A method of plate welding

Abstract

The application discloses a flat plate welding method, by adjusting the flat plate welding process method, the stacked flat plate and the flat plate base are preheated to a predetermined temperature together, the flat plate is in a stretched state during high temperature, after being pushed out of the oven, the flat plate and the flat plate base are welded in a predetermined temperature environment, the flat plate base has high structural strength, and the flat plate is less affected by thermal expansion and cold shrinkage, so that the combined flat plate surface is tight and flat, and the problems of uneven surface, wrinkles or wave deformation of the large-area thin plate during welding are solved.

Description

Technical Field

[0001] This invention relates to the field of flat plate manufacturing technology, and more specifically to a flat plate welding method. Background Technology

[0002] Thin plates (generally referring to steel plates with a thickness of about 0.6mm to 3.0mm) are widely used in the container industry, such as in container side panels, end wall panels, door panels, and top panels. In existing technologies, thin plates are often subjected to forming processes, such as forming to obtain corrugated side panels and blind corrugated top panels. However, for some containers with special appearance requirements, such as the wall panels of equipment containers and energy storage containers, a flat overall appearance is often required. Some partitions with large internal spaces, such as the end wall panels of folding containers, also require flat thin plates.

[0003] However, flat plates with a large area (generally referring to an area exceeding 500mm*500mm) and a thin thickness (generally referring to a thickness of 0.6mm to 3.0mm) are prone to unevenness, wrinkling, or wavy deformation after welding. Moreover, this deformation is caused by thermal expansion and contraction due to temperature changes during the welding process, and its deformation pattern is difficult to grasp and control.

[0004] Therefore, in addition to making slight adjustments to the overall structure of the flat plate, adjustments also need to be made to the welding process to reduce deformation problems that occur when welding thin plates with large areas. Summary of the Invention

[0005] The purpose of this invention is to provide a flat plate welding method that can solve problems such as unevenness, wrinkling, or wavy deformation that occur when welding large-area thin plates.

[0006] To achieve the aforementioned objective, this invention provides a method for welding flat plates, comprising:

[0007] Materials preparation: Prepare a flat flat base and a flat plate;

[0008] Calibration: Place the tablet on the tablet base and adjust the position of the tablet;

[0009] Preheating: The stacked flat plates and the flat plate base are preheated to a predetermined temperature;

[0010] Welding: The plate and the plate base are welded together at the predetermined temperature.

[0011] Optionally, the preparation of materials may also include: the flat plate base being pre-welded into an integral frame.

[0012] Optionally, the flat plate may comprise a single piece of steel plate or be welded together from multiple steel plates.

[0013] Optionally, the multiple steel plates are welded using a pressing edge welding method.

[0014] Optionally, the preparation of materials may further include: pre-pressing the flat plate with ribs, forming drainage holes in the ribs, and flattening the ends of the ribs.

[0015] Optionally, after the calibration step and before the preheating step, the step of marking the position of the plate with lines is further included.

[0016] Optionally, the marking process includes: marking lines on the base of the plate along two adjacent sides of the plate.

[0017] Optionally, the preheating step may include the step of spot welding a fixing point to pre-fix the plate onto the plate base.

[0018] Optionally, the fixing point is spot-welded at the intersection of two adjacent sides of the plate.

[0019] Optionally, the predetermined temperature range is 140–180°C.

[0020] Compared to existing technologies, this invention adjusts the thin plate welding process by preheating the stacked plates and plate bases together to a predetermined temperature, causing the plates to be in a stretched state during the high-temperature process. After being removed from the oven, the plates and plate bases are welded in a predetermined temperature environment. The plate base has high structural strength and is less affected by thermal expansion and contraction compared to the plates, resulting in a taut and straight plate surface after assembly. This solves the problem of unevenness, wrinkling, or wavy deformation that may occur when welding large-area thin plates. Attached Figure Description

[0021] Figure 1 This is a flowchart of the flat plate welding method in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the stacked flat plate and flat plate base in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the preheating of the flat plate and its base in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the assembly and welding of the flat plate and the flat plate base after preheating in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the cooled and tightened state of the flat plate and flat plate base after welding in an embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional view of the drainage holes inside the flat ribs in an embodiment of the present invention;

[0027] Figure 7 This is a top view of the drainage holes inside the flat ribs in an embodiment of the present invention.

[0028] In the diagram, 1-flat plate; 2-flat plate base; 101-drainage hole. Detailed Implementation

[0029] The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0030] The invention is described more specifically by way of example in the following paragraphs with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0031] This invention discloses a method for welding flat plates. Please refer to [link / reference]. Figure 1 This includes the following steps:

[0032] S1. Material preparation: Prepare a flat flat base 2 and a flat plate 1;

[0033] S2. Calibration: Place the tablet 1 on the tablet base 2 and adjust the position of the tablet 1.

[0034] S3. Preheating: Preheat the stacked flat plate 1 and flat plate base 2 to the predetermined temperature;

[0035] S4. Welding: Weld the plate 1 and the plate base 2 at a predetermined temperature.

[0036] Please refer to Figures 2-5 In step S1, during the material preparation process, the flat base 2 can be pre-welded into an integral frame.

[0037] The flat plate 1 is a single piece of steel plate or is welded together from multiple small steel plates.

