Platform structure and welding method thereof

Abstract

The invention provides a platform structure and a welding method thereof. The platform structure comprises side cross beams, side longitudinal beams, a plurality of short longitudinal bones, a plurality of long longitudinal bones, a plurality of spaced cross beams, a plurality of short longitudinal bone beams, a plurality of long longitudinal bone beams, an upper panel and a lower panel. A rectangular frame is defined by the side cross beams; the short longitudinal ribs and the long longitudinal ribs are arranged in the rectangular frame side by side in the longitudinal direction. The plurality of spaced cross beams are arranged at intervals in the transverse direction, the short longitudinal bones are located between the side cross beams and the spaced cross beams, and the long longitudinal bones are located between the spaced cross beams; the short longitudinal bone beams and the long longitudinal bone beams are arranged side by side in the longitudinal direction and located among the short longitudinal bones; the upper panel and the lower panel are laid on the upper end face and the lower end face of the rectangular frame. The technical problem that in the prior art, a platform structure which is used for large-size thin plates, beneficial to welding and capable of reducing deformation does not exist is solved.

Description

Technical field:

[0001] The invention relates to the technical field of platform plates, and in particular to a platform structure and a welding method thereof. Background technology:

[0002] The platform plate of the combined platform passage is welded from thin high-strength steel plates. It has large external dimensions and is thin in thickness. After welding, it needs to be ensured that it can be used interchangeably, and the overall bridge deck is not allowed to deflect.

[0003] However, flat plates with a large area (generally referring to an area exceeding 2500mm×6000mm) and a relatively thin thickness (generally referring to a thickness of 100mm-150mm) are prone to large welding deformation, wrinkling or wave deformation, and large shrinkage after welding. This deformation is caused by thermal expansion and contraction due to temperature changes during welding. Its deformation law is difficult to grasp and it is difficult to control it using conventional welding methods. Therefore, in addition to slight adjustments to the overall structure, adjustments to the welding process are also required to reduce deformation and shrinkage during welding.

[0004] There is an urgent need for a platform structure that helps solve the technical problem in the prior art of lacking a platform structure that is easy to weld and reduces deformation for large-size, thin plates. Summary of the invention:

[0005] In one embodiment, the present invention provides a platform structure, which includes side cross beams, side longitudinal beams, multiple short longitudinal bones and multiple long longitudinal bones, multiple spacer cross beams, multiple short longitudinal bone beams and multiple long longitudinal bone beams, an upper panel and a lower panel. In addition to reinforcing the structure with different profiles, it is beneficial to subsequent welding to prevent deformation, which helps to solve the technical problem in the prior art that there is a lack of a platform structure that is easy to weld and reduces deformation for large sizes and thin plates.

[0006] The platform structure includes side cross beams, side longitudinal beams, a plurality of short longitudinal bones and a plurality of long longitudinal bones, a plurality of spacer cross beams, a plurality of short longitudinal bone beams and a plurality of long longitudinal bone beams, an upper panel and a lower panel;

[0007] The side beams and the side beams enclose a rectangular frame;

[0008] The short longitudinal bones and the long longitudinal bones are arranged side by side in the longitudinal direction in the rectangular frame, wherein the short longitudinal bones and the long longitudinal bones are T-shaped steels;

[0009] A plurality of spaced cross beams are arranged in a transversely spaced manner, the short longitudinal bones are located between the side cross beams and the spaced cross beams, and the long longitudinal bones are located between the spaced cross beams;

[0010] A plurality of short longitudinal beams and a plurality of long longitudinal beams, wherein the short longitudinal beams and the long longitudinal beams are arranged in parallel along the longitudinal direction and are located between the plurality of short longitudinal beams, wherein the short longitudinal beams and the long longitudinal beams are I-beams;

[0011] The upper panel and the lower panel are laid on the upper end surface and the lower end surface of the rectangular frame.

[0012] In one embodiment, two adjacent intermediate spacing beams are arranged side by side in the longitudinal direction, namely, a first middle beam and a second middle beam.

