Machining and manufacturing method for box-type rotating steel pipe column

Abstract

The invention relates to a processing and manufacturing method of a box-type rotary steel pipe column, which comprises the following steps of: 1, manufacturing a steel pipe structure, namely assembling a vertical cross-shaped stiffener, a conversion plate and an inner partition plate, and slotting the outer wall of a steel pipe to realize the connection of the cross-shaped stiffener and the steel pipe; 2, manufacturing a cross-shaped stiffening box-type web structure: assembling a vertical cross-shaped stiffening, a partition plate and a box-type column web, and completing welding; 3, the steel columns are integrally connected, specifically, the cross stiffeners, the web parts of the box body and the lower steel pipes are assembled into a whole, and welding is completed; and fourthly, welding the inner partition plate and the main welding seams of the box type structure, wherein electroslag welding of the inner partition plate and the box body cover plate and welding of the four main welding seams of the box body are completed. By formulating the advanced, scientific and reasonable assembling and welding sequence and method, accurate assembly of components and efficient welding of all welding seams are achieved, and therefore the production cost is reduced, the machining efficiency is improved, and innovative development of the whole steel structure and even the building field is promoted.

Description

Technical Field

[0001] The invention relates to the field of steel structures, in particular to a method for processing and manufacturing a box-type steel pipe column. Background Art

[0002] In modern architecture, with the rapid development of the economy, high-rise buildings and large, complex structures are increasing in number. To meet the diverse architectural and structural requirements, steel structures are widely used due to their high strength, lightweight, and convenient construction. Among these, box-type steel tubular columns, as a new type of steel structural component, are gaining popularity among designers due to their unique structural form and excellent mechanical properties.

[0003] Box-type steel tubular columns combine the advantages of box columns and steel tubular columns, offering the favorable cross-sectional properties and torsional rigidity of box columns with the efficient force transmission and aesthetically pleasing appearance of steel tubular columns. To further enhance structural performance, designers often incorporate vertical cross-stiffeners and transverse partitions within the steel columns. These stiffeners and partitions effectively enhance the local stability and overall rigidity of the steel columns, resulting in superior mechanical properties when subjected to complex loads.

[0004] However, this design of adding vertical cross stiffeners and transverse partitions inside also brings unprecedented challenges to the processing and production of box-type steel pipe columns. First of all, from the perspective of processing accuracy, the precise installation of vertical cross stiffeners and transverse partitions places extremely high demands on welding processes and assembly technology. Any slight deviation may lead to a decline in structural performance and even cause safety hazards. Secondly, welding quality is also a major problem. Due to the presence of stiffeners and partitions, the form of welded joints becomes complex and diverse, and stress concentration, deformation and other problems are prone to occur during the welding process, seriously affecting welding quality and structural safety. In addition, production efficiency is also one of the constraints. Traditional processing and manufacturing methods are often inefficient and difficult to meet the needs of rapid construction of high-rise buildings.

[0005] While some technologies and methods for manufacturing box-type steel columns exist within the industry, they suffer from low efficiency, high costs, and difficulty ensuring precision. These issues not only limit their widespread application in high-rise buildings but also hinder the overall development of the steel structure industry. Summary of the Invention

[0006] The present invention aims to overcome the defects of the prior art and provide a method for processing and manufacturing a box-type steel pipe column to solve the above technical problems.

[0007] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: A method for processing and manufacturing a box-shaped steel pipe column, characterized in that it includes the following steps: Step 1: Fabrication of steel pipe structure: Assemble the vertical cross stiffeners with the transfer plate and inner partition, and cut grooves on the outer wall of the steel pipe to connect the cross stiffeners with the steel pipe; Step 2: Fabrication of cross-stiffener and box-type web structure: Assemble the vertical cross stiffeners and partitions with the box-type column webs and complete welding; Step 3: Steel columns are integrally connected: the cross stiffeners, the box webs, and the lower steel pipes are assembled into a whole and welded together; Step 4: Welding of the inner partition and main welds of the box structure: Complete the electroslag welding of the inner partition and the box cover, as well as the welding of the four main welds of the box.

