A processing technology for box-type steel components

Abstract

This application provides a processing technology for box-type steel components, including: S1, marking the inner partition; S2, spot welding the inner partition, temporarily welding various process partitions, pad strips, and column top sealing plates; S3, installing the two side webs to form a U-shaped column; S4, assembling the U-shaped column into a box-type component; S5, welding two electroslag welds on the partition; S6, using double-arc double-wire welding on the box-type component; S7, milling the workpiece; S8, sandblasting to remove rust from the component surface; and S9, painting. The key technical points are: by marking the inner partition before assembling the box-type component, using the wing plate as the base plate, and after installing the webs to form a U-shaped column and thus the box-type component, welding the relevant components and the main welds of the component using double-arc double-wire welding, and after milling the end faces of the box-type component, shot blasting and painting are performed. This ensures the overall structural coordination of the box-type steel component and helps improve its service life and structural strength.

Description

Technical Field

[0001] This invention belongs to the field of steel component processing technology, specifically a processing technology for box-type steel components. Background Technology

[0002] Steel structural members mainly refer to composite steel structural members made of steel plates, angle steel, channel steel, and I-beams, welded together with connectors to withstand and transfer loads. Steel structural member systems have comprehensive advantages such as light weight, factory manufacturing, quick installation, short construction period, good seismic performance, fast investment recovery, and low environmental pollution, making them widely used in the construction engineering field. Box-type steel members, as a type of steel structural member, have a box-shaped cross-section. When bridges have large spans, the box shape is a better structural form. Its closed thin-walled section has high torsional resistance, which is particularly advantageous for curved bridges and bridges constructed using cantilever construction. Both the top and bottom plates have large areas, effectively resisting positive and negative bending moments and meeting reinforcement requirements, exhibiting good dynamic characteristics and low shrinkage deformation.

[0003] The existing Chinese patent document publication number CN114043150A discloses a welding auxiliary equipment and its processing technology for box-shaped steel components. When processing box-shaped steel components, the construction drawings are first familiarized. According to the processing requirements of the steel components during welding, the design positions of each component of the box-shaped steel components are programmed in the control system, and the welding shrinkage allowance between each component is reserved. Then, the bottom plate, top plate, partition plate and side plate are beveled, corrected and leveled. Welding backing plates are installed on the side plates, tack welded and welded. Then the bottom plate and partition plate are welded together, the partition plate, bottom plate and web plate are welded together, the partition plate, side plate and top plate are welded together, and the welding of four longitudinal welds is carried out. Finally, the ends are milled flat.

[0004] However, in the process of implementing the above technical solution, the following technical problems were found:

[0005] Existing box-shaped steel components are processed through assembly, welding, and milling. The processing flow is relatively simple. Because the processing method is largely the same as conventional welding, the box-shaped steel components produced have low impact resistance, stress resistance, and service life. Summary of the Invention

[0006] To overcome existing shortcomings, this application provides a processing technology for box-type steel components. Before assembling the box-type component, lines are drawn on the inner partition, and the wing plate is used as the base plate. It is temporarily fixed by spot welding before formal welding. After the web plates are installed to form a U-shaped column and the box-type component is formed, the relevant components and the main weld of the component are welded by double arc double wire welding. Then, the end face of the box component is milled to remove the machining allowance, and shot blasting and rust removal are performed, followed by painting. This can improve the service life and structural strength of the box-type steel components. It solves the problem that the existing box-type steel component production and processing technology is largely the same as the conventional welding method, and the box-type components obtained after welding have low impact resistance, stress resistance and service life.

[0007] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0008] A processing technology for box-type steel components includes:

[0009] S1, Inner partition: Mark and position the inner partition;

[0010] Wing plate: with one wing plate as the base plate;

[0011] Assembly verification: Based on the positioning lines on the inner partition, verify the pre-assembly of the inner partition and the wing plate;

[0012] S2. Spot welding fixation: Place the inner partition, check the position and spot weld temporary welding, temporarily weld each process partition and column top sealing plate using the same process, and weld the pad strip.

[0013] S3, Web: Install the two webs to form a U-shaped column;

[0014] S4. Assemble box-shaped components: On the assembly machine, assemble the U-shaped columns into box-shaped components;

[0015] S5. Welding of partition plate seams: Welding two electroslag welds on the partition plate;

[0016] S6. Double-arc double-wire welding: Double-arc double-wire welding is used to weld the main weld of the box-shaped component.

[0017] S7. Milling: The workpiece is rotated to the end face for milling, and the end plate of the box-shaped component is milled to remove the reserved machining allowance.

