A welding tool for special-shaped thin-walled parts

Abstract

The present invention relates to the technical field of welding tooling, and provides a welding tooling for special-shaped thin-walled parts, comprising a base assembly and a weld support assembly arranged on the base assembly, the weld support assembly comprising at least one group of weld support bars installed on the base assembly, the weld support bars being arranged inside the part to be welded, the extension direction of the length of the weld support bars extending along the weld of the part, the shape of the weld support bars being the same as the shape of the weld, and the weld support bars being configured to support the vicinity of both sides of all welds of the part; the weld support bars being able to rotate relative to the base assembly, the projection of the weld on the horizontal plane gradually approaching the inner side of the port from the port of the part, the weld support bars being able to rotate relative to the weld so that the welded part can be released from the weld support assembly from the port; a weld pressing assembly being arranged outside the part and configured to press against the outer wall of the vicinity of the weld.

Description

Technical Field

[0001] The invention belongs to the technical field of welding tooling, and in particular relates to a welding tooling for special-shaped thin-walled parts. Background Art

[0002] Many special-shaped thin-walled parts in the combustion chamber, tail nozzle and other components of aircraft engines need to be welded. For the parts with high requirements for the surface accuracy (i.e. the contour of the parts), positioning and clamping are required to ensure the accuracy of the parts after welding. Due to the insufficient rigidity of the parts themselves, large welding deformation is prone to occur during welding. Therefore, the welding tooling of the parts needs to support the back of the parts with a reverse support structure near the weld of the parts, and clamp the front of the parts with a clamping structure (the front of the parts here refers to the front of the weld, and the back of the parts refers to the back of the weld) to fix the parts as completely as possible, thereby reducing the welding deformation of the parts.

[0003] For special-shaped thin-walled parts with complex shapes, conventional tooling usually assembles at least two parts of the separated special-shaped thin-walled parts on the reverse support structure, and uses the clamping structure to clamp the front of the parts. This results in the parts being unable to be removed from the tooling because the welded surface of the parts will have negative angles with the reverse support structure of the conventional welding tooling in multiple directions after welding. The above negative angle refers to the size of the opening formed after the parts are welded to get out of the tooling is smaller than the maximum size of the tooling, which makes it impossible for the tooling to be smoothly removed from the welded parts.

[0004] Therefore, in order to prevent parts from being unable to come off the reverse support structure after welding using conventional welding tooling, only partial welds of the parts to be welded can be supported, and reverse support structures cannot be set for all welds. This also results in the inability to set a corresponding clamping structure on the outside of the weld attachment without a reverse support structure. For some welds that are not equipped with reverse support structures and clamping structures, alignment is achieved by clamping nearby welds. However, the welds after welding will produce a large deformation of the entire weld due to the lack of reverse support structures and clamping structures, which affects the surface accuracy (i.e., contour) of the parts. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a welding jig for special-shaped thin-walled parts, which can fully support all welds and the welded parts can be removed from the welding jig to improve the contour accuracy of the welded parts and ensure the quality of the product.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A welding tool for special-shaped thin-walled parts is provided, comprising:

[0008] A base assembly and a weld support assembly disposed on the base assembly, wherein the weld support assembly includes at least one set of weld support bars mounted on the base assembly, wherein the weld support bars are disposed inside the part to be welded, wherein the length of the weld support bars extends along the weld of the part, wherein the shape of the weld support bars is the same as that of the weld, and wherein the weld support bars are configured to support the vicinity of both sides of all welds of the part;

[0009] The weld support bar can rotate relative to the base assembly, the projection of the weld on the horizontal plane gradually approaches the inner side of the port from the port of the part, and the weld support bar can rotate relative to the weld so that the welded part can be removed from the weld support assembly from the port;

[0010] The weld seam pressing assembly is arranged outside the part and is configured to press against the outer wall of the vicinity of the weld seam.

[0011] Preferably, the welding tool for special-shaped thin-walled parts further comprises:

[0012] A port positioning support assembly, which is arranged on the base assembly and located on one side of the weld support assembly, and the port positioning support assembly can reciprocate in a horizontal plane in a direction close to or away from the port;

[0013] The port positioning support assembly is configured to support the port of the part.

[0014] Preferably, the port positioning support assembly comprises:

[0015] A slide rail is arranged on the base assembly, and the slide rail is arranged in a horizontal plane along a direction perpendicular to a surface of the port;

[0016] A guide plate slidingly cooperates with the slide rail;

[0017] A port support plate is mounted on the guide plate. The port support plate can be pressed against the end of the weld support assembly. The outer contour of the port support plate matches the shape of the port.

[0018] Preferably, the weld support bars are in two groups, and the weld support assembly further comprises:

[0019] An intermediate support member is disposed between the two groups of weld support bars, and is configured to support a portion of the weld adjacent to the weld between the two groups of weld support bars. The intermediate support member and the weld support bars support all welds of the part.