[0038] The automatic butt welding method, which involves pressing the edges of multiple small steel plates together, can effectively control the deformation that occurs during the welding process.

[0039] Furthermore, during the material preparation process, the plate 1 can be pre-treated with ribs. Ribbing can increase the rigidity of the plate 1, making the surface of the plate 1 flatter and the appearance more aesthetically pleasing.

[0040] Please refer to Figures 6-7As shown, drainage holes 101 are provided in the rib for drainage, and the ends of the rib are flattened to make the edge of the plate 1 flatter, which also facilitates the welding of the plate 1 to the plate base 2, and further reduces the deformation generated during the welding of the plate 1.

[0041] In step S2, the plate 1 is placed on the plate base 2, and the position of the plate 1 is adjusted to facilitate direct welding after preheating.

[0042] Furthermore, after step S2 and before step S3, the step of marking the position of the plate 1 by drawing lines is also included.

[0043] The marking process includes: marking lines on the plate base 2 along two adjacent sides of the plate 1 to verify whether the position of the plate 1 changes during movement and preheating.

[0044] Furthermore, prior to step S3, the method includes the step of spot welding a fixing point onto the plate 1, wherein the remaining portion of the plate 1 remains freely extended during heating.

[0045] Before welding, the plate 1 and the plate base 2 are in a separate state and are not pre-welded. Therefore, only one fixing point is spot-welded on the plate 1 to avoid the position of the plate 1 changing during the movement. At the same time, spot-welding only one fixing point also ensures that the rest of the plate 1 can remain freely extended during the preheating process.

[0046] Preferably, a fixing point is spot-welded at the intersection of two adjacent sides of the plate 1. Spot welding at the intersection of two adjacent sides can ensure the expansion of the plate 1 during the preheating process to a greater extent.

[0047] In other embodiments, the process of spot welding the fixing points described above can be performed after the step of calibrating the position of plate 1, or after the step of marking the position of plate 1.

[0048] Furthermore, during the welding process, after preheating the plate 1 and the plate base 2 to a predetermined temperature, they are taken out of the oven together. The position of the plate 1 is checked according to the markings. The plate 1 and the plate base 2 are then welded in the predetermined temperature environment, where the predetermined temperature range is 140 to 180°C.

[0049] The welding process, which involves pushing the plate 1 and the plate base 2 out of the oven together, is carried out at the predetermined temperature to complete the welding before cooling. This process utilizes the difference in expansion and contraction between the plate 1 and the plate base 2 during thermal expansion and contraction to ensure that the surface of the plate 1 is taut and straight.

[0050] In other embodiments, the preheating temperature control and heating time control of the plate 1 can be adjusted according to the thickness and area of ​​the plate 1.

[0051] In summary, this invention provides a plate welding method. Before welding, the plate and plate base, which are in a separate state, are stacked, spot-welded to a fixed point, and marked with positioning lines to ensure the plate is in the correct position. Both are then pushed into an oven for preheating to a predetermined temperature. The plate is in a stretched state at high temperature. After reaching the predetermined temperature, they are immediately removed from the oven. The plate and plate base are then welded together at the predetermined temperature, with each edge of the plate welded to the plate base. After the plate and plate base are welded together, the overall temperature cools. Due to the principle of thermal expansion and contraction, the plate will shrink and tighten. However, because the plate base has a strong structure, it is less affected by thermal expansion and contraction than the plate. Utilizing the difference in expansion and contraction between the plate and plate base during thermal expansion and contraction, the combined plate surface is kept taut and straight, greatly reducing the deformation problems that may occur during plate welding. Furthermore, by pre-setting ribs inside the plate, the rigidity of the plate is increased, and the surface of the plate is made smoother, further reducing the deformation generated during plate welding. The plate welding method provided by this invention is simple to operate, convenient and feasible, and greatly reduces the deformation problems that may occur when welding thin plates with large areas.

[0052] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for welding flat plates, characterized in that, include: Material preparation: Prepare a flat flat base and a flat plate, the area of ​​which is greater than or equal to 500mm*500mm and the thickness is 0.6mm to 3.0mm; Calibration: Place the plate on the plate base, adjust the position of the plate, spot weld a fixing point at the intersection of two adjacent sides of the plate, and pre-fix the plate on the plate base; Preheating: The stacked flat plates and the flat plate base are preheated to a predetermined temperature; Welding: The plate and the plate base are welded together at the predetermined temperature.

2. The plate welding method as described in claim 1, characterized in that, The preparation of materials also includes: the flat plate base is pre-welded into an integral frame.

3. The plate welding method as described in claim 1, characterized in that, The flat plate may be a single piece of steel plate or welded together from multiple steel plates.

4. The plate welding method as described in claim 3, characterized in that, The multiple steel plates were welded using a pressure edge welding method.

5. The plate welding method as described in claim 1, characterized in that, The preparation of materials also includes: pre-pressing the flat plate with ribs, forming drainage holes in the ribs, and flattening the ends of the ribs.

6. The plate welding method as described in claim 1, characterized in that, The step following the calibration step and preceding the preheating step includes: marking the position of the plate with lines.

7. The plate welding method as described in claim 6, characterized in that, The process of marking the lines includes: making markings on the base of the plate along two adjacent sides of the plate.

8. The plate welding method as described in claim 1, characterized in that, The predetermined temperature range is 140~180℃.

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