[0013] In one embodiment, the present invention further provides a platform welding method. Based on the platform structure, the platform welding method includes:

[0014] After spot welding the side cross beams and the side longitudinal beams, as well as the spacing cross beams, the first middle cross beam, and the second middle cross beam, start from the two ends of the first middle cross beam and sequentially weld the two ends of the second middle cross beam, the two middle spacing cross beams close to one end of the second middle cross beam, the other ends of the two middle spacing cross beams, one end of the remaining spacing cross beams close to one end of the second middle cross beam, and the other end of the second middle cross beam, the intersection of the side cross beam and the side longitudinal beam close to one end of the second middle cross beam, and the intersection of the side cross beam and the side longitudinal beam close to the other end of the second middle cross beam to obtain a gantry welding frame;

[0015] After the bench welding frame is cooled, subsequent components are welded.

[0016] In one embodiment, after the step of waiting for the bench welding frame to cool down, the method further comprises:

[0017] Choose to place the sleepers vertically at one quarter and three quarters of the side stringers.

[0018] In one embodiment, a plurality of short longitudinal bones and a plurality of long longitudinal bones are welded from the middle to both sides, and are welded from the middle to both sides along the transverse direction at the same longitudinal position.

[0019] In one embodiment, the stand welding frame is divided into 3 large areas and 15 small areas, and the long longitudinal bones are welded first, and then the short longitudinal bones are welded.

[0020] In one embodiment, after the steps of welding a plurality of short longitudinal bones and a plurality of long longitudinal bones from the middle to both sides, and welding from the middle to both sides in the transverse direction at the same longitudinal position, the method further comprises:

[0021] The welded stand welding frame is turned over to complete the lower panel.

[0022] In one embodiment, the welded stand welding frame is turned over to complete the lower panel step and then the anti-slip strip is welded.

[0023] In one embodiment, after the step of turning over the welded stand welding frame to complete the step of welding the anti-slip strip and the step of welding the lower panel, the method comprises:

[0024] Concentrate the correction position at both ends of the platform plate and the fire-baking rib position.

[0025] In one embodiment, after the step of concentrating the correction positions at the two ends of the platform plate and the position of the ribs, the method further comprises:

[0026] After final assembly and outfitting, the dimensions are corrected again. Description of the drawings:

[0027] Figure 1 This is a schematic diagram of a platform structure in one embodiment of the present invention;

[0028] Figure 2 It is a schematic cross-sectional view of a platform plate in another embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of welding on a platform tire in another embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the anti-deformation control structure under the platform tire in another embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the welding sequence of the main frame under the platform plate tire in another embodiment of the present invention;

[0032] Figure 6 It is a block schematic diagram of the welding of the under-tire platform plate in another embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of welding the long longitudinal bones of the platform plate A part in another embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of welding the long longitudinal bones of the platform plate B part in another embodiment of the present invention;

[0035] Fig. 9 This is a schematic diagram of welding the long longitudinal bones of the platform plate C portion in another embodiment of the present invention;

[0036] Fig.10 This is a schematic diagram of the welding parts of the platform plate flip in another embodiment of the present invention;

[0037] Fig.11 A flow chart of platform plate calibration in another embodiment of the present invention;

[0038] Fig.12 The present invention is another embodiment of the platform plate in the present invention in order to correct the baking position.

[0039] Reference numerals:

[0040] Side beam 1

[0041] Side beam 2

[0042] Short longitudinal bone 3

[0043] Longitudinal bone 4

[0044] Spacer beam 5

[0045] Short longitudinal beam 6

[0046] Long longitudinal beam 7

[0047] Upper panel 8

[0048] Lower panel 9

[0049] Rectangular border 10

[0050] First middle beam 11

[0051] Second middle crossbar 12

[0052] Sleepers 13

[0053] Welding anti-slip strip 14 Specific embodiment:

[0054] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0055] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0056] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0057] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0058] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0059] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0060] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0061] Due to the large size, multi-beam, thin plate (plate thickness 3-10mm) platform plate, the length-thickness ratio (greater than 50) and width-thickness ratio (greater than 20) are large, and there are many longitudinal and transverse beams. During the welding process, there are many welds and the welds are long. The deformation law is not well understood and difficult to control. Therefore, how to meet the requirements by adjusting the welding process is the most difficult.

