Device and method for welding longitudinal mounting edge of split casing

Abstract

The device and method for welding longitudinal mounting edge of plate welding split-open machine case, which comprises a base, support half-rings are arranged on both sides of the base along the center line direction of the base, first pressing assemblies are arranged at intervals in the circumferential direction of the two support half-rings, and first grooves are arranged on the opposite sides of the first pressing assemblies, the first grooves are used for placing and limiting the half-ring plates in the axial direction of the half-ring plates, and the first pressing assemblies are used for pressing the half-ring plates. The welding efficiency is improved, and the welding deformation in the welding process is avoided.

Description

Technical Field

[0001] This invention belongs to the field of sample processing methods, and particularly relates to a sheet metal welding device and welding method for welding the longitudinal mounting edge of a split casing. Background Technology

[0002] The existing casing has a semi-ring plate with a longitudinal mounting edge, which is a protrusion on both sides of the semi-ring plate in an integrated manner. The longitudinal mounting edge needs to be welded to the welded part before it is installed on the casing. The existing welding method is to use a support frame to fix the semi-ring plate and complete the welding of the longitudinal mounting edge to the welded part. However, the support frame method cannot adjust the gap between the longitudinal mounting edge and the welded part. Generally, the gap between the welded part and the longitudinal mounting edge after the initial position adjustment is 1mm. With the influence of collisions or slight vibrations during the welding process, and because the opening tension of the longitudinal mounting edge of the non-integral ring plate welding casing is large, the gap between the welded part and the longitudinal mounting edge increases to 2mm. This results in poor flatness of the welded longitudinal mounting edge, out-of-tolerance opening chord length, and low welding efficiency between the longitudinal mounting edge and the welded part.

[0003] In view of this, the present invention is hereby proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device and method for welding the longitudinal mounting edge of a sheet metal split-type casing, at least solving the technical problem of low efficiency in welding the longitudinal mounting edge and welded parts in existing devices. The technical solution of this invention has many beneficial effects, as described below:

[0005] A welding device for longitudinal mounting edge of sheet metal split-type casing is provided, which is suitable for welding longitudinal mounting edge of semi-ring sheet metal to welded parts. It includes a base, and supporting semi-rings are respectively provided on both sides of the base and along the center line of the base. The two supporting semi-rings are provided with a first clamping component at a circumferential interval and a first groove is provided on the opposite side. The first groove is used to place the semi-ring sheet metal and limit the semi-ring sheet metal in the axial direction. The first clamping component is used to clamp the semi-ring sheet metal.

[0006] Weight reduction holes are provided at intervals on the base, located between the two supporting semi-rings;

[0007] The base has dark patterns on both sides of the supporting semi-ring, along the center line of the base. The dark patterns are used for the initial positioning of the mating parts.

[0008] A second groove is provided on the base and near the position of the weight reduction hole. The second groove is used to install the adjustable expansion block assembly. The adjustable expansion block assembly is used to adjust the gap between the longitudinal mounting edge and the weldment before welding.

[0009] A first limiting component is installed on the base and near the side of the dark pattern facing away from the weight reduction hole. The first limiting component is used to limit the welded part in the center line direction of the base during welding.

[0010] The base and the adjacent weldment are provided with two side positions in the center line direction, and the second limiting components limit the movement of the weldment in the center line direction during welding.

[0011] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0012] This invention, through the arrangement of two supporting semi-rings, a first clamping component, an adjustable expansion block component, and a second limiting component, can clamp the semi-ring sheet metal during the welding process and adjust the gap between the welded part and the longitudinal mounting edge, ensuring welding efficiency. It reduces welding deformation, controls the flatness deformation of the longitudinal mounting edge through a reasonable welding method, meets subsequent machining requirements, improves the stability of the part processing, increases the part's pass rate and processing efficiency, and satisfies the process requirements for machining the semi-ring sheet metal after longitudinal mounting of the welded housing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 Front view of the structure of this invention;

[0015] Figure 2 This is a top view of the structure of the present invention;

[0016] Figure 3 This is a schematic diagram illustrating the welding sequence of the welding points in the method of the present invention;

[0017] Figure 4 This is a front view schematic diagram of the first limiting block of the present invention;

[0018] in:

[0019] 1. Base; 11. Weight reduction hole; 12. Second groove; 2. Support semi-ring; 21. First groove; 31. First pressure plate; 32. First bolt; 4. Welded part; 51. Adjustable expansion block; 52. Nut; 53. Screw; 61. First limit block; 62. Second bolt; 611. Third groove; 612. Second rectangular hole; 7. Support leg; 8. Pin hole; 9. Support plate; 10. Screw. Detailed Implementation

[0020] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0022] The sheet metal welding longitudinal mounting device for the split-type casing of the present invention is described in detail below. Figures 1 to 2 As shown, this is applicable to welding the longitudinal mounting edge of a semi-ring plate to a weldment 4. It includes a base 1, with supporting semi-rings 2 arranged on both sides of the base 1 along its centerline. The two supporting semi-rings 2 are circumferentially spaced with first clamping components and have first grooves 21 on their opposing sides. The first grooves 21 are used to place the semi-ring plate and limit its axial movement. The first clamping components are used to clamp the semi-ring plate. After the semi-ring plate is placed in the first groove 21, it is flush with the height of the supporting semi-rings 2, ensuring that the first clamping components clamp the semi-ring plate and preventing displacement during welding.

[0023] Weight reduction holes 11 are provided at intervals on the base 1 and between the two supporting semi-rings 2. Generally, the base 1 is installed on the bracket and welded. The appropriate welding height facilitates the welding of the operator. The weight reduction holes 11 can reduce the weight of the base 1 and make it easier to place the base 1 on the bracket.

[0024] The base 1 has hidden patterns on both sides of the supporting semi-ring 2, along the center line of the base 1. The hidden patterns are used for the initial positioning of the mating parts. For example, the hidden patterns with white lines are convenient for initial positioning.

[0025] A second groove 12 is provided on the base 1 and near the weight reduction hole 11. The second groove 12 is used to install the adjustable expansion block 51 assembly. The adjustable expansion block 51 assembly is used to adjust the gap between the longitudinal mounting edge and the weldment 4 before welding. During the welding process, the semi-ring plate is prone to high-temperature deformation. When a large gap occurs during welding, the gap between the longitudinal mounting edge and the weldment 4 is adjusted by the adjustable expansion block 51 assembly until a seamless state is reached before welding, thereby ensuring the quality of welding, avoiding welding deformation, and improving welding efficiency.

[0026] A first limiting component is installed on the side of the base 1, near the dark pattern facing away from the weight reduction hole 11. The first limiting component is used to limit the weldment 4 in the centerline direction of the base 1 during welding. The first limiting component, for example, the use of a rectangular block, resists the side of the weldment 4, preventing the weldment 4 from moving during the welding process and in the centerline direction of the base 1.

[0027] On the base 1 and near the welded part 4, two second limiting components are respectively provided on its two sides in the centerline direction. The second limiting components limit the movement of the welded part 4 in the centerline direction during welding, thus preventing the welded part 4 from moving in the centerline direction during the welding process.

[0028] As a specific implementation provided in this case, the supporting semi-ring is provided with two circumferentially spaced first holes with internal threads (not shown in the figure). The first clamping assembly includes a first pressure plate 31 and a first bolt 32 with a lock head. The first pressure plate 31 has a first rectangular hole (not shown in the figure) for installing the first bolt 32. The size of the lock head is larger than the size of the first rectangular hole.

[0029] After the supporting half-ring 2 is installed in the first groove 21, the first bolt 32 is rotated to cause the lock head to press against the first pressure plate 31, thus completing the pressing of the first pressure plate 31 against the half-ring plate.

[0030] As a specific embodiment provided in this case, the welded part 4 is a rectangular structure, and its length is adapted to the length of the longitudinal mounting edge on the semi-circular plate. The adjustable expansion block 51 assembly includes an adjustable expansion block 51, a nut 52, and a screw 53. The length of the adjustable expansion block 51 is adapted to the length of the second groove 12, wherein:

[0031] Nut 52 is installed at the edge of the second groove 12 near the adjacent side, and one end of screw 53 passes through nut 52 and is connected to adjustable expansion block 51;

[0032] After assembling the semi-ring plate and the welded part 4, rotate the screw 53 to make the longitudinal mounting edge seamlessly connect with the welded part 4.

