Auxiliary device for special-shaped curved surface welding deformation control and machining and auxiliary welding method

Abstract

The invention discloses an auxiliary device for special-shaped curved surface welding deformation control and a machining and auxiliary welding method. The auxiliary device is used for being connected and fixed with a special-shaped curved surface arc-shaped structural part in a shaping mode and disassembled after welding shaping is carried out, and the auxiliary device is composed of a profiling panel, an angle rib plate and a reinforcing rib plate; the profiling panel is provided with a plate surface structure with the same curved surface as the special-shaped curved-surface arc-shaped structural part, a reinforcing rib plate is fixedly welded to the longitudinal center line of the back face of the plate surface and is perpendicular to the plate surface, and a plurality of sets of angle rib plates which are oppositely arranged are arranged on the two longitudinal sides of the reinforcing rib plate at intervals. A plurality of bolt holes used for being detachably connected, shaped and fixed with the special-shaped curved-surface arc-shaped structural parts are formed in the profiling panels on the two longitudinal sides of the reinforcing rib plates at intervals; the machining and auxiliary welding of the auxiliary device comprises the steps of profiling panel preparation, construction welding and the like. Through application of a profiling technology, angle control, forced welding and a lightweight technology, the welding angle of the special-shaped curved surface can be guaranteed, the welding quality is guaranteed, and the operation efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding auxiliary equipment design, in particular to the technical field of special-shaped welding auxiliary shaping tool design, and specifically relates to an auxiliary device for controlling special-shaped curved surface welding deformation and a processing and auxiliary welding method. Background Art

[0002] In the production of railway freight car bodies, the side wall connecting plate and the end wall connecting plate in the end wall structure need to be double-sided welded, and after the welding is completed, the side wall connecting plate should be a special-shaped curved surface, and the angle of each cross section of the end wall connecting plate is different. At the same time, the welding deformation is required to meet the design requirements. At present, there is no good method and forming mold for welding such special-shaped curved surfaces, and the welding and forming quality are difficult to control. It is necessary to change the current welding process and design a device to prevent welding deformation to improve the quality of the special-shaped curved surface welding structure. Summary of the invention

[0003] The present invention discloses an auxiliary device for controlling deformation of special-shaped curved surface welding and a processing and auxiliary welding method according to the shortcomings of the prior art. The purpose of the present invention is to provide a welding auxiliary device and a processing and auxiliary welding method that can control the shape of the curved surface and reduce the deformation after welding.

[0004] The present invention is achieved through the following technical solutions:

[0005] An auxiliary device for controlling deformation of welding of a special-shaped curved surface, wherein the special-shaped curved surface is an irregular curved surface of a special-shaped curved surface arc-shaped structural member, characterized in that the auxiliary device is used to be connected and fixed with the special-shaped curved surface arc-shaped structural member in a final manner and disassembled after welding and finalization, and is composed of a contoured panel, an angle rib plate and a reinforcing rib plate;

[0006] The contoured panel has a plate surface structure with the same curve as the special-shaped curved arc structural member. A reinforcing rib plate is welded and fixedly arranged on the back side of the plate surface perpendicular to the longitudinal center line of the plate surface. Arrays of relatively arranged angle rib plates are arranged at intervals along the longitudinal sides of the reinforcing rib plate. Several bolt holes for detachably connecting and fixing with the special-shaped curved arc structural member are arranged at intervals on the contoured panels on the longitudinal sides of the reinforcing rib plate.

[0007] Furthermore, the angle rib plates are triangular structures, and two angle rib plates of each group are arranged on both sides of the reinforcing rib plate. The two sides of each angle rib plate are respectively welded and supported vertically to the contoured panel or the reinforcing rib plate surface.