[0062] Figure 1 This is a schematic diagram of a platform structure in one embodiment of the present invention; Figure 2 It is a schematic cross-sectional view of a platform plate in another embodiment of the present invention; Figure 3 It is a schematic diagram of welding on a platform tire in another embodiment of the present invention; Figure 4 It is a schematic diagram of the anti-deformation control structure under the platform tire in another embodiment of the present invention; Figure 5 It is a schematic diagram of the welding sequence of the main frame under the platform plate tire in another embodiment of the present invention; Figure 6 It is a block schematic diagram of the welding of the under-tire platform plate in another embodiment of the present invention; Figure 7 This is a schematic diagram of welding the long longitudinal bones of the platform plate A part in another embodiment of the present invention; Figure 8 This is a schematic diagram of welding the long longitudinal bones of the platform plate B part in another embodiment of the present invention; Fig. 9 This is a schematic diagram of welding the long longitudinal bones of the platform plate C portion in another embodiment of the present invention; Fig.10 This is a schematic diagram of the welding parts of the platform plate flip in another embodiment of the present invention; Fig.11 A flow chart of platform plate calibration in another embodiment of the present invention; Fig.12 The present invention is another embodiment of the platform plate in the present invention in order to correct the baking position.

[0063] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a welding method for a large-size, multi-beam, thin-plate platform plate to solve the problems of overall shrinkage of structural parts and welding deformation.

[0064] like Figures 1 to 12 As shown, in one embodiment, the present invention provides a platform structure, which includes side cross beams, side longitudinal beams, a plurality of short longitudinal bones and a plurality of long longitudinal bones, a plurality of spaced cross beams, a plurality of short longitudinal bone beams and a plurality of long longitudinal bone beams, an upper panel and a lower panel;

[0065] The side beams and the side beams enclose a rectangular frame;

[0066] The short longitudinal bones and the long longitudinal bones are arranged side by side in the longitudinal direction in the rectangular frame, wherein the short longitudinal bones and the long longitudinal bones are T-shaped steels;

[0067] A plurality of spaced cross beams are arranged in a transversely spaced manner, the short longitudinal bones are located between the side cross beams and the spaced cross beams, and the long longitudinal bones are located between the spaced cross beams;

[0068] A plurality of short longitudinal beams and a plurality of long longitudinal beams, wherein the short longitudinal beams and the long longitudinal beams are arranged in parallel along the longitudinal direction and are located between the plurality of short longitudinal beams, wherein the short longitudinal beams and the long longitudinal beams are I-beams;

[0069] The upper panel and the lower panel are laid on the upper end surface and the lower end surface of the rectangular frame.

[0070] The platform plate is an integral frame structure with large size. It is welded from multiple longitudinal beams, transverse beams, longitudinal bones, bridge panels and anti-slip strips of different lengths. The side transverse beams, side longitudinal beams, middle transverse beams, long longitudinal beams and short longitudinal beams are all "I"-shaped structural beams welded from thin plates; the long longitudinal bones and short longitudinal bones are all "T"-shaped structural beams, also welded from thin plates.

[0071] In one embodiment, two adjacent intermediate spacing beams are arranged side by side in the longitudinal direction, namely, a first middle beam and a second middle beam.

[0072] In one embodiment, the present invention further provides a platform welding method. Based on the platform structure, the platform welding method includes:

[0073] After spot welding the side cross beams and the side longitudinal beams, as well as the spacing cross beams, the first middle cross beam, and the second middle cross beam, start from the two ends of the first middle cross beam and sequentially weld the two ends of the second middle cross beam, the two middle spacing cross beams close to one end of the second middle cross beam, the other ends of the two middle spacing cross beams, one end of the remaining spacing cross beams close to one end of the second middle cross beam, and the other end of the second middle cross beam, the intersection of the side cross beam and the side longitudinal beam close to one end of the second middle cross beam, and the intersection of the side cross beam and the side longitudinal beam close to the other end of the second middle cross beam to obtain a gantry welding frame;

[0074] After the bench welding frame is cooled, subsequent components are welded.

