) is in the range of 5mm to 10mm; And / or, in the thickness direction of the embedded part (100), the height of the groove (110) ranges from 20mm to 30mm.

3. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 1, characterized in that, The sidewall of the groove (110) and the bottom wall of the groove (110) are connected by a first arc segment (140), the radius of which is in the range of 5mm to 10mm.

4. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 1, characterized in that, In the thickness direction of the embedded part (100), the bevel (120) has a first part (121) and a second part (122) with different inclination angles, and the first part (121) is connected between the second part (122) and the groove (110); Wherein, the included angle between the first part (121) and the side wall of the groove (110) is in the range of 40°~45°; and / or, the included angle between the second part (122) and the side wall of the groove (110) is in the range of 60°~65°.

5. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 4, characterized in that, The first part (121) and the second part (122) are connected by a second arc segment (150), the radius of which is in the range of 5mm to 10mm.

6. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 4, characterized in that, In the thickness direction of the embedded part (100), the height of the first part (121) ranges from 8mm to 10mm.

7. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 1, characterized in that, When connecting the embedded parts (100) of two parts to be welded, the two embedded parts (100) are controlled to be spaced apart and the minimum distance between the two embedded parts (100) is 1mm to 4mm.

8. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 1, characterized in that, The bottom of the support platform (200) is hollow, and the height of the support platform (200) is not less than 70cm.

9. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 1, characterized in that, Before spot welding the two embedded parts (100), the following steps are also included: Use a wire brush or polishing pad to clean the oil or oxide layer on the bevel (120).

10. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 1, characterized in that, Simultaneously, multi-layer welding and fixing are performed within the two welding grooves (400) located on opposite sides of the cavity (300), including the following steps: Manual argon arc welding was used, and φ2.0mm welding wire was used for the root pass. The filler welding is performed on the basis of the root pass welding using manual argon arc welding. Manual arc welding was used with φ4.0mm welding rods for filler welding, and the temperature between the weld layers (600) did not exceed 250℃; When welding to the cover (700), manual arc welding is used and φ3.2mm welding rods are switched for filler welding.

11. The welding method for the embedded part (100) of the SSAT tooling for a fusion device according to claim 1, characterized in that, After performing multi-layer welding and fixing in the two welding grooves (400) located on opposite sides of the cavity (300), the method further includes the following steps: The pre-embedded part (100) after welding is ground.

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