A device for correcting the welding deformation of a steel plate

Abstract

The utility model discloses a device for correcting steel plate welding deformation, including door type frame, inverted V type support wing plate and jack, the door type frame, one side frame column lower extreme is equipped with the hook head, and the hook mouth direction is inward, and the lower extreme of the other side frame column is equipped with the clamping slot, and is adapted with the weld joint, inverted V type support wing plate is perpendicularly arranged below the door type frame, and each is connected with a vertical setting fixed distance board of one side, the jack is arranged between the crossbeam of the door type frame and the top of inverted V type support wing plate. The utility model discloses utilize the jack as power source, and the hook head provides the reaction force, adopts the fixed distance board to press down the protruding place, and the hook head and fixed distance board realize correction by the interaction, and the correction effect is obvious. And the utility model discloses adopt the assembly structure, and the installation and dismounting are simple and easy, can save the artificial cost, reduce the construction difficulty, save time and labour, can improve work efficiency greatly, reduce the labor intensity, shorten the construction period.

Description

Technical Field

[0001] This utility model belongs to the field of petrochemical engineering construction technology, and specifically relates to a device for correcting welding deformation of steel plates. Background Technology

[0002] At the installation sites of newly built petrochemical plants, welding deformation of steel plates has become a common phenomenon. Even with corresponding anti-deformation measures, shrinkage deformation of the welded steel plates still occurs, requiring correction. Patent document CN 219616412 U, published on September 1, 2023, discloses a mechanical correction device for welding deformation of butt welds in steel plates. The device includes a main rigid frame and a correction power unit. The main rigid frame comprises a central U-shaped main beam, an upper U-shaped reaction beam, a lower U-shaped reaction beam, and steel crossbeams. The central U-shaped main beam is welded into a steel frame via the steel crossbeams. The upper and lower U-shaped reaction beams are symmetrically welded to the upper and lower sides of the central U-shaped main beam. The correction power unit includes jacks, with jacks installed at the bottom of the upper and lower U-shaped reaction beams. This mechanical method corrects the welding deformation of the steel plate welds, reducing the need for flame heat correction and avoiding the thermal impact of flames on the steel itself. However, the aforementioned mechanical straightening device uses two jacks, which is time-consuming and labor-intensive, has a complex structure, high cost, is inconvenient to operate, and is not conducive to adjusting the welding deformation of the already laid base plate. Utility Model Content

[0003] This utility model provides a device for adjusting the welding deformation of a completed base plate to solve the technical problems existing in the prior art. The device is simple in structure, low in cost, and easy to use.

[0004] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is: a device for correcting welding deformation of steel plates, including a portal frame, an inverted V-shaped support wing plate and a jack. The portal frame has a hook head at the lower end of one side frame column with the hook opening facing inward, and a slot at the lower end of the other side frame column to fit the weld. The inverted V-shaped support wing plate is vertically arranged below the portal frame, and a vertically arranged spacer plate is connected to each side. The jack is arranged between the crossbeam of the portal frame and the top of the inverted V-shaped support wing plate.

[0005] Based on the above solution, the present invention has made the following improvements:

[0006] The position of the spacer plate is adjustable and connected to the inverted V-shaped support wing plate.

[0007] The spacer plate has a U-shaped structure and is fastened to the inverted V-shaped support wing plate by bolts.

[0008] The portal frame has its side columns adjustablely connected to the crossbeams.

[0009] The portal frame is constructed with the side columns and crossbeams connected by pins.

[0010] The apex angle of the inverted V-shaped support wing plate is greater than 90° and less than 150°.

[0011] The portal frame is made of 3-5mm thick steel plate, and the inverted V-shaped support wing plate is 3-5mm thick.

[0012] Key design considerations for the above-mentioned device:

[0013] 1. Prioritize the rigidity of the device: The rigidity of the tooling itself must be much greater than that of the steel plate being straightened, so as to avoid the tooling from deforming under stress and affecting its accuracy. Q235B steel can be used for its fabrication.

[0014] II. Adaptability: The adjustable structure can be adapted to steel plates of different thicknesses (5-20mm) and sizes (1-6m in length), reducing the limitations of special tooling.

[0015] Third, controllable precision: The point of force application must accurately correspond to the center of deformation to ensure that the correction process is "fine-tunable and does not overshoot".