[0008] The method for processing and manufacturing a box-type steel pipe column is characterized in that step one is specifically: assembling the vertical cross reinforcement, the conversion plate and the inner partition according to the drawing dimensions, and completing the weld welding in sequence; laying out the position of the cross reinforcement to the outer wall of the steel pipe, using a semi-automatic cutting machine to groove the steel pipe wall plate, and opening a groove at the end of the groove in the length direction. The groove width is 6mm wider than the cross reinforcement on each side to serve as the welding gap. The groove is a 45° welding groove, and a pad is added to the inner wall to achieve full penetration of the weld; then the cross reinforcement and the partition are inserted into the steel pipe as a whole, and the weld welding is completed in sequence; finally, the assembly and welding of the external reinforcement of the steel pipe are completed.

[0009] The method for processing and manufacturing a box-type steel pipe column is characterized in that step two is specifically: assembling and welding the vertical cross stiffeners in the box structure together with the internal transverse partitions; then assembling the vertical cross stiffeners and partitions with the box column webs, and completing the weld welding in sequence.

[0010] The method for processing and manufacturing a box-type steel pipe column is characterized in that step three specifically comprises: assembling the cross stiffener together with the box web part and the lower steel pipe into a whole, and completing the weld welding; then slotting and assembling the box column cover plate to the corresponding position in the drawing, and completing the welding of the box flange plate and the conversion plate by adding a gasket and leaving a gap.

[0011] The method for processing and manufacturing a box-type steel pipe column is characterized in that step four is specifically as follows: first, the weld between the vertical cross reinforcement and the box cover is completed, and the welds are welded symmetrically from the middle to both sides; then the inner partition and the box cover are electroslag welded, and the cross reinforcements on both sides of the transverse partition are opened so that the electroslag welding wall panels can be assembled smoothly. The thickness of the electroslag welding wall panel is 25mm, and the assembly gap of the electroslag welding weld is between 24 and 26mm. The diameter of the steel pipe of the electroslag welding rod of the melting nozzle is 10mm, the diameter of the welding wire is 3.2mm, the welding current is 360~400A, and the welding voltage is 39~45V. The width direction of the component ensures that the electroslag welding on both sides of the inner partition is symmetrical, and the length direction ensures that the inner partition is welded symmetrically from the middle to both sides; finally, the four main welds of the box body are completed in sequence, namely, base welding, filling, and cover welding. During the welding process, it is also necessary to ensure that the welds are welded symmetrically and evenly to ensure that the welds meet the requirements of non-destructive testing and appearance.

[0012] The beneficial effects of the present invention are as follows: As can be seen from the above technical solution, this application provides a method for processing and manufacturing box-type steel pipe columns. The structural column is divided into two parts by a central conversion plate. The upper structure is a welded box-type structure with vertical cross-stiffening plates inside. The cross-stiffening plates divide the interior of the box into four chambers, each of which contains multiple internal partitions. The lower structure is a steel pipe structure with vertical cross-stiffening plates inside. The present invention describes an efficient assembly and welding method for the above-mentioned components, achieving precise component assembly and efficient welding of all welds.

[0013] The present invention achieves the rapid and efficient processing and production of box-type steel pipe columns containing vertical cross stiffeners and transverse partitions by formulating advanced, scientific, and reasonable welding sequences and methods. For example, during the production of steel pipe structures, notches are provided in the wall panels, which enables all-round welding of the wall panels and the internal cross stiffeners, thus avoiding the welding difficulties and time waste caused by the complex internal structure in traditional welding methods. At the same time, in the welding steps of the partitions and main welds in the box-type structure, a symmetrical welding sequence from the middle to both sides and double-sided electroslag welding technology are adopted, which further improves the welding efficiency and ensures the high-quality completion of the welds. These optimization measures greatly shorten the processing and production cycle and improve production efficiency.

[0014] Traditional methods for processing and manufacturing box-type steel pipe columns present numerous problems, such as the need for welders to enter the interior of the component to perform operations, which not only increases labor costs but also reduces production efficiency. However, by optimizing the process flow, this present invention allows all welds to be performed externally, eliminating the need for welders to enter the interior, thereby effectively reducing labor costs. Furthermore, the precise welding sequence and method can reduce material waste during the welding process, improve material utilization, and further reduce production costs. Furthermore, the improved processing efficiency indirectly reduces the company's operating costs, bringing significant economic benefits.

[0015] The present invention ensures the overall dimensional accuracy and weld quality of the box-type steel pipe column through precise assembly and welding processes. During the production of the steel pipe structure, the width of the notch is 6mm wider on each side than the cross reinforcement, the notch is a 45° welding groove, and a pad is added to the inner wall to achieve full penetration of the weld. These detailed designs ensure high-quality welding and improve the strength and stability of the structure. In the welding steps of the partitions and main welds in the box-type structure, a symmetrical welding method is adopted to effectively control the overall dimensional deviation of the components within 1~2mm, ensuring that the welds meet the requirements of non-destructive testing and appearance. High-quality processing and manufacturing not only improves the performance and reliability of the product, but also reduces the rework and maintenance costs caused by quality problems, further enhancing the company's market competitiveness.