[0008] The processing and auxiliary welding method of the auxiliary device for controlling deformation of special-shaped curved surface welding of the present invention includes the processing and auxiliary welding of the auxiliary device, and specifically includes the following steps:

[0009] Auxiliary device processing:

[0010] S1. Preparing a profiling panel, designing and manufacturing a profiling panel having the same shape and curved surface structure as the curved surface of the special-shaped curved surface arc structure according to the structural parameters of the special-shaped curved surface arc structure;

[0011] S2. A reinforcing rib plate is welded and fixedly arranged perpendicularly to the plate surface on the center line of the back of the contoured panel. A plurality of angle rib plates are welded and fixedly arranged on both sides of the longitudinal direction of the reinforcing rib plate. Adjacent groups of angle rib plates are arranged at equal intervals. A plurality of bolt holes are arranged at equal intervals on the reinforcing rib plate.

[0012] Auxiliary welding:

[0013] S3, connecting and fixing the contoured panel to the special-shaped curved surface arc structure member through connecting bolts, and the gap between the contoured panel and the special-shaped curved surface arc structure member is less than 0.2mm;

[0014] S4. Welding of special-shaped curved arc-shaped structural parts and welding connectors; using non-inert gas shielded welding to weld the curved surface structural weld from one end to the other;

[0015] The size of the welding foot is 3mm×3mm, and the welding specifications include: the current is less than 150A, the voltage is 16-18V; first complete the welding of the front weld, and then weld the back weld in the same direction;

[0016] S5. After the welded workpiece has completely cooled, remove the connecting bolts and take out the auxiliary device.

[0017] The auxiliary device and method of the present invention are suitable for controlling the welding deformation of special-shaped curved surfaces. The auxiliary device ensures that the angle of the special-shaped curved surface is consistent with the design angle by reducing or eliminating the welding deformation of the special-shaped curved surface. Before welding the special-shaped curved surface of the side wall connecting plate, the auxiliary device and the special-shaped curved surface are completely and tightly fastened by bolts, and then removed when the welding is completely cooled to ensure that the angle of the special-shaped curved surface of the side wall connecting plate is completely consistent with the design angle. The auxiliary device of the present invention adopts a 3mm thick stainless steel plate, which reduces its own weight and is easy to operate. Through the use of the auxiliary device of the present invention, the subsequent process of correcting the special-shaped curved surface is completely eliminated, which improves product quality, reduces the labor intensity of employees, and improves production efficiency.

[0018] The auxiliary device for controlling deformation of welding of special-shaped curved surface of the present invention uses profiling technology, angle control, forced welding and lightweight technology, uses ribs of different angles to control the angle of the profiling curved surface, and then fastens the profiling curved surface with the special-shaped curved surface of the side wall connecting plate through bolts. After welding, the device is removed after the double-sided welding of the special-shaped curved surface is cooled, which can ensure the angle of the special-shaped curved surface of the side wall connecting plate, ensure product quality, improve operation efficiency and reduce the labor intensity of employees. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the auxiliary device for controlling deformation of special-shaped curved surface welding of the present invention;

[0020] Figure 2 It is a schematic diagram of the application state of the auxiliary device of the present invention;

[0021] Figure 3 yes Figure 2 Enlarged schematic diagram of part D in the middle.

[0022] In the figure, 1 is the contoured panel, 2 is the angle rib plate, 3 is the bolt hole, 4 is the reinforcing rib plate, 5 is the side wall connecting plate, 6 is the end wall frame connecting plate, 7 is the connecting bolt, 8 is the double-sided weld, 81 is the upper surface weld, 82 is the lower surface weld, and A is an auxiliary device. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies that are the same or similar to the present invention do not exceed the scope of protection of the present invention.

[0024] Combined with the attached pictures.

[0025] As shown in the figure, an auxiliary device for controlling deformation of special-shaped curved surface welding, wherein the special-shaped curved surface is an irregular curved surface of a special-shaped curved surface arc-shaped structural member, and the auxiliary device is used to be fixedly connected with the special-shaped curved surface arc-shaped structural member and disassembled after welding and shaping, and is composed of a contoured panel, an angle rib plate and a reinforcing rib plate;

[0026] The contoured panel has a plate surface structure with the same curve as the special-shaped curved arc structural member. A reinforcing rib plate is welded and fixedly arranged on the back side of the plate surface perpendicular to the longitudinal center line of the plate surface. Arrays of relatively arranged angle rib plates are arranged at intervals along the longitudinal sides of the reinforcing rib plate. Several bolt holes for detachably connecting and fixing with the special-shaped curved arc structural member are arranged at intervals on the contoured panels on the longitudinal sides of the reinforcing rib plate.