[0033] As a specific implementation provided in this case, the first limiting component includes a first limiting block 61 and a second bolt 62 with a locking head. The base 1 has a second hole with internal threads at a preset position, wherein:

[0034] After the first limiting block 61 comes into close contact with one side of the mating part, the second bolt 62 is rotated and inserted into the second hole, causing the lock head to press against the limiting block to complete the limiting of the welding line by the first limiting block 61.

[0035] As a specific implementation method provided in this case, see Figure 4 As shown, a third groove 611 is provided on the side of the first limiting block 61 that contacts the welded part 4, and a second rectangular hole is provided in the central area of ​​the first limiting block 61. The second rectangular hole is used to assemble the second bolt 62, wherein:

[0036] The third groove 611 causes the first limiting block 61 to form an extended section. The extended section is in close contact with the top surface of the welded part 4. When the second bolt 62 is rotated to fix the first limiting block 61, the extended section provides universal positioning for the first limiting block 61.

[0037] Multiple pin holes 8 are provided on the base 1 along the center line of the welded part 4, and the welded part 4 is limited by the insertion of the pins.

[0038] As a specific embodiment provided in this case, an adjustment component is provided on the base 1 at the dark pattern position. The adjustment component is used to adjust the height of the welded part 4 in the vertical direction. The adjustment component includes, for example, a support plate 9 and a screw 10. The support plate 9 is placed on the dark pattern, and one end of the screw 10 passes through the base 1 (in a threaded manner) and is connected to the support plate 9. By rotating the screw 10, the height of the welded part 4 in the vertical direction can be adjusted.

[0039] Secondly, a welding method is provided, applicable to welding the longitudinal mounting edge of a semi-ring plate to the welding component 4. This method includes: using some or all of the aforementioned devices, specifically:

[0040] The semi-ring plate is arranged in the first groove 21. The first pressing component that supports the top of the semi-ring 2 presses the semi-ring plate, and then the first pressing components from the top of the semi-ring 2 to both sides press the semi-ring plate in sequence.

[0041] After assembling welded part 4, adjust the adjustable expansion block 51 assembly to adjust the gap between welded part 4 and the longitudinal mounting edge. The adjustable expansion block 51 assembly enables adjustment of the welding misalignment during the assembly and welding of the semi-ring sheet metal part and the longitudinal mounting edge to meet the requirement that the welding misalignment should not exceed 0.5mm.

[0042] The longitudinal mounting edge and the welding part 4 are welded by spot welding. The welding positions on both sides of the welding part 4 are continuously spot welded. After the spot welding is completed, the welding part 4 is welded from the spot welding position at the center point to both sides.

[0043] Welding sequence and stress analysis of longitudinal installation edges as follows Figure 3 As shown, the welding sequence for longitudinal mounting edges A1 and A2 starts from the middle of the mounting edges, proceeding according to welding sequences 1 and 2, and welding sequences 3 and 4 respectively. When welding in this sequence, the later welds are subjected to tensile stress from the earlier welds, in the opposite direction to the welding direction. Longitudinal mounting edge 1 is subjected to tensile heat forces f5 and f7 in the opposite direction, and longitudinal mounting edge A2 is subjected to tensile heat forces f6 and f8 in the opposite direction, preventing twisting or deformation of the longitudinal mounting edges after welding. The flatness of parts processed using this welding sequence is reduced from 3.2mm to 0.4mm, achieving a first-pass yield of 90%. With a small amount of auxiliary fitter correction, the process requirements are met.

[0044] This method effectively solves the problem of deformation of the longitudinal mounting edge, realizes three-dimensional spatial positioning full-surface support and clamping, optimizes and determines a reasonable welding sequence, controls the deformation of welded longitudinal mounting edge parts, improves the stability of the parts processing, increases the part qualification rate and processing efficiency, and greatly reduces production costs.

[0045] The product provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from the principles of the invention, and these improvements and modifications also fall within the protection scope of the invention claims.