[0016] Traditional fabrication methods require welders to enter the interior of the box-shaped steel pipe column to perform operations, which poses significant safety risks, such as the inconvenience of working in the confined space and the accumulation of welding fumes and hazardous gases. However, this invention optimizes the process flow, allowing all welds to be performed externally, eliminating the need for welders to enter the interior. This significantly reduces safety risks and ensures the personal safety of welders. This is of great significance to enterprise safety management, helping them better comply with safety regulations and reduce the occurrence of safety accidents.

[0017] This invention proposes a novel method for processing and manufacturing box-type steel pipe columns, offering new insights and approaches for innovative development in the steel structure and construction fields. By employing advanced techniques such as notching the wall panels and double-sided electroslag welding, it overcomes challenges inherent in traditional processing methods and improves both efficiency and quality. This innovative technical solution will not only generate economic benefits for businesses but also promote technological advancement across the entire steel structure industry, fostering the widespread adoption of new steel structural components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1Schematic diagram of a box-type steel pipe column containing vertical cross stiffeners and transverse partitions; Figure 2 Create a flow chart for a box-type steel pipe column with vertical cross stiffeners and transverse diaphragms; Figure 3 This is a schematic diagram of steel pipe grooving and cross-stiffening welding; Figure 4 This is a schematic diagram of the welding of steel pipes and cross stiffening plates; Figure 5 This is a schematic diagram of the external reinforcement welding of the steel pipe; Figure 6 This is a schematic diagram of the welding of the cross wall plate and the stiffener; Figure 7 This is a schematic diagram of the welding between the box column web and the cross stiffener; Figure 8 This is a schematic diagram of the welding of the steel pipe structure, the upper box web and the cross stiffener; Figure 9 Schematic diagram of slotting and assembling the upper box cover; Figure 10 This is a schematic diagram of the box cross-section welding. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection requested by this application. like Figure 1 、 2 Shown: A method for processing and manufacturing a box-type steel pipe column containing vertical cross reinforcement and transverse partitions. The specific steps are as follows: Step 1-Steel pipe structure fabrication Assemble the vertical cross reinforcement, transfer plate and inner partition according to the drawing size and complete the Figure 3 Middle weld 1 welding.

[0020] According to the position of the cross reinforcement, the steel pipe outer wall is laid out and grooved using a semi-automatic cutting machine. A groove is opened at the end of the groove in the length direction to facilitate welding of the cross reinforcement to the end of the steel pipe. The groove width is 6mm wider than the cross reinforcement on each side to serve as the welding gap. The groove is a 45° welding groove, and a pad is added to the inner wall to achieve full penetration of the weld.

[0021] Then insert the cross reinforcement and the partition into the steel pipe as a whole, and complete the Figure 4 Middle weld 2 welding. Final completion Figure 5 Assembly and welding of external reinforcement of steel pipes.

[0022] Step 2-Cross-stiffened box-type web structure fabrication Assemble and weld the vertical cross reinforcements and internal transverse partitions in the box structure. Figure 6 Then assemble the vertical cross stiffeners and partitions with the box column webs, and complete the Figure 7 Middle weld 5 weld.

[0023] Step 3-Steel columns form an integral connection Assemble the cross stiffener, the box web and the lower steel pipe into a whole. Figure 8 As shown, the welding of weld 6 positions is completed.

[0024] Then slot and assemble the box column cover to Figure 9 At the corresponding position, a gasket is added to leave a gap to complete the welding of the box flange plate and the conversion plate, that is, the weld at position 7.

[0025] Step 4-Welding of the inner partition and main weld of the box structure First, complete the weld between the vertical cross stiffener and the box cover. The welds are welded symmetrically from the middle to both sides, that is, the welds at position 8.

[0026] Then, the inner partition and the box cover are electroslag welded, that is, the weld at position 9. The cross-reinforced openings on both sides of the transverse partition are opened to allow the electroslag welding wall panels to be assembled smoothly. The thickness of the electroslag welding wall panels is 25mm, the assembly gap of the electroslag welding weld is between 24 and 26mm, the diameter of the electroslag welding rod steel pipe of the melting nozzle is 10mm, the diameter of the welding wire is 3.2mm, the welding current is 360~400A, and the welding voltage is 39~45V. The width direction of the component ensures that the electroslag welding on both sides of the inner partition is symmetrical, and the length direction ensures that the inner partition is welded symmetrically from the middle to both sides. Figure 10 shown.