[0020] Preferably, the weld support assembly comprises:

[0021] A first support column, one end of which is slidably connected to the base assembly and the other end of which is connected to the weld support bar;

[0022] A second support column, one end of which is slidably connected to the base assembly, and the other end of which is connected to an end of the weld support bar away from the port;

[0023] The weld support bar can rotate relative to the base assembly along a circle with the same diameter at a preset angle.

[0024] The weld support strip and the intermediate support member are both provided with shielding gas holes along the direction of the weld, the outlets of the shielding gas holes face the weld, and two adjacent shielding gas holes are spaced a first preset distance apart.

[0025] Preferably, the welding tool for special-shaped thin-walled parts further comprises:

[0026] The part bottom pressing assembly is detachably arranged on the base assembly, and the part bottom pressing assembly is configured to press the bottom plane of the part.

[0027] Preferably, the part bottom pressing assembly comprises:

[0028] A pressure plate and a detachable fastener, wherein the detachable fastener passes through the pressure plate and is fastened to the base assembly to press the bottom plane of the part.

[0029] Preferably, the weld pressing assembly comprises:

[0030] A plurality of clamping assemblies are arranged above the weld of the part along the direction of the weld of the part, and a second preset distance is spaced between two adjacent clamping assemblies along the direction of the weld. The clamping assemblies can clamp or loosen the nearby areas on both sides of the weld.

[0031] Preferably, the pressing assembly comprises:

[0032] A column, which is arranged on the base assembly;

[0033] An adjustment plate, which is arranged on the column and has an adjustable relative position and angle with the column;

[0034] An adjusting pressure head assembly is arranged on the adjustment plate, and the adjusting pressure head assembly is arranged in the vicinity of both sides of the weld;

[0035] The regulating pressure head assembly is perpendicular to the vicinity of the weld and can tighten or loosen the vicinity of the weld.

[0036] Compared with the prior art, the present invention has the following beneficial effects: when the welding tool in the present invention is used to weld parts, the weld support bars of the weld support assembly support the vicinity of both sides of all welds of the parts, the length of the weld support bars extends in the direction along the welds of the parts, the shape of the weld support bars is substantially the same as the shape of the welds, the weld support bars are capable of supporting all welds of the parts, and interact with the weld clamping assembly 3 arranged outside the parts to clamp all welds, the clamping force of the weld support bars and the weld clamping assembly 3 on the entire weld is substantially consistent, thereby ensuring that the weld stress of the parts remains substantially uniform after welding, the welds after welding are substantially not deformed, the contour accuracy of the parts is improved, and even if there is a small deformation, after the shaping, the customer's requirements for the accuracy of the parts can still be met, thereby reducing the scrap rate.

[0037] Because the projection of the weld on the horizontal plane gradually approaches the inner side of the port from the port of the part, and the weld support bar can rotate relative to the base assembly, so that the welded part can be detached from the weld support assembly from its own port, thereby ensuring that the weld support assembly can support all the welds of the part, thereby ensuring that the stress of the weld after welding is uniform, the weld after welding will basically not be deformed, thereby improving the contour accuracy of the part and meeting customer needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a welding tool for special-shaped thin-walled parts in the present invention at a first angle;

[0039] Figure 2 It is a structural schematic diagram of a second angle of the welding tool for special-shaped thin-walled parts in the present invention;

[0040] Figure 3 It is a structural schematic diagram of the welding tool for special-shaped thin-walled parts in the present invention from a third angle;

[0041] Figure 4 It is a structural schematic diagram of the weld support assembly and the part bottom clamping assembly at a first angle in the present invention (excluding the intermediate support member 22);

[0042] Figure 5 It is a structural schematic diagram of the weld support assembly and the part bottom clamping assembly at a second angle in the present invention (excluding the intermediate support member 22);

[0043] Figure 6 It is the projection of two welds on the special-shaped thin-walled part in the present invention on the horizontal plane;

[0044] Figure 7 It is the projection of a weld on the special-shaped thin-walled part in the present invention on the horizontal plane;

[0045] Figure 8 It is a structural schematic diagram of a weld support assembly and a part bottom clamping assembly at a first angle in the present invention;

[0046] Fig. 9 It is a structural schematic diagram of a weld support assembly and a part bottom pressing assembly at a second angle in the present invention;

[0047] Fig.10 It is a cross-sectional view of the slider and the arc-shaped sliding groove in the present invention;

[0048] Fig.11 It is the projection of two asymmetric welds on the special-shaped thin-walled parts in the present invention on the horizontal plane;

[0049] Fig.12 It is a structural schematic diagram of a weld clamping assembly and a part bottom clamping assembly at a first angle in the present invention;

[0050] Fig.13 It is a structural schematic diagram of a weld clamping assembly and a part bottom clamping assembly at a second angle in the present invention;

[0051] Fig.14 It is a schematic structural diagram of the port positioning support assembly in the present invention.