[0075] In one embodiment, after the step of waiting for the bench welding frame to cool down, the method further comprises:

[0076] Choose to place the sleepers vertically at one quarter and three quarters of the side stringers.

[0077] In one embodiment, a plurality of short longitudinal bones and a plurality of long longitudinal bones are welded from the middle to both sides, and are welded from the middle to both sides along the transverse direction at the same longitudinal position.

[0078] In one embodiment, the stand welding frame is divided into 3 large areas and 15 small areas, and the long longitudinal bones are welded first, and then the short longitudinal bones are welded.

[0079] In one embodiment, after the steps of welding a plurality of short longitudinal bones and a plurality of long longitudinal bones from the middle to both sides, and welding from the middle to both sides in the transverse direction at the same longitudinal position, the method further comprises:

[0080] The welded stand welding frame is turned over to complete the lower panel.

[0081] In one embodiment, the welded stand welding frame is turned over to complete the lower panel step and then the anti-slip strip is welded.

[0082] In one embodiment, after the step of turning over the welded stand welding frame to complete the step of welding the anti-slip strip and the step of welding the lower panel, the method comprises:

[0083] Concentrate the correction position at both ends of the platform plate and the fire-baking rib position.

[0084] In one embodiment, after the step of concentrating the correction positions at the two ends of the platform plate and the position of the ribs, the method further comprises:

[0085] After final assembly and outfitting, the dimensions are corrected again.

[0086] All beams need to be calibrated after welding. Only after calibration can they be used for subsequent assembly welding. Calibration is as follows: Fig.10 conduct.

[0087] Furthermore, an assembly frame needs to be manufactured before welding, and the frame needs to pre-place welding shrinkage allowances in the length and width directions of the platform plate.

[0088] Further, according to the attached Figure 3 The platform plate adopts the inverted assembly method. The platform plate is first assembled on the platform plate assembly frame, and the spot welding panels, longitudinal and transverse beams, longitudinal bones, etc. are assembled. The welding on the frame is mainly based on the welding of the inner main frame. The welding method is vertical welding first, then flat welding, and the welding is symmetrical. The main frame of the platform plate is welded on the frame and cooled before being removed from the frame.

[0089] Furthermore, after the tire is inspected and qualified, in order to ensure that the tire does not sag as a whole after the longitudinal and transverse beams are welded under the tire, sleepers are placed at 1 / 4 and 3 / 4 of the longitudinal beams to form a camber by gravity to withstand the deformation caused by load and welding shrinkage. Figure 4 .

[0090] Furthermore, during welding, the welding personnel shall weld in a central, symmetrical and synchronous manner. Figure 5 Weld in the welding sequence shown in (①→②→③→④→⑤→⑥), weld the long longitudinal beams in turn, and then weld the short longitudinal beams.

[0091] Furthermore, after the entire frame is welded, as shown in the attached figure, the welding of the longitudinal bones is divided into 3 large areas A, B, and C, and 15 small pieces. The welding personnel weld the long longitudinal bones first, then the short longitudinal bones. The specific longitudinal bone welding sequence is: first weld the A mark area, then weld the B mark area, and finally weld the C mark area.

[0092] Further, the welding sequence of Part A is shown in the attached Figure 7 , from A1→A2, ①→②→③→④.

[0093] Further, the welding sequence of part B is shown in the attached Figure 8 , from B1→B2, ①→②→③→④→⑤→⑥→⑦→⑧.

[0094] Further, the welding sequence of part C is shown in the attached Fig. 9 , from C1→C2, ①→②→③→④→⑤→⑥→⑦→⑧.

[0095] Further, after the bottom surface welding is completed, press the attached Fig.10 Turn over and complete the panel and anti-slip strip welding.

[0096] Furthermore, in order to control the overall welding shrinkage and ensure a certain welding efficiency, the thinnest plate of the platform plate is made of a small diameter welding wire, and the remaining plate thickness of the platform plate is made of a larger No. 1 specification welding wire. By using two different welding wires, the final overall shrinkage can be controlled.

[0097] Furthermore, the platform plate needs to be corrected after welding to ensure that the overall dimensions after welding are controlled, especially the total width. In order to ensure that the platform plate as a whole does not deflect, when correcting the width dimension, the correction position is concentrated at both ends of the platform plate, the fire-baked rib position (short longitudinal beam), as shown in the attached Fig.12 .

