Device for positioning and welding flange with hole on large rectangular pipe

Abstract

The invention relates to the technical field of machining, and provides a device for positioning and welding a flange with a hole through a large rectangular pipe, the device comprises a platform, a left-right adjusting assembly and a connecting seat assembly, the platform comprises a base and two guide rails, the two guide rails are symmetrically arranged on the base in parallel, and the left-right adjusting assembly comprises a first adjusting screw rod, a fixing block and a bearing flat plate; the fixing block is fixed to the guide rail, the first adjusting screw penetrates through the bearing flat plate and is in threaded connection with the fixing block, the first adjusting screw is matched with a thread pair of the fixing block to achieve left-right movement of the left-right adjusting assembly, the connecting base assembly comprises a sliding block, and the sliding block is in sliding fit with the guide rail to achieve sliding adjustment of the connecting base assembly. The left-right movement of the left-right adjusting assembly and the sliding adjustment of the connecting base assembly jointly achieve the adjustment of the transverse and longitudinal positions of the rectangular pipe. Accurate alignment and stable fixation of the rectangular pipe and the flange can be achieved, and the welding precision and the operation efficiency are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a device for positioning and welding perforated flanges on large rectangular tubes. Background Technology

[0002] With the widespread application of large steel structures in bridges, buildings, and ships, welded connections between large rectangular tubes and perforated flanges have become a common structural form. The precision of such welded structures directly affects the overall assembly quality and service safety, especially the relative positional accuracy of the flange holes at both ends, which is crucial to the smooth progress of subsequent assembly.

[0003] Currently, in the welding process of large rectangular tubes (such as those with a cross-section exceeding 600mm×400mm, a length exceeding 11m, and a weight exceeding 1700kg) to flanges with holes at both ends, the large span and cross-sectional dimensions of the pipe fittings often lead to material distortion, bending, and other deformation problems, making it impossible to simply rely on the edges of the rectangular tube for positioning. If the flanges have holes, the relative dimensional tolerances of the flange holes at both ends are prone to occur after welding. Furthermore, due to the large weight and volume of the pipe fittings, adjusting the positioning during welding is extremely inconvenient, and the weight and support position can easily cause additional deformation along the length. To ensure the accuracy of the flange hole positions after welding, the commonly used method is to first weld the flanges to the rectangular tube as a whole, and then place it on large machining equipment for secondary processing of the flange holes at both ends. This method is not only cumbersome and time-consuming, but also relies on large and expensive equipment, resulting in a significant increase in production costs.

[0004] Chinese patent CN215967148U discloses a welding fixture for the main cylinder support assembly of an intelligent concrete pump truck. This device, through a positioning seat with fixing components that works in conjunction with a guide rail, positions and clamps the perforated lateral support plates at both ends of a rectangular tube, solving the problem of ensuring the concentricity of multiple holes on the support plates during welding. However, this device may struggle to effectively compensate for installation deviations caused by the tube's own weight and deformation when dealing with large, heavy rectangular tubes. Furthermore, its positioning method may still rely on post-weld secondary machining to ensure final hole accuracy, making the process cumbersome and highly dependent on large processing equipment.

[0005] Therefore, how to provide a positioning welding device that can directly and accurately adjust and fix the relative position of a large rectangular tube and a perforated flange during the welding process, effectively compensate for material deformation, ensure the accuracy of the flange hole positions at both ends after welding, and thus eliminate the need for subsequent machining processes, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In view of this, in order to overcome the shortcomings of the prior art, the present invention aims to provide a device for positioning and welding perforated flanges on large rectangular tubes.

[0007] This invention provides a device for positioning and welding perforated flanges on large rectangular tubes. The device includes a platform, a left-right adjustment assembly, and a connecting seat assembly. The platform includes a base and two guide rails, which are arranged parallel and symmetrically on the base. The left-right adjustment assembly includes a first adjusting screw, a fixing block, and a bearing plate. The fixing block is fixed to the guide rails. The first adjusting screw passes through the bearing plate and is threadedly connected to the fixing block. The threaded engagement between the first adjusting screw and the fixing block enables the left-right movement of the left-right adjustment assembly. The connecting seat assembly includes a slider, which slides with the guide rails to achieve slidable adjustment. The left-right movement of the left-right adjustment assembly and the sliding adjustment of the connecting seat assembly together achieve the adjustment of the lateral and longitudinal positions of the rectangular tube.