[0027] The angle rib plate is a triangular structure, and two angle rib plates of each group are arranged on both sides of the reinforcing rib plate. The two sides of each angle rib plate are respectively welded vertically to the contoured panel or the reinforcing rib plate surface for support and fixation.

[0028] The invention relates to a processing and auxiliary welding method of an auxiliary device for controlling deformation of welding of a special-shaped curved surface, including processing and auxiliary welding of the auxiliary device:

[0029] Auxiliary device processing:

[0030] S1. Preparing a profiling panel, designing and manufacturing a profiling panel having the same shape and curved surface structure as the curved surface of the special-shaped curved surface arc structure according to the structural parameters of the special-shaped curved surface arc structure;

[0031] S2. A reinforcing rib plate is welded and fixedly arranged perpendicularly to the plate surface on the center line of the back of the contoured panel. A plurality of angle rib plates are welded and fixedly arranged on both sides of the longitudinal direction of the reinforcing rib plate. Adjacent groups of angle rib plates are arranged at equal intervals. A plurality of bolt holes are arranged at equal intervals on the reinforcing rib plate.

[0032] Auxiliary welding:

[0033] S3, connecting and fixing the contoured panel to the special-shaped curved surface arc structure member through connecting bolts, and the gap between the contoured panel and the special-shaped curved surface arc structure member is less than 0.2mm;

[0034] S4. Welding of special-shaped curved arc-shaped structural parts and welding connectors; using metal-electrode non-inert gas shielded welding to weld the curved surface structural weld from one end to the other end;

[0035] The size of the welding foot is 3mm×3mm, and the welding specifications include: the current is less than 150A, the voltage is 16-18V; first complete the welding of the front weld, and then weld the back weld in the same direction;

[0036] S5. After the welded workpiece has completely cooled, remove the connecting bolts and take out the auxiliary device.

[0037] In this embodiment, the auxiliary device is used for welding the special-shaped curved surface of the side wall connecting plate 5. The side wall connecting plate 5 in this embodiment is a welding frame of the vehicle box body. The angle of each cross section of the side wall connecting plate 5 is different. Since the original process method is to weld the special-shaped curved surface of the side wall connecting plate 5 in a free state, the welding deformation causes each cross-sectional angle to be greatly different from the design angle. After welding, the position of the welding deformation is corrected by applying external force such as baking or knocking. After correction, the requirements are often not met, and there is still a deformation of 0.5-1mm, which cannot fully guarantee the product quality. The labor intensity of employees is high and the operation time is long.

[0038] As shown in the figure, the side wall connecting plate 5 of this embodiment is welded to one side of the end wall connecting plate 6, and the rear end wall connecting plate 6 is vertically fixed to the side wall connecting plate 5 after welding. The welding edge of the end wall connecting plate 6 needs to be welded on both sides, and after the assembly welding is completed, the side wall connecting plate 5 should be a special-shaped curved surface, and the angle of each cross section of the end wall connecting plate 6 is different. The auxiliary device and method of the present invention are suitable for controlling the welding deformation of the special-shaped curved surface of the export railway freight car, and the purpose is to ensure that the angle of the special-shaped curved surface is consistent with the design angle by reducing or eliminating the welding deformation of the special-shaped curved surface. A device is designed to be completely consistent with the angle of the anisotropic curved surface, which is composed of a profiling panel 1, an angle rib plate 2, and a reinforcing rib plate 4. The two-dimensional dimensions of the profiling panel 1 and the anisotropic curved surface of the side wall connecting plate 5 are completely consistent. There are process bolt holes 3 on the profiling curved surface, and the position of the bolt holes 3 is consistent with the hole on the anisotropic curved surface. The sum of the obtuse angles of the two angle rib plates 2 arranged relatively in the same cross section is 180°. The angles of the two angle rib plates 2 in cross sections at different positions are different. The two angle rib plates 2 at the same cross-sectional position are connected to the profiling panel 1, so that the angle of the profiling panel 1 is consistent with the design angle, and the angle rib plates 2 are evenly distributed on both sides of the hole. Before welding the anisotropic curved surface of the side wall connecting plate 5, the auxiliary device of the present invention is completely and tightly fastened to the anisotropic curved surface by bolts, and it is removed when it is completely cooled after welding to ensure that the angle of the anisotropic curved surface of the side wall connecting plate 5 is completely consistent with the design angle.