Claims

1. A sheet metal welding device for welding longitudinal mounting edges of a split-type casing, suitable for welding longitudinal mounting edges on a semi-circular sheet metal to welded parts, characterized in that, The device includes a base, on both sides of the base and along the center line of the base, a supporting semi-ring is provided respectively, the two supporting semi-rings are provided with a first pressing component at a circumferential interval and a first groove is provided on the opposite side, the first groove is used to place the semi-ring sheet and limit the semi-ring sheet in the axial direction, and the first pressing component is used to press the semi-ring sheet. Weight reduction holes are provided at intervals on the base, located between the two supporting semi-rings; The base has dark patterns on both sides of the supporting semi-ring, along the center line of the base. The dark patterns are used for the initial positioning of the mating parts. A second groove is provided on the base and near the position of the weight reduction hole. The second groove is used to install the adjustable expansion block assembly. The adjustable expansion block assembly is used to adjust the gap between the longitudinal mounting edge and the weldment before welding. A first limiting component is installed on the base and near the side of the dark pattern facing away from the weight reduction hole. The first limiting component is used to limit the welded part in the center line direction of the base during welding. The base and the adjacent weldment are provided with two side positions in the center line direction, and the second limiting components limit the movement of the weldment in the center line direction during welding.

2. The sheet metal welding longitudinal mounting device for the split-type casing according to claim 1, characterized in that, The supporting semi-circumferential ring is provided with first holes with internal threads at circumferential intervals. The first clamping assembly includes a first pressure plate and a first bolt with a locking head. The first pressure plate has a first rectangular hole for installing the first bolt. The size of the locking head is larger than the size of the first rectangular hole. After the supporting half-ring is installed in the first groove, the first bolt is rotated to cause the lock head to press against the first pressure plate, thus completing the pressing of the first pressure plate against the half-ring plate.

3. The sheet metal welding longitudinal mounting device for the split-type casing according to claim 1, characterized in that, The welded component has a rectangular structure, and its length is adapted to the length of the longitudinal mounting edge on the semi-circular plate.

4. The sheet metal welding longitudinal mounting device for the split-type casing according to claim 1, characterized in that, The adjustable expansion block assembly includes an adjustable expansion block, a nut, and a screw. The length of the adjustable expansion block is adapted to the length of the second groove, wherein: The nut is installed at the edge of the second groove near the adjacent side, and one end of the screw passes through the nut and is connected to the adjustable expansion block; After assembling the semi-ring sheet metal and the welded parts, rotate the screw to make the longitudinal mounting edge seamlessly connect with the welded parts.

5. The sheet metal welding longitudinal mounting device for the split-type casing according to claim 1, characterized in that, The first limiting component includes a first limiting block and a second bolt with a locking head. The base has a second hole with internal threads at a preset position, wherein: After the first limiting block comes into close contact with one side of the mating part, the second bolt is rotated and inserted into the second hole, causing the lock head to press the first limiting block to complete the limiting of the welding line by the first limiting block.

6. The sheet metal welding longitudinal mounting device for the split-type casing according to claim 5, characterized in that, A third groove is provided on the side of the first limiting block that contacts the welded part, and a second rectangular hole is provided in the central area of ​​the first limiting block. The second rectangular hole is used to assemble the second bolt, wherein: The third groove causes the first limiting block to form an extended section, which is in close contact with the top surface of the welded part. When the second bolt is rotated to fix the first limiting block, the extended section provides universal positioning for the first limiting block.

7. The sheet metal welding longitudinal mounting device for the split-type casing according to claim 1, characterized in that, An adjustment component is provided on the base at the dark pattern position, and the adjustment component is used to adjust the height of the welded part in the vertical direction.

8. A welding method applicable to welding the longitudinal mounting edge of a semi-circular sheet metal to a weldment, characterized in that, The method includes using the apparatus as described in any one of claims 1 to 7.

9. The welding method according to claim 8, characterized in that, The method further includes: The semi-ring plate is disposed in the first groove. The first pressing component that supports the top of the semi-ring presses the semi-ring plate, and then the first pressing components that support the top of the semi-ring press the semi-ring plate from the top to both sides are pressed in sequence. After assembling the welded parts, adjust the adjustable expansion block assembly to adjust the gap between the welded parts and the longitudinal mounting edge; The longitudinal mounting edge and the weldment are welded by spot welding, and the welding positions on both sides of the weldment are welded by continuous spot welding. After spot welding is completed, the entire component is then welded outwards from the spot welding point at the center point to both sides.

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