[0052] Among them, 1. base;

[0053] 2. Weld support assembly; 21. Weld support bar; 22. Intermediate support member; 23. Mounting plate; 24. Arc-shaped sliding groove; 25. Sliding block; 26. Arc-shaped pressing plate; 27. Protective gas hole; 28. First support column; 29. ​​Second support column; 30. Positioning pin;

[0054] 3. Welding seam clamping assembly; 31. Clamping assembly; 311. Column; 312. Adjusting pressure head assembly; 3121. Adjusting column; 3122. Pressure head; 313. Adjusting plate; 314. First strip hole;

[0055] 4. Port positioning support assembly; 41. Slide rail; 42. Port support plate; 43. Guide plate; 44. Third positioning column; 45. Lead screw; 46. Fixed plate;

[0056] 5. Part bottom clamping assembly; 51. Pressure plate; 52. Removable fastener; 53. Second positioning column. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0060] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0061] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0063] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0064] In the prior art, when forming complex-shaped special-shaped thin-walled parts, the parts are usually divided into at least two structures and formed separately. After assembly, the reverse support structure of the tooling is supported, and the external clamping structure is used to clamp the assembled parts. The welds of the spliced ​​parts are welded through the combined action of the two.

[0065] However, due to the above-mentioned method of fixing parts, due to the complex structure and irregular welds of special-shaped thin-walled parts themselves, the reverse support structure is mostly the main body structure of the supporting parts, and cannot directly support the welds to align the welds between the various parts of the parts, resulting in deformation of the welds after welding, and the quality of the parts after welding cannot meet the accuracy required by customers. If the reverse support structure is used to fully support all weld structures, it will cause the parts after welding to be difficult to disengage from the reverse support structure. Therefore, when designing tooling, the problem of parts disengagement after welding is taken into consideration. Generally, the reverse support assembly can only support part of the weld, and the remaining weld cannot be supported by the reverse support assembly, and cannot be clamped by the clamping assembly. This part of the weld can only rely on nearby supported and clamped welds, or on indirect support methods such as supporting positions without welds to achieve alignment before welding. However, the weld after welding will still be subject to large deformation such as distortion due to factors such as uneven weld stress. Even if the welded parts are subsequently calibrated, due to the large deformation of the weld and the inconsistent deformation positions, the surface accuracy (i.e., contour) of the shaped parts will still be difficult to meet the customer's accuracy requirements, the product quality is difficult to guarantee, and the scrap rate is high.

[0066] In order to solve the above problems, the utility model provides a welding tool for special-shaped thin-walled parts, which are mainly used in the aviation field, such as combustion chambers and exhaust nozzles in aircraft engines. Figure 1-Figure 5 As shown, Figure 1 This is a schematic diagram of the structure of the welding tooling for special-shaped thin-walled parts from the first angle. Figure 2 This is a schematic diagram of the structure of the second angle of the welding tooling for special-shaped thin-walled parts. Figure 3 This is a schematic diagram of the structure of the welding tooling for special-shaped thin-walled parts from the third angle. Figure 4 It is a structural schematic diagram of the weld support assembly and the part bottom clamping assembly at a first angle (excluding the intermediate support member 22). Figure 5 It is a schematic structural diagram of the weld support assembly and the part bottom clamping assembly at a second angle (excluding the intermediate support member 22).

[0067] The above-mentioned welding tooling for special-shaped thin-walled parts includes a base assembly, a weld support assembly 2 arranged on the base assembly, and a weld clamping assembly 3, wherein the weld support assembly 2 includes at least one group of weld support bars 21 installed on the base assembly, the weld support bars 21 are arranged inside the part to be welded, the length of the weld support bars 21 extends along the weld of the part, the shape of the weld support bars 21 is the same as the shape of the weld, and the weld support bars 21 are configured to support the vicinity of both sides of all welds of the part.

[0068] The weld support bar 21 can rotate relative to the base assembly, and the projection of the weld on the horizontal plane gradually approaches the inner side of the port from the port of the part. The weld support bar 21 can rotate relative to the weld so that the welded part can be removed from the weld support assembly 2 from the port.

[0069] The weld seam pressing assembly 3 is disposed outside the component and is configured to press against the outer wall of the vicinity of the weld seam.

[0070] When welding parts, the welding tool in this embodiment uses the weld support bar 21 of the weld support assembly 2 to support the vicinity of both sides of all welds of the parts. The vicinity here refers to the positions on both sides of the welds within a certain area to ensure that the welds can be stably supported. When welding the welds, the weld support assembly 2 will not interfere with the position of the welds. The above-mentioned certain area is determined based on factors such as the size of the parts and the size of the welds to ensure that it can cooperate with the weld clamping assembly 3 to clamp the welds.

[0071] Preferably, the weld support bar 21 is in contact with and in fit with the inner wall of the weld of the part. Here, the weld support bar 21 is in fit with the inner wall of the weld of the part means that the weld support bar 21 is basically in a completely fitted state when supporting the part, so as to better support the weld.