[0039] The auxiliary device in this embodiment uses a 3mm thick stainless steel plate, which reduces its own weight and can be operated by two people. After using the device, the work content of correcting the special-shaped curved surface is completely eliminated, which greatly improves the product quality, reduces the operation time by 50%, greatly reduces the labor intensity of employees, and improves production efficiency. The innovative technologies involved include core technologies such as profiling technology, angle control, lightweight, and forced welding.

Claims

1. An auxiliary device for controlling deformation of welding of a special-shaped curved surface, wherein the special-shaped curved surface is an irregular curved surface of a special-shaped curved surface arc-shaped structural part, characterized in that: The auxiliary device is used to connect and fix with the special-shaped curved surface welding parent material and disassemble after welding and shaping, and is composed of a contoured panel, an angle rib plate and a reinforcing rib plate; The contoured panel has a plate surface structure with the same curve as the special-shaped curved surface welding parent material. A reinforcing rib plate is fixedly arranged on the back side of the plate surface with the longitudinal center line perpendicular to the plate surface welding. Arrays of relatively arranged angle rib plates are arranged at intervals along the longitudinal sides of the reinforcing rib plate. Several bolt holes for detachably connecting and fixing with the special-shaped curved surface welding parent material are arranged at intervals on the contoured panels on the longitudinal sides of the reinforcing rib plate.

2. The auxiliary device for controlling deformation of special-shaped curved surface welding according to claim 1, characterized in that: The angle rib plates are triangular structures, and two angle rib plates of each group are arranged on both sides of the reinforcing rib plate. The two sides of each angle rib plate are respectively welded vertically to the contoured panel or the reinforcing rib plate surface for support and fixation.

3. A method for processing an auxiliary device for controlling deformation of special-shaped curved surface welding, characterized in that The following steps are involved: S1. Preparing a profiling panel, designing and manufacturing a profiling panel having the same shape and curved surface structure as the curved surface of the special-shaped curved surface arc structure according to the structural parameters of the special-shaped curved surface arc structure; S2. A reinforcing rib plate is welded and fixed perpendicular to the plate surface on the center line of the back of the contoured panel. A plurality of groups of angle rib plates are welded and fixed on both sides of the longitudinal direction of the reinforcing rib plate. Adjacent groups of angle rib plates are arranged at equal intervals, and a plurality of bolt holes are arranged at equal intervals on the reinforcing rib plate.

4. An auxiliary welding method for an auxiliary device for controlling deformation of special-shaped curved surface welding, characterized in that The following steps are involved: S3, connecting and fixing the contoured panel to the special-shaped curved surface arc structure member through connecting bolts, and the gap between the contoured panel and the special-shaped curved surface arc structure member is less than 0.2mm; S4. Welding of special-shaped curved arc-shaped structural parts and welding connectors; using metal-electrode non-inert gas shielded welding to weld the curved surface structural weld from one end to the other end; The size of the welding foot is 3mm×3mm, and the welding specifications include: the current is less than 150A, the voltage is 16-18V; first complete the welding of the front weld, and then weld the back weld in the same direction; S5. After the welded workpiece has completely cooled, remove the connecting bolts and take out the auxiliary device.

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