[0008] Optionally, in the device for positioning and welding perforated flanges of large rectangular tubes of the present invention, the left and right adjustment components further include multiple cam bearings, which are symmetrically installed on the side of the bearing plate and in contact with the guide rail.

[0009] Optionally, in the device for positioning and welding perforated flanges of large rectangular tubes of the present invention, the left and right adjustment components further include jacks, which are mounted on a bearing plate.

[0010] Optionally, in the device for positioning and welding perforated flanges of large rectangular tubes of the present invention, the connecting seat assembly further includes a vertical plate with multiple holes.

[0011] Optionally, in the device for positioning and welding perforated flanges of large rectangular tubes of the present invention, the connecting seat assembly further includes a base plate and a reinforcing rib, the vertical plate is connected to the base plate, the reinforcing rib is connected between the vertical plate and the base plate, and the slider is installed at the bottom of the base plate.

[0012] Optionally, in the device for positioning and welding perforated flanges of large rectangular tubes of the present invention, the connecting seat assembly further includes a brake screw, which is disposed on the base plate and its end can contact the guide rail.

[0013] Optionally, in the device for positioning and welding perforated flanges of large rectangular tubes of the present invention, the device further includes a right-angle straightedge, which is disposed on the base plate of the connecting seat assembly.

[0014] Optionally, the device for positioning and welding perforated flanges of large rectangular tubes of the present invention further includes a positioning component, which includes a second positioning frame and a threaded reinforcing plate. The second positioning frame is provided with a plurality of threaded holes in an array, and the threaded reinforcing plate is disposed inside the second positioning frame.

[0015] Optionally, in the device for positioning and welding perforated flanges of large rectangular tubes of the present invention, the positioning component further includes two bases and a first positioning frame, the two bases being respectively connected to the two ends of the first positioning frame, and the bases being fixed on the base.

[0016] Optionally, in the device for positioning and welding perforated flanges of large rectangular tubes of the present invention, the positioning component further includes a plurality of second adjusting screws, which are threadedly connected to threaded holes on the second positioning frame.

[0017] The device for positioning and welding perforated flanges on large rectangular tubes according to the present invention has the following beneficial technical effects: 1. It can effectively overcome the twisting and bending deformation of large rectangular tubes and achieve precise spatial alignment of the perforated flange before welding.

[0018] 2. Ensure the relative dimensional accuracy of the flange holes at both ends after welding to meet the requirements of subsequent assembly, thereby completely eliminating the tedious process of subsequent secondary machining.

[0019] 3. It has good versatility and adaptability, and can quickly meet the welding needs of rectangular tubes of different specifications and flanges of different hole types.

[0020] 4. The entire positioning and adjustment process is simple, stable, and reliable, significantly reducing labor intensity and reliance on operational skills, while ensuring the stability of the welding process and the quality of the final product. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments 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.