[0072] The length extension direction of the weld support bar 21 extends along the weld of the part, and the shape of the weld support bar 21 is the same as the shape of the weld. The weld support bar 21 can support the vicinity of all welds of the part, and the weld support bar 21 interacts with the weld clamping assembly 3 arranged outside the part to clamp all welds.

[0073] The clamping force of the weld support bar 21 and the weld clamping assembly 3 on the entire weld is basically consistent, thereby ensuring that the weld stress of the part remains basically uniform after welding, and the weld after welding will basically not deform, thereby improving the accuracy of the part's contour. Even if there is a small deformation, after shaping, it can still meet the customer's requirements for part accuracy and reduce the scrap rate.

[0074] In addition, since the projection of the weld on the horizontal plane gradually approaches the inner side of the port from the port of the part, and the weld support bar 21 can rotate relative to the base assembly, the position of the weld support bar 21 is adjusted and the movement and rotation of the coordinated parts are ensured to ensure that the welded parts and the tooling will not produce "negative angle" interference, so that the welded parts can be detached from the weld support assembly 2 from their own ports.

[0075] In the above embodiment, providing at least one set of weld support bars 21 enables the welding tool to weld special-shaped thin-walled parts with only one weld and special-shaped thin-walled parts with two welds, thereby increasing the application scope of the welding tool to adapt to the welding of special-shaped thin-walled parts with different numbers of welds and reduce costs.

[0076] The shape of the weld support bar 21 in this embodiment is determined according to the shape of the weld of the part, and the shape of the weld support bar 21 is "horn-shaped".

[0077] like Figure 6 and Figure 7 As shown, Figure 6 is the projection of two welds on a special-shaped thin-walled part on the horizontal plane. Figure 7 It is the projection of a weld on a special-shaped thin-walled part on the horizontal plane.

[0078] In this embodiment, the above-mentioned welding tool is suitable for welds where the projection of the weld on the horizontal plane gradually approaches the inner side of the port from the port, that is, when there are two welds, the direction of the projection of the weld on the horizontal plane gradually moves from the weld at the port to the middle of the two welds. After welding, the weld support bar 21 is rotated relative to the base assembly so that the weld will not produce a negative angle with the tool, so that the welded parts can be smoothly removed from the port.

[0079] If there is only one weld on the part, the direction of the projection of the weld on the horizontal plane gradually approaches the inner side of the part from the end.

[0080] In other embodiments, the shape of the weld may be other shapes.

[0081] Regarding the specific structure of the weld support assembly 2, as shown in FIG. Figure 8 and Fig. 9 As shown, Figure 8 It is a structural schematic diagram of the weld support component 2 and the part bottom clamping component 5 at a first angle, Fig. 9 It is a structural schematic diagram of the weld support assembly 2 and the part bottom clamping assembly 5 at a second angle. The above-mentioned weld support bars 21 are two groups. The weld support assembly 2 also includes an intermediate support member 22, which is arranged between the two groups of weld support bars 21. The intermediate support member 22 is configured to support the vicinity of the partial weld located between the two groups of weld support bars 21. The intermediate support member 22 and the weld support bars 21 support all welds of the part.

[0082] In this embodiment, the weld support bars 21 are provided in two groups, so as to support the welding of the special-shaped thin-walled parts with two welds. The intermediate support member 22 is provided between the two groups of weld support bars 21. When the two welds are close to the middle of the two welds at the tail, as shown in FIG. Figure 7 As shown, the tail here is described based on the port, and the port is the front end. The two weld support bars 21 are not suitable for supporting the welds at the merging point, so the middle support member 22 is used to support the welds between the two sets of weld support bars 21 and at the merging point, and the three cooperate to support all welds.

[0083] More preferably, if Figure 8 and 9 As shown, the two groups of weld support bars 21 are symmetrically arranged, the middle support member 22 is arranged between the two groups of weld support bars 21, and there is a smooth transition between the middle support member 22 and the weld support bars 21 on both sides. The welding tool in this embodiment is suitable for two symmetrically arranged welds.

[0084] Further preferably, the weld support assembly 2 includes a first support column 28 and a second support column 29, wherein one end of the first support column 28 is slidably connected to the base assembly, and the other end is connected to the weld support bar 21; one end of the second support column 28 is slidably connected to the base assembly, and the other end is connected to an end of the weld support bar 21 away from the port; the weld support bar 21 can rotate at a preset angle relative to the base assembly along a circle of the same diameter.

[0085] The above-mentioned weld support bar 21 can be rotated at a preset angle along a circle of the same diameter relative to the base assembly, so that when the welded parts are removed from the weld support assembly 2, the positions of the parts and the weld support bar 21 can be adjusted, such as lifting the parts upwards, tilting the parts, or rotating the parts, etc., and at the same time rotating the weld support bar 21 relative to the base assembly, so that the positions of the parts and the weld support bar 21 no longer interfere with each other and can be removed smoothly.

[0086] The position of the weld support bar 21 can be rotated relative to the base assembly, and two welds asymmetrically arranged on a special-shaped thin-walled part can be welded to save the manufacturing cost of tooling and reduce production costs. At the same time, the two sets of weld support bars 21 can also be fine-tuned to adapt to the supporting parts.