[0016] The aforementioned device is mainly used for deformation correction of butt welds in on-site welding equipment. The core logic of the correction fixture is "reverse intervention": by analyzing the direction and degree of deformation of the steel plate (e.g., for a steel plate bent downwards, an external force needs to be applied upwards), the correction mechanism generates a force opposite to the direction of deformation, causing the steel plate to undergo plastic deformation under the force, thus offsetting the residual welding stress; if combined with heating, the yield strength of the material in the deformed area is reduced by heating, and correction can be achieved under a smaller external force. After cooling, the stress is redistributed, and the dimensions are stabilized.

[0017] The advantages and positive effects of this utility model are:

[0018] Compared to traditional methods such as manual tapping and flame correction, the advantages of the above-mentioned device are:

[0019] 1. High correction accuracy; flatness can be controlled within 0.5mm / m.

[0020] Second, efficiency can be increased by 3-5 times (avoiding repeated trial and error);

[0021] Third, it can reduce the reliance on the experience of operators;

[0022] Fourth, it can reduce secondary damage to steel plates, such as avoiding local dents caused by manual knocking.

[0023] In summary, by fixing the portal frame to the base plate with a hook on one side and a slot on the other, using a jack as the power source, the hook providing the reaction force, and an inverted V-shaped support wing plate for support, and pressing down on the protrusion with a spacer plate, the interaction between the hook and the spacer plate achieves correction, resulting in a significant correction effect. Furthermore, this invention employs an assembly structure, making installation and disassembly simple and quick. After installation, deformation correction can be achieved, and the assembly can be quickly removed. The minimal labor required for installation and disassembly saves labor costs, reduces construction difficulty, saves time and effort, significantly improves work efficiency, reduces labor intensity, and shortens the construction period. In addition, this invention has a simple structure and low cost. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of this utility model.

[0026] In the diagram: 1. Hook; 2. Slot; 3. Inverted V-shaped support wing plate; 4. Spacer plate; 5. Portal frame; 6. Jack; 7. Local protrusions in the steel plate; 8. Weld. Detailed Implementation

[0027] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings:

[0028] Please see Figure 1 and Figure 2 A device for correcting welding deformation of steel plates includes a portal frame 5, an inverted V-shaped support wing plate 3, and a jack 6. The portal frame 5 has a hook head 1 at the lower end of one side frame column with the hook opening facing inward, and a slot 2 at the lower end of the other side frame column to fit the weld 8. The inverted V-shaped support wing plate 3 is vertically arranged below the portal frame 5, and a vertically arranged spacer plate 4 is connected to each side. The jack 6 is arranged between the crossbeam of the portal frame 5 and the top of the inverted V-shaped support wing plate 3.

[0029] The more preferred solution in this embodiment is as follows:

[0030] The fixed-distance plate 4 is adjustablely connected to the inverted V-shaped support wing plate 3, which has a wider range of applications and is convenient to use.

[0031] The spacer plate 4 adopts a U-shaped structure and is fastened to the inverted V-shaped support wing plate 3 by bolt connection, making position adjustment convenient.

[0032] The portal frame 5 has adjustable side column positions that connect to the crossbeams, making it convenient to use.

[0033] The portal frame 5 has its side columns and crossbeams connected by pins for easy adjustment.

[0034] The apex angle of the inverted V-shaped support wing plate 3 is greater than 90° and less than 150°, making it stable and reliable.

[0035] The portal frame 5 is made of 3-5mm thick steel plate, and the inverted V-shaped support wing plate is 3-5mm thick. This facilitates on-site fabrication.

[0036] Applications of this utility model:

[0037] First, place the portal frame on the weld 8, and hook the hook 1 onto the weld deformation depression and the slot 2 sits on the weld 8 to protect the weld from damage. Then, according to the position of the local protrusion of the weld deformation, connect the spacer plate 4 to the inverted V-shaped support wing plate 3, and move the spacer plate 4 to the local protrusion of the weld deformation 7. Finally, install the jack 6 between the crossbeam of the portal frame 5 and the top of the inverted V-shaped support wing plate 3, and then start the jack 6 to correct the weld deformation depression and the local protrusion 7.