[0027] Finally, the four main welds of the box body, namely the base, filling and cover welding, are completed in sequence, that is, the weld at position 10. During the welding process, it is also necessary to ensure that the welds are symmetrical and uniform to ensure that the welds meet the requirements of non-destructive testing and appearance.

[0028] The present invention develops an advanced, scientific and reasonable assembly and welding method, adopts the method of opening notches in the wall panels to achieve all-round welding of the wall panels and the internal cross reinforcements, and adopts the method of double-sided electroslag welding to achieve that all welds of the components are performed on the outside, which can control the overall dimensional deviation of the components within 1-2mm. Compared with the traditional method of welding personnel entering the interior to unassemble and unweld, it can effectively reduce production time costs, material costs, and labor costs, thereby reducing costs and increasing efficiency for enterprises, improving processing quality, and reducing safety risks.

[0029] The above are only embodiments provided for this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A method for processing and manufacturing a box-type steel pipe column, characterized in that It includes the following steps: Step 1: Fabrication of steel pipe structure: Assemble the vertical cross stiffeners with the transfer plate and inner partition, and cut grooves on the outer wall of the steel pipe to connect the cross stiffeners with the steel pipe; Step 2: Fabrication of cross-stiffener and box-type web structure: Assemble the vertical cross stiffeners and partitions with the box-type column webs and complete welding; Step 3: Steel columns are integrally connected: the cross stiffeners, the box webs, and the lower steel pipes are assembled into a whole and welded together; Step 4: Welding of the inner partition and main welds of the box structure: Complete the electroslag welding of the inner partition and the box cover, as well as the welding of the four main welds of the box.

2. A method for processing and manufacturing a box-shaped steel pipe column according to claim 1, characterized in that Step one is as follows: assemble the vertical cross reinforcement, transfer plate and inner partition according to the dimensions in the drawing, and complete the welds in sequence; lay out the position of the cross reinforcement to the outer wall of the steel pipe, use a semi-automatic cutting machine to groove the steel pipe wall plate, and open a groove at the end of the groove in the length direction. The groove width is 6mm wider than the cross reinforcement on each side to serve as the welding gap. The groove is a 45° welding groove, and a pad is added to the inner wall to achieve full penetration of the weld; then insert the cross reinforcement and the partition into the steel pipe as a whole, and complete the welds in sequence; finally, complete the assembly and welding of the external reinforcement of the steel pipe.

3. The method for processing and manufacturing a box-shaped steel pipe column according to claim 1 is characterized in that Step 2 is specifically as follows: assemble and weld the vertical cross stiffeners in the box structure together with the internal transverse partitions; then assemble the vertical cross stiffeners and partitions with the box column webs, and complete the welds in sequence.

4. The method for processing and manufacturing a box-shaped steel pipe column according to claim 1 is characterized in that Step three is as follows: assemble the cross stiffener together with the box web and the lower steel pipe into a whole, and complete the weld; then slot and assemble the box column cover to the corresponding position in the drawing, and complete the welding of the box flange plate and the conversion plate by adding a gasket and leaving a gap.

5. The method for processing and manufacturing a box-shaped steel pipe column according to claim 1 is characterized in that Step four is as follows: first complete the weld between the vertical cross reinforcement and the box cover, and the welds are welded symmetrically from the middle to both sides; then the inner partition and the box cover are electroslag welded, and holes are opened in the cross reinforcements on both sides of the transverse partition so that the electroslag welding wall panels can be assembled smoothly. The thickness of the electroslag welding wall panel is 25mm, and the assembly gap of the electroslag welding weld is between 24~26mm. The diameter of the steel pipe of the electroslag welding rod of the melting nozzle is 10mm, the diameter of the welding wire is 3.2mm, the welding current is 360~400A, and the welding voltage is 39~45V. The electroslag welding on both sides of the inner partition is ensured to be symmetrical in the width direction of the component, and the inner partition is ensured to be welded symmetrically from the middle to both sides in the length direction; finally, the four main welds of the box are completed in sequence: base, filling, and cover welding. During the welding process, it is also necessary to ensure that the welds are welded symmetrically and evenly to ensure that the welds meet the requirements of non-destructive testing and appearance.

Images