[0087] Preferably, a positioning pin 30 is also provided on the weld support bar 21 or the intermediate support member 22. The positioning pin 30 is arranged between the weld support bar 21 and the intermediate support member 22. When the weld support bars 21 and the intermediate support member 22 on both sides are combined, the three can be quickly aligned.

[0088] Specifically, Figure 8-Figure 10 As shown, Fig.10 It is a cross-sectional view of the slider and the arc-shaped sliding groove. The base assembly includes a base 1 and a mounting plate 23, wherein the mounting plate 23 is arranged on the base 1, the bottom of the weld support bar 21 is connected to the mounting plate 23, the mounting plate 23 is installed on the base 1, a circular arc-shaped sliding groove 24 is arranged on the mounting plate 23, a slider 25 is arranged in the circular arc-shaped sliding groove 24, the weld support bar 21 is connected to the slider 25 via the first support column 28, the slider 25 slides in the circular arc-shaped sliding groove 24, and can be fixed at any position of the circular arc-shaped sliding groove 24. The weld support bar 21 slides along the circular arc-shaped sliding groove 24 using the slider 25, so that the welding tool can weld special-shaped thin-walled parts with two welds.

[0089] The weld here can be asymmetrical, e.g. Fig.11 The weld shown in Fig.11 It is the projection of two asymmetric welds on a special-shaped thin-walled part on the horizontal plane.

[0090] In addition, by adjusting the position of the slider 25 in the arc-shaped sliding groove 24, the position of the weld support bar 21 can be fine-tuned to better support the weld. The slider 25 can be fixed at any position of the arc-shaped sliding groove 24 to keep the position of the weld support bar 21 stationary, thereby ensuring that the weld position will not change during the welding process, thereby ensuring the quality of the weld.

[0091] Regarding the specific structure in which the weld support bar 21 is connected to the slider 25 via the first support column 28, specifically, one end of the first support column 28 is connected to the weld support bar 21, and the other end is connected to the slider. The first support column 28 is located in the middle position of the weld support bar 21. The middle position here refers to any position in the length direction of the weld support bar 21, not the position of half of the length direction of the weld support bar 21.

[0092] A second support column 29 is disposed at one end of the weld support bar 21 away from the port. One end of the second support column 29 is connected to the weld support bar 21 , and the other end is connected to the slider 25 .

[0093] More specifically, with respect to the specific structure of the above-mentioned arc-shaped sliding groove 24, a sliding groove is opened on the mounting plate 23, and two arc-shaped pressure plates 26 with the same shape as the sliding groove are arranged above the sliding groove. The sliding groove and the arc-shaped pressure plates 26 form an arc-shaped sliding groove 24, and the arc-shaped pressure plates 26 are arranged to prevent the slider 25 from escaping from the sliding groove.

[0094] The slider 25 is a T-shaped slider, and the bottom of the weld support bar 21 is connected to the T-shaped slider. The T-shaped slider slides in the sliding groove. When the weld support bar 21 is adjusted to a predetermined position, the arc-shaped pressing plate 26 presses the T-shaped slider to fix the T-shaped slider in the sliding groove. The arc-shaped pressing plate 26 forms a T-shaped groove with the mounting plate 23, and the arc-shaped pressing plate 26 and the mounting plate 23 are fastened to realize that the T-shaped slider 25 can stay at any position in the sliding groove.

[0095] In other embodiments, the specific structure of the above-mentioned arc-shaped sliding groove 24 can also be that a sliding groove is opened on the mounting plate 23, the T-shaped slider slides in the sliding groove, and the above-mentioned arc-shaped pressure plate 26 is only arranged above the T-shaped slider 25. As the T-shaped slider moves in the sliding groove, the arc-shaped pressure plate 26 moves together. When the T-shaped slider is adjusted into place, the fastening effect of the arc-shaped pressure plate 26 and the mounting plate 23 is utilized to press the T-shaped slider 25 to prevent the position of the weld support bar 21 from changing.

[0096] More specifically, with respect to the specific structure of the mounting plate 23, the mounting plate 23 is circular, and the specific structure of the mounting plate 23 is adjusted according to the specific structure of the special-shaped thin-walled parts. In addition, the outer peripheral side wall of the mounting plate 23 can press against the inner wall of the part near the bottom, thereby preventing the deformation of the part due to insufficient support strength of the bottom of the part during the welding process of large-sized special-shaped thin-walled parts, and ensuring that the position of the part is more stable and less likely to move when positioning and welding the part.

[0097] Preferably, a first positioning column is also provided on the side wall of the mounting plate 23, and a first positioning hole is correspondingly provided on the side wall of the part in contact with the side wall of the mounting plate 23, so as to facilitate rapid positioning and assembly of various parts of the special-shaped thin-walled parts when welding the parts.