[0038] Advantages of this utility model

[0039] I. Significantly improves correction efficiency and reduces labor costs

[0040] Traditional straightening methods (such as manual tapping or brute force straightening after flame heating) rely on worker experience, are time-consuming, and have inconsistent results. In contrast, specialized tooling, through standardized mechanical structures, can quickly apply precise external force to deformed areas, achieving "one-step" straightening and significantly reducing the straightening time for a single steel plate.

[0041] For mass production scenarios (such as steel structure workshops and steel plate welding in shipbuilding), tooling can enable streamlined operations, reduce reliance on skilled workers, and lower labor training costs and time costs.

[0042] II. High correction accuracy ensures workpiece quality stability.

[0043] The correction of welding deformation requires the application of force of corresponding magnitude and direction according to the amount of deformation (such as bending, twisting, wavy shape, etc.). The tooling can precisely control the correction force and displacement, avoiding the problems of "overcorrection" or "undercorrection" in manual operation.

[0044] The improved precision directly ensures the subsequent assembly accuracy of the steel plate, reduces secondary processing (such as cutting and grinding) caused by deformation, and reduces material waste.

[0045] III. Reduce damage to the properties of steel plates

[0046] While traditional flame straightening can correct deformation by heating and softening the metal, high temperatures may alter the metallographic structure of the steel plate, leading to localized embrittlement and reduced strength, especially affecting high-strength steel plates (such as Q355 and Q460).

[0047] Mechanical straightening fixtures directly adjust deformation through physical external force without the need for high-temperature heating, thus preserving the original mechanical properties of steel plates (such as tensile strength and toughness) to the maximum extent and avoiding material property deterioration caused by straightening.

[0048] IV. Safe and reliable operation, reducing operational risks.

[0049] When manually straightening, workers need to come into close contact with the deformed parts, which may lead to safety accidents such as being crushed or squeezed due to the sudden rebound of the steel plate or the slippage of the tool.

[0050] The tooling uses a sturdy mechanical structure to fix the steel plate, the force transmission during the straightening process is controllable, and it is equipped with protective devices (such as protective covers), which greatly reduces operational risks and complies with safety production standards.

[0051] V. Wide range of applications and high flexibility

[0052] For different thicknesses, materials (carbon steel, stainless steel, alloy steel plates) and deformation types (local bulges, overall bending), the tooling can be adapted by adjusting the support points or changing the direction of the force, without the need for a separate design for each type of steel plate.

[0053] The tooling can also be combined with different components to meet the needs of complex structural components (such as box beams and deformation correction after welding T-shaped steel), thereby improving equipment utilization.

[0054] VI. Reduce overall production costs and enhance enterprise competitiveness

[0055] In summary, tooling can significantly reduce the overall cost of steel plate welding by improving efficiency, ensuring quality, and reducing rework and material waste.

[0056] For industries that prioritize product quality, high-precision correction can improve the reliability of the final product and enhance the company's technological competitiveness in the market.

[0057] The objective of this utility model

[0058] I. Core Functional Objective: To accurately and efficiently correct welding deformation

[0059] Eliminating or controlling deformation: For various deformations such as bending, twisting, wavy, and angular deformation that occur in the steel plate after welding, the deformation is controlled within the design tolerance range by the mechanical force of the tooling (usually, the deformation should be ≤1mm / m or less according to subsequent assembly requirements), ensuring that the shape of the steel plate conforms to the drawing standards.

[0060] Achieve rapid straightening: Compared with traditional manual or simple tools, by optimizing the tooling structure (such as hydraulic drive and multi-station synchronous operation), the straightening time of a single steel plate is shortened. Especially in mass production, it achieves efficient connection of the "welding-straightening" process and avoids production bottlenecks.

[0061] II. Quality Assurance Objective: To ensure the performance of the steel plate and the precision of subsequent assembly.

[0062] Protect the original properties of the steel plate: During the straightening process, avoid excessive external force or high temperature (such as non-flame-assisted tooling) that could cause the mechanical properties of the steel plate to deteriorate (such as reduced strength, reduced toughness, and changes in metallographic structure), and ensure that the straightened steel plate still meets the design requirements for tensile strength, compressive strength, fatigue resistance and other performance indicators.