[0018] S8. Shot blasting: The components are fed into a shot blasting machine and sandblasted to remove rust from the surface of the components.

[0019] S9. Coating: After shot blasting to remove rust, the surface of the component is coated with paint.

[0020] In one possible implementation, the length and width dimensions of the inner partition of the box-shaped component in S1 are accurate within ±3mm, and the diagonal error is 1.5mm. The machining allowance of the pad in the length direction of S2 is increased by 10mm from the theoretical dimension, and the machining allowance in the width direction is increased by 5mm from the theoretical dimension.

[0021] In one possible implementation, the welding method used in S3 is gas shielded welding with full penetration, and the welding work in S5 is carried out using a high voltage, low current, slow wire feeding arc ignition and combustion method.

[0022] In one possible implementation, in S6, argon arc welding is first used for the root pass, and submerged arc welding is used for the fill and cover passes. In S6, the web of the box-shaped component has a 35° welding bevel.

[0023] In one possible implementation, the tolerance between columns during the milling process in S7 should be positive, and the perpendicularity of the milled metal end face in S7 should be below 0.3mm, and the surface roughness Ra should be below 12.5.

[0024] In one possible implementation, the temperature of the paint spraying in S9 is between 5°C and 35°C, and the relative humidity is ≤85%.

[0025] In one possible implementation, the bottom of the inner partition and the wing plate in S1 and S2 are provided with two support rails, a plurality of pillow strips are fixedly connected between the bottom of the two support rails, a roller is assembled between the two support rails, a plurality of positioning components are provided on the top of the support rails, and a clamping component is provided inside the support rails.

[0026] In one possible implementation, the positioning component includes a vertical plate with multiple positioning holes machined inside. The multiple positioning holes are arranged in two rows, one above the other. A positioning rod is inserted into each positioning hole, and a control ring is fixedly connected to one end of the positioning rod.

[0027] In one possible implementation, the clamping assembly includes a clamping block, a round rod fixedly connected to one side of the clamping block, a prism rod fixedly connected to one end of the round rod, a limit plate fixedly connected to one end of the prism rod, and an external threaded seat slidably connected to the outside of the prism rod.

[0028] In one possible implementation, one side of the external threaded seat is fixedly connected to the support rail, the prism rod is movably connected to the inside of the support rail, the external threaded seat is connected to a control sleeve, the slot is machined inside the slot, and the limiting disc is rotatably connected to the slot.

[0029] The beneficial effects of this application are as follows:

[0030] 1. Before assembling the box-shaped components, lines are drawn on the inner partitions, and the wing plates are used as the base plates. They are temporarily fixed by spot welding before formal welding. After the web plates are installed to form U-shaped columns and box-shaped components, the relevant parts and main welds of the components are welded by double arc double wire welding. Then, the end faces of the box components are milled to remove machining allowances, and shot blasting and rust removal are carried out. After painting and spraying, the overall structure of the box-shaped steel components can be coordinated, which is conducive to improving the service life and structural strength of the box-shaped steel components.

[0031] 2. By cutting the inner partition plate out of the metal plate before welding the inner partition plate to the bottom plate, and deburring and grinding the surface and surrounding area of ​​the inner partition plate, the surface can be made smooth, which can ensure the quality of subsequent electroslag welding. After the welding work is completed, the service life of the box-type steel component can be guaranteed through anti-oxidation treatment.

[0032] 3. When assembling box-type components with the cover plate on, first mark the center line position of the drilling electroslag welding hole and mark it, and thoroughly clean the inside of the column. The spot weld should be processed at the bottom of the bevel on both sides to ensure welding quality and reduce welding defects.

[0033] 4. By ensuring that the inner and outer surfaces of the welding nozzle, welding wire, flux, and arc-starting agent are dry and clean, and by using welding eyepieces to observe the position of the welding nozzle in the molten pool during the welding process, ensuring that it is always in the center of the molten pool, and by constantly observing the degree of red-hotness of the outer base material, welding damage detected during subsequent UT flaw detection can be minimized, which is beneficial to ensuring welding quality.

[0034] 5. By alternating welding of the workpieces while keeping both sides synchronized, uneven welding shrinkage can be prevented from causing lateral bending and twisting, and the steel column can be prevented from twisting and deforming. When the welding work is completed, the welding effect can be checked by itself, and welding omissions can be filled to ensure welding quality.

[0035] 6. By controlling the column length tolerance to a positive value when the columns are joined together, the weld seam can be prevented from shrinking and deforming after compression due to the elasticity of the column.