[0098] Preferably, if Fig.12 and Fig.13 As shown, Fig.12 This is a schematic diagram of the structure of the weld clamping assembly and the part bottom clamping assembly at the first angle. Fig.13 This is a schematic structural diagram of the second angle of the weld clamping assembly and the part bottom clamping assembly.

[0099] Shielding gas holes 27 are provided on the weld support bar 21 and the intermediate support member 22 along the direction of the weld. The outlets of the shielding gas holes 27 face the weld, and two adjacent shielding gas holes 27 are spaced apart by a first preset distance.

[0100] In the above embodiment, shielding gas holes 27 are arranged on the two groups of weld support bars 21 along the length direction of the weld support bars 21. The shielding gas holes 27 are opposite to the position of the weld. During welding, external shielding gas is sprayed out through the shielding gas holes 27 to form a shielding gas range at all welds. During welding, defects such as pores in the weld after welding due to air factors are prevented, which affects the strength of the weld.

[0101] The shielding gas holes 27 are evenly distributed along the extension direction of the weld support bar 21, and the first preset distance between two adjacent shielding gas holes 27 is the same, so as to ensure that a uniform shielding gas range is formed at the weld during welding.

[0102] In other embodiments, the above-mentioned intermediate support member 21 can also include a first support member and a second support member, wherein the first support member is connected to the weld support bar 21 on one side thereof, and the second support member is connected to the weld support bar 21 on one side thereof, and the first support member and the second support member move synchronously with the weld support bars 21 connected to them respectively, and when the two welds merge at the middle position, the first support member and the second support member merge, and the first support member and the second support member are sealed to facilitate the internal gas to pass to the protective gas holes 27.

[0103] The first support member and the second support member can be symmetrically arranged structures, and the two can also be arranged differently according to the shape of the weld.

[0104] In other embodiments, the first support frame and the second support member are integrally arranged with the second support column on the same side thereof.

[0105] The specific structure of the weld pressing assembly 3 is as follows: Figure 12-13As shown, as shown, preferably, the weld clamping assembly 3 includes a plurality of clamping assemblies 31, and the clamping assembly 31 is arranged above the weld of the part along the direction of the weld of the part, and a second preset distance is spaced between two adjacent clamping assemblies 31 along the direction of the weld, and the clamping assembly 31 can clamp or loosen the nearby areas on both sides of the weld.

[0106] In this embodiment, the weld clamping assembly 3 is arranged on the outside of the part. After the weld support assembly 2 supports the part, the clamping assembly 31 is pressed on the outside of the part. The clamping assembly 31 and the weld support assembly 2 work together to achieve the clamping of all welds.

[0107] A plurality of clamping assemblies 31 are arranged along the direction of the weld, and a second preset distance is provided between two adjacent groups of clamping assemblies 31. The distance between two adjacent groups of clamping assemblies 31 can be the same or different, and is specifically determined according to factors such as the position of the weld and the degree of curvature of the weld to ensure that the weld can be clamped evenly.

[0108] A plurality of clamping assemblies 31 are provided to ensure that all welds can be clamped, the weld deformation after welding is small, the shaping process is reduced, the work efficiency is improved, and at the same time, the contour accuracy of the welded parts is improved to meet customer needs. Moreover, under the premise of ensuring that all welds are clamped, the structure of the clamping assembly 31 can be simplified to the greatest extent. After the parts are welded, the clamping assembly 31 can be easily removed so that the welded parts can be smoothly removed from the weld support assembly 2.

[0109] Regarding the specific structure of the pressing assembly 31, Figure 12-13 As shown, in this embodiment, the clamping assembly 31 includes a column 311, an adjustment plate 313 and an adjusting pressure head assembly 312, wherein the column 311 is arranged on the base assembly, the adjustment plate 313 is arranged on the column 311, and the relative position and angle between the column 311 and the adjusting pressure head assembly 312 are adjustable, so that the adjusting pressure head assembly 312 connected to the column 311 is perpendicular to the vicinity of the weld, the adjusting pressure head assembly 312 is arranged on the adjustment plate 313, and the vicinity of both sides of the weld are provided with the adjusting pressure head assembly 312; the adjusting pressure head assembly 312 is perpendicular to the vicinity of the weld, and can tighten or loosen the vicinity of the weld.

[0110] Because the parts to be welded are special-shaped thin-walled parts, the surface of the parts is partially curved. In order to facilitate the clamping assembly 31 to clamp the parts, the clamping assembly 31 needs to be adaptively adjusted. Therefore, the installation angle and installation position of the column 311 and the adjustment plate 313 provided in each set of the clamping assembly 31 are adaptively adjusted so that the adjustment pressure head assembly 312 can be perpendicular to the vicinity of the weld at the location, thereby clamping the parts. In order to achieve local adjustment of each set of the clamping assembly 31 in the clamped area, the height of the adjustment pressure head assembly 312 and the surface of the part where it is located is adjustable, so that the adjustment pressure head 3122 can adapt to the curved surface of the part where it is located.