[0022] Figure 1 This is a structural example diagram of a device for positioning and welding perforated flanges on a large rectangular tube according to an embodiment of the present invention; Figure 2 This is another structural example diagram of a device for positioning and welding perforated flanges on a large rectangular tube according to an embodiment of the present invention; Figure 3 This is an example diagram of the left and right adjustment component structure according to an embodiment of the present invention; Figure 4 This is another structural example diagram of the left-right adjustment component according to an embodiment of the present invention; Figure 5 This is a first partial example diagram of an apparatus for positioning and welding perforated flanges on a large rectangular tube according to an embodiment of the present invention; Figure 6 This is an example diagram of the connector assembly structure according to an embodiment of the present invention; Figure 7 This is another structural example diagram of the connector assembly according to an embodiment of the present invention; Figure 8This is a second partial example diagram of an apparatus for positioning and welding a perforated flange on a large rectangular tube according to an embodiment of the present invention; Figure 9 This is an example diagram of the positioning component structure according to an embodiment of the present invention; Figure 10 This is an example diagram illustrating the application of a device for positioning and welding a perforated flange on a large rectangular tube according to an embodiment of the present invention. In the diagram, 1-platform, 2-left and right adjustment assembly, 3-connecting seat assembly, 4-positioning assembly, 5-right angle ruler, 11-base, 12-guide rail, 21-bearing plate, 22-jack, 23-cam bearing, 24-baffle, 25-first adjusting screw, 26-fixing block, 31-vertical plate, 32-base plate, 33-reinforcing rib, 34-slider, 35-brake screw, 41-base, 42-first positioning frame, 43-second positioning frame, 44-second adjusting screw, 45-threaded reinforcing plate, 311-hole, 431-threaded hole. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Figure 1 This is a structural example diagram of a device for positioning and welding perforated flanges on large rectangular tubes according to an embodiment of the present invention. Figure 2 This is another structural example diagram of an apparatus for positioning and welding perforated flanges on a large rectangular tube according to an embodiment of the present invention, as shown below. Figure 1 , Figure 2As shown, in this embodiment, a device for positioning and welding perforated flanges on large rectangular tubes includes a platform 1, a left-right adjustment assembly 2, a connecting seat assembly 3, a positioning assembly 4, and a right-angle ruler 5. The left-right adjustment assembly 2 is mounted on the platform 1. The connecting seat assembly 3 is slidably connected to the platform 1 and is located on the side of the left-right adjustment assembly 2. The positioning assembly 4 is also fixed to the platform 1 and is located on the other side of the left-right adjustment assembly 2. The right-angle ruler 5 is mounted on the connecting seat assembly 3.

[0027] The left and right adjustment component 2 can move laterally along the platform to adjust the horizontal position of the large rectangular tube. The connecting seat component 3 is used to support and fine-tune the vertical height of the large rectangular tube. The positioning component 4 can clamp and fix the rectangular tube. The right angle ruler 5 is used to assist in the detection and ensure the perpendicularity of the end face of the rectangular tube to the flange to be welded.

[0028] According to an optional example, in this embodiment, the platform 1 includes a base 11 and two guide rails 12, which are arranged parallel to each other on the base 11.

[0029] Figure 3 This is an example diagram of the left and right adjustment component structure according to an embodiment of the present invention. Figure 4 This is another structural example diagram of the left and right adjustment component according to an embodiment of the present invention, such as... Figure 3 Figure 4 As shown, in this embodiment, the left and right adjustment assembly 2 includes a bearing plate 21, two jacks 22, multiple cam bearings 23, two baffles 24, two first adjustment screws 25, and two fixing blocks 26.

[0030] Jack 22 is fixed to the support plate 21 and is used to lift or lower the connecting seat assembly 3. Cam bearings 23 are symmetrically mounted on the sides of the support plate 21 and contact the guide rail 12 to reduce movement friction. Two baffles 24 are symmetrically arranged at both ends of the support plate 21. The first adjusting screw 25 passes through the baffles 24 and the sides of the support plate 21 respectively and cooperates with the fixing block 26.

[0031] Figure 5 This is a first partial example diagram of an apparatus for positioning and welding perforated flanges on a large rectangular tube according to an embodiment of the present invention, as shown below. Figure 5 As shown, in this embodiment, the fixing block 26 is fixedly installed on the guide rail 12 of the platform 1 by bolts, thereby providing a fixed support point. The first adjusting screw 25 is threadedly connected to the bearing plate 21. When the first adjusting screw 25 is rotated, since the fixing block 26 has been tightened, the end of the first adjusting screw 25 will abut against or act on the fixing block 26. Under the transmission of the threaded pair, the rotational motion of the first adjusting screw 25 will be converted into the precise left and right linear motion of the bearing plate 21 and its overall frame along the direction of the guide rail 12, thereby realizing the lateral adjustment of the horizontal position of the large rectangular tube.