[0098] Compared with the prior art, the beneficial effects of the present invention are: it solves the problems of welding deformation and excessive shrinkage of large-size, multi-beam, and thin-plate platform plates; at the same time, due to the adoption of a set of effective process methods, the overall welding deformation of the product is better controlled, the later correction workload is small, and the method of matching and applying different welding wires is adopted. While ensuring the welding efficiency of the product is small, the welding shrinkage beam is better controlled, the shrinkage is in a controllable state, and the product's external dimensions are guaranteed.

[0099] Based on the above welding process, the overall idea is as follows:

[0100] Cutting: Prepare various boards according to process requirements.

[0101] Welding: Weld the longitudinal and transverse beams according to the process requirements.

[0102] Alignment: Straightening of individual parts after welding.

[0103] Preparation of tire frame: according to the requirements of the external dimensions, reserve the length and width margin of the platform plate, and design and manufacture the welding tire frame;

[0104] Adjustment: Add pads to the side beams and middle beams to adjust the pre-welding shrinkage allowance and reduce the assembly gap;

[0105] Welding: Select parts from the aforementioned longitudinal and transverse beam welding parts and put them on the tire frame to complete the main frame welding.

[0106] Pre-arch: After the frame is welded, the tire is lowered and sleepers are placed under the tire during welding. Gravity is used to form an arch to withstand the deformation caused by load and welding shrinkage.

[0107] Welding: Multiple welders weld the long longitudinal beams in a central, symmetrical and synchronous manner according to a fixed welding sequence, and weld the long longitudinal beams → short longitudinal beams in sequence.

[0108] Welding: The welding of longitudinal bones is divided into large areas and small blocks. Multiple welders weld the long longitudinal bones first, then the short longitudinal bones, in a centralized, symmetrical and synchronous manner.

[0109] Welding: Finally, turn the panel over to complete the welding seams and anti-slip strips.

[0110] Correction: After welding is completed, the entire platform plate is corrected to ensure that the deformation after welding meets the requirements.

[0111] Beneficial effects:

[0112] Compared with the prior art, the present invention controls the reserved allowance for raw material cutting size, segmented welding correction processing, block welding processing, welding sequence, and selection of welding wires of different diameters. The reserved allowance compensates for the shrinkage during welding, and can control the external dimensions of the platform plate within a reasonable range; the segmented correction processing solves the large deformation caused by cumulative welding; the block welding, welding sequence, and selection of welding wires of different diameters ensure that welding deformation is controlled to a smaller extent while ensuring welding efficiency. The adoption of the above means solves the overall shrinkage and welding deformation of the structural parts that may occur during welding of large-sized, multi-beam, and thin-plate platform plates, and ensures the structural dimensions and product quality of the platform plates.

[0113] This method is suitable for welding thin plate frame structural parts with high requirements for structural dimensional accuracy after welding, large thickness-width and thickness-length ratios, and many longitudinal and transverse beams.

[0114] The method controls aspects such as raw material size processing, welding segmentation steps, wire diameter and welding parameters, which can better meet the overall shrinkage and welding deformation of the structural parts and ensure the structural size and product quality of the channel plate.

[0115] The invention relates to the technical field of platform plates, and in particular to a welding method for a large-size, multi-beam, thin-plate platform plate.

[0116] Due to the large size, multi-beam, thin plate (plate thickness 3-10mm) platform plate, the length-thickness ratio (greater than 50) and width-thickness ratio (greater than 20) are large, and there are many longitudinal and transverse beams. During the welding process, there are many welds and the welds are long. The deformation law is not well understood and difficult to control. Therefore, how to meet the requirements by adjusting the welding process is the most difficult.

[0117] The present invention controls the welding deformation of the platform plate and more accurately controls the shrinkage of the outer dimensions of the platform plate through an innovative welding process method.