[0063] Improve assembly compatibility: Through precise correction, ensure the flatness, straightness, angle and other parameters of the steel plate, and ensure the assembly accuracy with other components (such as bolted connections and welded splices), reduce problems such as excessive gaps and misaligned holes caused by deformation, and reduce the probability of secondary processing (such as grinding and welding repair).

[0064] III. Production Efficiency and Economic Objectives: Reduce costs and adapt to large-scale production.

[0065] Reduce labor and material costs: Reduce reliance on highly skilled workers (traditional straightening requires experienced workers) and reduce training costs through standardized operation of tooling; at the same time, avoid scrapping or rework of steel plates due to improper straightening, and reduce material waste.

[0066] Adaptable to multiple scenarios and mass production: It achieves tooling versatility for steel plates of different specifications (thickness, size) and different materials (carbon steel, stainless steel, alloy steel plate) to meet diverse production needs; in mass production, it supports assembly line operation and increases the amount of correction per unit time.

[0067] IV. Operational Safety and Standardization Objectives: Ensure operational safety and achieve standardization.

[0068] Reduce operational risks: The stable operating structure prevents worker injuries (such as crushing or crushing) caused by steel plate slippage or uncontrolled external forces during the straightening process, thus complying with safety production regulations.

[0069] Achieving standardized operation: The tooling replaces the experience-based "manual judgment" with a clear operating procedure, ensuring consistent correction results when used by different operators, and improving the standardization and traceability of the production process.

[0070] The innovativeness of this utility model

[0071] I. Modularization and Multifunctional Integration: From "Single Adaptation" to "Full Coverage"

[0072] Traditional tooling is often designed for specific sizes and single deformation types (such as only correcting bending), and has poor versatility; this tooling breaks through these limitations through modular design and functional integration.

[0073] Reconfigurable core module: The basic frame is fixed, and different specifications of clamping components, force application units and support bases can be quickly replaced to adapt to different thicknesses and complex deformations such as bending, twisting and wavy shapes.

[0074] II. Precise Force Control and Pre-compensation Design: From "Passive Correction" to "Active Regulation"

[0075] Traditional tooling relies on experience to apply force, which can easily lead to overcorrection or incomplete correction. This tooling improves the correction quality through precise force control and pre-deformation compensation.

[0076] Pre-deformation prediction and compensation: Combine welding simulation software (such as ANSYS) to calculate the theoretical deformation of the steel plate after welding in advance (such as a 10m long steel plate may bend by 3mm after welding). The tooling is preset with reverse pre-deformation before welding (such as bending 3.2mm in advance). After welding, it naturally springs back to the qualified range, which greatly reduces the amount of subsequent correction work, which can reduce it by 60%-80%.

[0077] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and these all fall within the protection scope of the present invention.

Claims

1. A device for correcting welding deformation of steel plates, characterized in that, The system includes a portal frame, an inverted V-shaped support wing plate, and a jack. The portal frame has a hook at the lower end of one side frame column with the hook opening facing inward, and a slot at the lower end of the other side frame column to fit the weld. The inverted V-shaped support wing plate is vertically arranged below the portal frame, with a vertically arranged spacer plate connected to each side. The jack is located between the crossbeam of the portal frame and the top of the inverted V-shaped support wing plate.

2. The apparatus for correcting welding deformation of steel plates according to claim 1, characterized in that, The position of the spacer plate is adjustable and connected to the inverted V-shaped support wing plate.

3. The apparatus for correcting welding deformation of steel plates according to claim 1 or 2, characterized in that, The spacer plate has a U-shaped structure and is fastened to the inverted V-shaped support wing plate by bolts.

4. The apparatus for correcting welding deformation of steel plates according to claim 1, characterized in that, The portal frame has its side columns adjustablely connected to the crossbeams.

5. The apparatus for correcting welding deformation of steel plates according to claim 4, characterized in that, The portal frame is constructed with the side columns and crossbeams connected by pins.

6. The apparatus for correcting welding deformation of steel plates according to claim 1, characterized in that, The apex angle of the inverted V-shaped support wing plate is greater than 90° and less than 150°.

7. The apparatus for correcting welding deformation of steel plates according to claim 1, characterized in that, The portal frame is made of 3-5mm thick steel plate, and the inverted V-shaped support wing plate is 3-5mm thick.

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