[0111] Specifically, in the above embodiment, the heights of the columns 311 in each group of the clamping assembly 31 can be the same or different, and their heights are determined according to the positions of the welds where they are located. In addition, there are two groups of adjusting pressure head assemblies 312 installed on each adjustment plate 313 to clamp the nearby areas on both sides of the weld.

[0112] More specifically, the adjusting pressure head assembly 312 includes an adjusting column 3121 and a pressure head 3122 installed at the end of the adjusting column 3121. The adjusting column 3121 is perpendicular to the vicinity of the weld. The adjusting column 3121 is threadedly connected to the adjusting plate 313. The pressure head 3122 and the adjusting column 313 are ball-connected. The pressure head 3122 can adjust the angle relative to the adjusting column 313. The adjusting column 3121 is threadedly connected to the adjusting plate 313. The adjusting column 3121 is rotated to adjust the distance between the pressure head 3122 and the vicinity of the weld, thereby pressing the parts.

[0113] Preferably, the pressing head 3122 is made of any material selected from the group consisting of polyurethane, rubber, and silicone to prevent the pressing head 3122 from damaging the surface of the part during the pressing process.

[0114] Further preferably, a first strip hole 314 is provided on the adjustment plate 313 or the column 311, and the relative position of the adjustment plate 313 and the column 311 is adjusted by utilizing the first strip hole 314. The length direction of the first strip hole 314 is arranged along the vertical direction of the weld where it is pressed, so that the adjustment plate 313 can adjust the position of the regulating pressure head 3122 on both sides of the weld.

[0115] like Figure 1-Figure 3 As shown, the welding tool for special-shaped thin-walled parts further includes a part bottom clamping assembly 5 detachably arranged on the base assembly, and the part bottom clamping assembly 5 is configured to clamp the bottom plane of the part.

[0116] The bottom of the special-shaped thin-walled part is provided with a plane or a flange surface, and the bottom clamping assembly 5 of the part is used to partially fix the part. When the size of the part is large, local fixation is used to further ensure that the part will not produce local warping due to the above-mentioned weld clamping assembly 3, making the overall structure of the part more stable.

[0117] like Figure 4 and Figure 5 , Figure 8 and Fig. 9 As shown, the part bottom pressing assembly 5 includes a pressing plate 51 and a detachable fastener 52. The detachable fastener 52 passes through the pressing plate 51 and is fastened to the base assembly to press the plane at the bottom of the part. The pressing plate 51 is pressed on the plane, and the pressing plate 51 and the mounting plate 23 press the local structure (i.e., the plane) of the part. The detachable fastener 52 fastens the pressing plate 51 on the mounting plate 23 on the base assembly, which is convenient for disassembly of the pressing plate 51 and for detachment of the part after welding.

[0118] Preferably, a second positioning column 53 is also provided on the mounting plate 23 to position the plane of the bottom of the part.

[0119] like Figure 1-Figure 3 As shown, the above-mentioned welding tooling for special-shaped thin-walled parts also includes a port positioning support assembly 4 arranged on the base assembly, the port positioning support assembly 4 is arranged on one side of the weld support assembly 2, the port positioning support assembly 4 can reciprocate in the horizontal plane in the direction approaching or away from the port, and the port positioning support assembly 4 is configured to support the port of the part.

[0120] The port positioning support assembly 4 is used to support the port of the part to ensure the stability of the part during welding, and to avoid the distortion of the port position of the part due to the thin-walled product after the weld clamping assembly 3 clamps the part, which affects the welding quality. Especially for parts with larger sizes, the port size of the part is larger. Under the interaction of the weld support assembly 2, the weld clamping assembly 3 and the bottom clamping assembly 5 on the part, in order to prevent warping and distortion at the port position, the port positioning support assembly 4 is used to support the port, so as to completely fix the part, prevent the part from deformation, and improve the accuracy of the contour of the part after welding.

[0121] In order to facilitate the smooth removal of the parts after welding, the above-mentioned port positioning support assembly 4 can reciprocate in the horizontal plane in the direction close to or away from the port. The port positioning support assembly 4 can be away from the parts to avoid interference when the parts are removed from the weld support assembly 2.

[0122] Preferably, the port support assembly 4 can be pressed against the end of the weld support assembly 2 to ensure that the port support assembly 2 can support the parts more stably and enhance the overall structural strength of the welding tooling.

[0123] like Fig.14 As shown, Fig.14 Schematic diagram of the structure of the port positioning support assembly, the port positioning support assembly 4 comprises a slide rail 41 arranged on the base assembly, the slide rail 41 is arranged perpendicular to the direction of the port on the horizontal plane, and a guide plate 43 sliding with the slide rail 41, and a port support plate 42 mounted on the guide plate 43, the port support plate 42 can be pressed against the end of the weld support assembly 2, and the outer contour of the port support plate 42 matches the shape of the port. Matching here means that the outer contour of the port support plate 42 is the same as the shape of the port, and the port support plate 42 contacts the inner wall of the port.