[0032] Figure 6 This is an example diagram of the connector assembly structure according to an embodiment of the present invention. Figure 7 This is another structural example diagram of the connector assembly according to an embodiment of the present invention, such as... Figure 6 , Figure 7 As shown, in this embodiment, the connecting seat assembly 3 includes a vertical plate 31, a base plate 32, reinforcing ribs 33, multiple sliders 34, and two brake screws 35. The vertical plate 31 is vertically connected to the base plate 32, forming an L-shaped structure. The reinforcing ribs 33 are welded between the vertical plate 31 and the base plate 32 to increase rigidity. The multiple sliders 34 are mounted on the base plate 32 and cooperate with the guide rails 12 on the platform 1, allowing the connecting seat assembly 3 to move along the platform 1. The two brake screws 35 are symmetrically arranged on the base plate 32 and are used to lock the position after adjustment.

[0033] According to an optional example, in this embodiment, the vertical plate 31 is provided with multiple holes 311. In practical applications, the position and size of the holes 311 can be designed according to actual welding requirements. When the specifications or hole positions of the flange to be welded change, the operator does not need to replace the entire vertical plate 31, but only needs to select the existing holes 311 on the vertical plate 31 that match the current flange for connection and installation. If the preset hole positions cannot meet special requirements, corresponding holes can also be machined on the vertical plate 31 to achieve quick adaptation.

[0034] Figure 8 This is a second partial example diagram of an apparatus for positioning and welding a perforated flange onto a large rectangular tube according to an embodiment of the present invention, as shown below. Figure 8 As shown, in this embodiment, the end of the brake screw 35 contacts the guide rail 12. By tightening the brake screw 35, friction is generated to lock the position of the connecting seat assembly 3. This prevents it from sliding during welding and ensures positioning stability.

[0035] Figure 9 This is an example diagram of the positioning component structure according to an embodiment of the present invention, such as... Figure 9 As shown, in this embodiment, the positioning component 4 includes two bases 41, a first positioning frame 42, two second positioning frames 43, multiple second adjusting screws 44, and two threaded reinforcing plates 45. The two bases 41 are symmetrically connected to both ends of the first positioning frame 42, and the two second positioning frames 43 are symmetrically fixed to the first positioning frame 42. The threaded reinforcing plates 45 are disposed inside the second positioning frames 43. Multiple threaded holes 431 are arrayed on the second positioning frames 43, and the second adjusting screws 44 pass through the threaded holes 431 and the threaded reinforcing plates 45 on the second positioning frames 43.

[0036] It should be noted that in practical applications, the array of multiple threaded holes 431 on the second positioning frame 43 provides multiple optional installation positions for the second adjusting screw 44. The position of the second adjusting screw 44 can be adjusted according to the shape and size of the actual rectangular tube. By rotating the second adjusting screw 44, the depth of its screwing into the threaded hole 431 and the threaded reinforcing plate 45 can be precisely controlled, thereby adjusting the length of the screw end extending inward to adapt to the side wall surface of rectangular tubes of different widths.

[0037] Figure 10 This is an example diagram illustrating the application of a device for positioning and welding perforated flanges on large rectangular tubes according to an embodiment of the present invention. Figures 1 to 10 As shown, the application principle of this device is as follows: The two sets of devices are arranged symmetrically along the length of the large rectangular tube to be welded, ensuring that the guide rails 12 of the two platforms 1 are parallel and collinear, forming a longitudinal foundation reference. The flanges with holes to be welded at both ends are fixedly connected to the corresponding holes 311 on the vertical plates 31 of the connecting seat assemblies 3 on both sides by pins or bolts, so that the spatial relative position of the flanges is preset by the rigid structure of the device.

[0038] The large rectangular tube is hoisted and placed on the bearing plate 21 of the left and right adjustment components 2 on both sides, and supported by the jack 22. During positioning, first loosen the brake screw 35 of the connecting seat assembly 3, and push the entire connecting seat assembly 3 to slide along the guide rail 12 to adjust the front and rear distance between the flange and the end face of the rectangular tube. After adjustment, tighten the brake screw 35 to lock the position.