[0118] The innovation of the present invention: The present invention solves the problems of welding deformation and excessive shrinkage of large-size, multi-beam, and thin-plate platform plates; at the same time, due to the adoption of a set of effective process methods, the overall welding deformation of the product is better controlled, the later correction workload is small, and the method of matching and applying different welding wires is adopted. While ensuring the welding efficiency of the product is small, the welding shrinkage beam is better controlled, the shrinkage is in a controllable state, and the product's external dimensions are guaranteed.

[0119] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A platform structure, characterized in that: The platform structure comprises: A crossbeam (1); A side longitudinal beam (2), which forms a rectangular frame (10) with the side transverse beam (1); A plurality of short longitudinal bones (3) and a plurality of long longitudinal bones (4), wherein the short longitudinal bones (3) and the long longitudinal bones (4) are arranged side by side in the longitudinal direction in the rectangular frame (10), wherein the short longitudinal bones (3) and the long longitudinal bones (4) are T-shaped steels; A plurality of spaced cross beams (5) are arranged in a spaced manner in the transverse direction, wherein the short longitudinal bones (3) are located between the side cross beams (1) and the spaced cross beams (5), and the long longitudinal bones (4) are located between the spaced cross beams (5); A plurality of short longitudinal bone beams (6) and a plurality of long longitudinal bone beams (7), wherein the short longitudinal bone beams (6) and the long longitudinal bone beams (7) are arranged side by side in the longitudinal direction and are located between the plurality of short longitudinal bones (3), wherein the short longitudinal bone beams (6) and the long longitudinal bone beams (7) are I-beams; An upper panel (8) and a lower panel (9) are laid on the upper end surface and the lower end surface of the rectangular frame (10).

2. The platform structure according to claim 1, characterized in that: The two adjacent spacing beams are arranged side by side in the longitudinal direction, namely a first middle beam (11) and a second middle beam (12).

3. A platform welding method, characterized in that: Based on the platform structure described in claim 2, the platform welding method comprises: After spot welding the side cross beam (1) and the side longitudinal beam (2), as well as the spacing cross beam (5), the first middle cross beam (11), and the second middle cross beam (12), the two ends of the second middle cross beam (12), the other ends of the two middle spacing cross beams (5), the other ends of the remaining spacing cross beams (5) near one end of the second middle cross beam (12), and the other end of the second middle cross beam (12), the intersection of the side cross beam (1) and the side longitudinal beam (2) near one end of the second middle cross beam (12), and the intersection of the side cross beam (1) and the side longitudinal beam (2) near the other end of the second middle cross beam (12) are welded in sequence to obtain a gantry welding frame; After the bench welding frame is cooled, subsequent components are welded.

4. The platform welding method according to claim 1, characterized in that: After the step of waiting for the bench welding frame to cool down, the method further comprises: The sleepers (13) are placed vertically at the one-quarter and three-quarter positions of the side longitudinal beam (2).

5. The platform welding method according to claim 4, characterized in that: The welding subsequent components include: A plurality of short longitudinal bones (3) and a plurality of long longitudinal bones (4) are welded from the middle to both sides, and are welded from the middle to both sides along the transverse direction at the same longitudinal position.

6. The platform welding method according to claim 5, characterized in that: The bench welding frame is divided into 3 large areas and 15 small areas, and the long longitudinal bones are welded first, and then the short longitudinal bones are welded.

7. The platform welding method according to claim 6, characterized in that: After the steps of welding a plurality of short longitudinal bones (3) and a plurality of long longitudinal bones (4) from the middle to both sides, and welding from the middle to both sides in the transverse direction at the same longitudinal position, the method further comprises: The welded stand welding frame is turned over to complete the lower panel.

8. The platform welding method according to claim 7, characterized in that: The welded stand welding frame is turned over to complete the lower panel step and then the anti-slip strip (14) is welded.

9. The platform welding method according to claim 8, characterized in that: After the step of turning over the welded stand welding frame to complete the step of welding the anti-slip strip and the step of welding the lower panel, the method comprises: Concentrate the correction position at both ends of the platform plate and the fire-baking rib position.

10. The platform welding method according to claim 9, characterized in that: After the step of concentrating the correction position at both ends of the platform plate and the position of the fire-baked ribs, the method further comprises: After final assembly and outfitting, the dimensions are corrected again.

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