[0124] Preferably, a third positioning column 44 is provided on the side wall of the port support plate 42, and a second positioning hole is correspondingly provided on the port to position the port, thereby ensuring the accurate position of the port. When the size of the part is large, it is not possible to ensure that the position of the part is completely correct by only relying on the first positioning column to position the part, and the weld position of the assembled product is completely aligned. The third positioning column 44 is provided, and positioning is provided at both ends of the part to ensure the accuracy of the part after assembly. At the same time, the first positioning column, the second positioning column 53 and the third positioning column 44 are provided for positioning, which can also quickly assemble and position the parts and improve work efficiency.

[0125] Preferably, a fixing plate 46 is provided on the base assembly, one end of the lead screw 45 is connected to the guide plate 43 , the lead screw 45 is threadedly connected to the fixing plate 46 , and the threaded transmission of the lead screw 45 drives the guide plate 43 to reciprocate along the slide rail 41 .

[0126] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A welding tool for special-shaped thin-walled parts, characterized in that: include: A base assembly and a weld support assembly (2) arranged on the base assembly, the weld support assembly (2) comprising at least one set of weld support bars (21) mounted on the base assembly, the weld support bars (21) being arranged inside a part to be welded, the length of the weld support bars (21) extending in a direction along the weld of the part, the shape of the weld support bars (21) being the same as the shape of the weld, and the weld support bars (21) being configured to support the vicinity of both sides of all welds of the part; The weld support bar (21) can rotate relative to the base assembly, the projection of the weld on the horizontal plane gradually approaches the inner side of the port from the port of the part, and the weld support bar (21) can rotate relative to the weld so that the welded part can be removed from the weld support assembly (2) from the port. A weld pressing assembly (3), which is arranged outside the part and is configured to press against an outer wall of a vicinity of the weld; The welding tool for special-shaped thin-walled parts also includes: A port positioning support assembly (4), which is arranged on the base assembly and located on one side of the weld support assembly (2), and the port positioning support assembly (4) is capable of reciprocating in a horizontal plane in a direction approaching or moving away from the port; The port positioning support assembly (4) is configured to support the port of the part; The port positioning support assembly (4) comprises: A slide rail (41) is arranged on the base assembly, and the slide rail (41) is arranged in a horizontal plane along a direction perpendicular to a surface of the port; A guide plate (43) slidingly cooperates with the slide rail (41); A port support plate (42) mounted on the guide plate (43), the port support plate (42) being capable of pressing against the end of the weld support assembly (2), and the outer contour of the port support plate (42) matching the shape of the port; The weld support bars (21) are in two groups, and the weld support assembly (2) further comprises: An intermediate support member (22) is disposed between the two groups of weld support bars (21), the intermediate support member (22) being configured to support a portion of the weld seam located between the two groups of weld support bars (21), the intermediate support member (22) and the weld support bars (21) supporting all weld seams of the part; The weld support assembly (2) comprises: A first support column (28), one end of which is slidably connected to the base assembly and the other end of which is connected to the weld support bar (21); A second support column (29), one end of which is slidably connected to the base assembly, and the other end of which is connected to an end of the weld support bar (21) away from the port; The weld support bar (21) can rotate at a preset angle relative to the base assembly along a circle of the same diameter; The weld support strip (21) and the intermediate support member (22) are both provided with shielding gas holes (27) along the direction of the weld, the outlets of the shielding gas holes (27) face the weld, and two adjacent shielding gas holes (27) are spaced apart by a first preset distance.

2. The welding tool for special-shaped thin-walled parts according to claim 1 is characterized in that: The welding tool for special-shaped thin-walled parts also includes: A component bottom pressing assembly (5) is detachably arranged on the base assembly, and the component bottom pressing assembly (5) is configured to press the bottom plane of the component.

3. The welding tool for special-shaped thin-walled parts according to claim 2, characterized in that: The part bottom pressing assembly (5) comprises: A pressure plate (51) and a detachable fastener (52), wherein the detachable fastener (52) passes through the pressure plate (51) and is fastened to the base assembly to press the bottom plane of the part.

4. The welding tool for special-shaped thin-walled parts according to claim 1, characterized in that: The weld pressing assembly (3) comprises: A plurality of clamping assemblies (31) are arranged above the weld of the part along the direction of the weld of the part, and a second preset distance is spaced between two adjacent clamping assemblies (31) along the direction of the weld. The clamping assemblies (31) are capable of clamping or loosening the vicinity of the two sides of the weld.

5. The welding tool for special-shaped thin-walled parts according to claim 4, characterized in that: The pressing assembly (31) comprises: A column (311) disposed on the base assembly; An adjustment plate (313), which is disposed on the column (311) and has an adjustable relative position and angle with the column (311); An adjusting pressure head assembly (312) is arranged on the adjustment plate (313), and the adjusting pressure head assembly (312) is arranged in the vicinity of both sides of the weld; The regulating pressure head assembly (312) is perpendicular to the vicinity of the weld and is capable of tightening or loosening the vicinity of the weld.

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