[0039] Rotating the first adjusting screw 25 of the left-right adjusting component 2 drives the bearing plate 21 and the rectangular tube on it to move laterally along the guide rail 12, achieving centering adjustment in the left and right directions. At the same time, operating the jacks 22 on both sides adjusts the height and level of the two ends of the rectangular tube, and using a right-angle straightedge 5 to monitor and ensure the perpendicularity of the end face of the rectangular tube to the end face of the flange.

[0040] After the position is adjusted, operate the positioning component 4, select the corresponding threaded hole 431 on the second positioning frame 43 according to the width of the rectangular tube, screw in the second adjusting screw 44 so that its end abuts against the side wall of the rectangular tube to complete the clamping and fixing.

[0041] Finally, welding is carried out with all adjustment mechanisms locked and the positioning stable to ensure the accuracy of the relative position of the flange holes at both ends after welding.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for positioning and welding perforated flanges on large rectangular tubes, characterized in that, The device for positioning and welding perforated flanges of large rectangular tubes includes a platform (1), a left and right adjustment assembly (2), and a connecting seat assembly (3). The platform (1) includes a base (11) and two guide rails (12). The two guide rails (12) are arranged parallel and symmetrically on the base (11). The left and right adjustment assembly (2) includes a first adjustment screw (25), a fixing block (26), and a bearing plate (21). The fixing block (26) is fixed on the guide rail (12). The first adjustment screw (25) passes through the bearing plate (21) and is threadedly connected to the fixing block (26). The threaded pair of the first adjustment screw (25) and the fixing block (26) can realize the left and right movement of the left and right adjustment assembly (2). The connecting seat assembly (3) includes a slider (34). The slider (34) slides with the guide rail (12) to realize the sliding adjustment of the connecting seat assembly (3). The left and right movement of the left and right adjustment assembly (2) and the sliding adjustment of the connecting seat assembly (3) together realize the adjustment of the lateral and longitudinal positions of the rectangular tube.

2. The apparatus according to claim 1, characterized in that, The left and right adjustment assembly (2) also includes multiple cam bearings (23), which are symmetrically installed on the side of the bearing plate (21) and in contact with the guide rail (12).

3. The apparatus according to claim 1, characterized in that, The left and right adjustment component (2) also includes a jack (22), which is mounted on the bearing plate (21).

4. The apparatus according to claim 1, characterized in that, The connecting seat assembly (3) also includes a vertical plate (31) with multiple holes (311).

5. The apparatus according to claim 4, characterized in that, The connecting seat assembly (3) also includes a base plate (32) and a reinforcing rib (33). The vertical plate (31) is connected to the base plate (32), the reinforcing rib (33) is connected between the vertical plate (31) and the base plate (32), and the slider (34) is installed at the bottom of the base plate (32).

6. The apparatus according to claim 5, characterized in that, The connecting seat assembly (3) also includes a brake screw (35), which is mounted on the base plate (32) and its end can contact the guide rail (12).

7. The apparatus according to claim 5, characterized in that, The device for positioning and welding perforated flanges of large rectangular tubes also includes a right-angle ruler (5), which is set on the base plate (32) of the connecting seat assembly (3).

8. The apparatus according to claim 1, characterized in that, The device for positioning and welding perforated flanges of large rectangular tubes also includes a positioning component (4), which includes a second positioning frame (43) and a threaded reinforcing plate (45). The second positioning frame (43) is provided with a plurality of threaded holes (431) in an array, and the threaded reinforcing plate (45) is located inside the second positioning frame (43).

9. The apparatus according to claim 8, characterized in that, The positioning component (4) also includes two bases (41) and a first positioning frame (42). The two bases (41) are respectively connected to the two ends of the first positioning frame (42), and the bases (41) are fixed on the base (11).

10. The apparatus according to claim 8, characterized in that, The positioning assembly (4) also includes a plurality of second adjusting screws (44), which are threadedly connected to threaded holes (431) on the second positioning frame (43).

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