[0036] 7. By roughening the surface with sandpaper during the coating process to remove dust and dirt before applying the next layer of coating, the adhesion between each layer of coating on the surface of the box-shaped steel component can be guaranteed, avoiding the situation where the interval between the previous layer of coating and the next layer of coating is too long, resulting in a weakening of the interlayer adhesion.

[0037] 8. By mounting the wing plate on top of the roller and controlling the threaded connection between the control sleeve and the external thread seat, the limiting plate moves inside the slot, which facilitates the control sleeve to push the prism rod to move the clamping block. The wing plate is clamped by the two clamping blocks coming close to each other. According to the marked position on the wing plate, the vertical plate is passed through the corresponding positioning hole. When the inner partition is inserted between two adjacent positioning rods, the inner partition can be positioned, which facilitates spot welding pre-fixing between the inner partition and the wing plate. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the working steps of the present invention;

[0039] Figure 2 This is a schematic diagram of the pre-assembled structure of the inner partition and wing plate of the present invention;

[0040] Figure 3 For the present invention Figure 2 Enlarged diagram of section A in the middle;

[0041] Figure 4 This is a schematic diagram of the positioning component of the present invention;

[0042] Figure 5 This is a schematic diagram of the clamping component of the present invention.

[0043] Reference numerals in the attached drawings: 1. Support rail; 2. Roller; 3. Clamping assembly; 31. Control sleeve; 32. Clamping block; 33. Round rod; 34. Slot; 35. Limiting plate; 36. External thread seat; 37. Prism rod; 4. Positioning assembly; 41. Vertical plate; 42. Positioning rod; 43. Control ring; 44. Positioning hole; 5. Pillar. Detailed Implementation

[0044] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0045] Example 1:

[0046] This embodiment describes a processing technology for box-type steel components. (See details below.) Figure 1 As shown, it includes:

[0047] S1. Using one wing plate as the base plate, mark the inner partition plate with lines for positioning and verify its accuracy.

[0048] S2. Place the inner partition, check the position and spot weld temporary welds. Use the same process to temporarily weld each process partition and column top sealing plate, and weld the pad strips.

[0049] Among them, the box-shaped component partition is assembled on special equipment to ensure its size, so that the length and width of the internal partition of the box-shaped component are within ±3mm and the diagonal error is 1.5mm;

[0050] Secondly, both ends of the pad in the length direction need to be machined, and the machining allowance is increased by 10mm on the theoretical size. On the width direction of the pad, one side needs to be machined, and the machining allowance is increased by 5mm on the theoretical size. The diagonal tolerance accuracy of the inner partition is required to be 3mm.

[0051] S3. Install the two side webs to form a U-shaped column, ensuring the width dimension of the U-shaped column;

[0052] First, one side flange plate is assembled, then the other side flange plate is assembled. After forming the U-shaped component, the component is flipped over and the partition plate is welded to the flange plate by gas shielded welding. The inner partition plate is also welded to the flange plate by gas shielded welding.

[0053] First, place the web plate on the roller conveyor of the production line. When hoisting, take care to protect the welding pad.

[0054] Secondly, the partition is positioned according to the markings on the box-shaped component partition, and clamped using the clamping cylinder on the U-shaped assembly machine;

[0055] Furthermore, the partition plates of the box-shaped components are positioned and welded to the web plate using gas shielded welding.

[0056] Furthermore, the two wing plates of the box-shaped component are placed on the raceway, and the ends of the three box-shaped component panels are aligned and clamped again with a hydraulic cylinder. Finally, the partition plate, web plate, and wing plate are tack welded to ensure the reliability of the tack weld.

[0057] In addition, if the column plate is spliced, the distance between the splice weld and the inner partition plate must be 20 times the thickness and >200.

[0058] S4. On the assembly machine, assemble the U-shaped columns into box-shaped components;

[0059] In some examples, the component is first flipped over and the top cover plate pad strip is welded, and then the weld on the other side is welded by gas shielded welding to complete the welding of the top cover plate, thus completing the assembly of the box-shaped component;

[0060] When assembling the cover plate, one end of the cover plate needs to be flush with the box-shaped component;

[0061] Secondly, during hoisting and assembly, special care should be taken to protect the welding pads on the cover plate;

[0062] Furthermore, when the hydraulic cylinder is lifting the workpiece, try to align the hydraulic cylinder with the partition and get close to the edge of the workpiece.

[0063] S5. The two electroslag welds of the welding partition are welded using a non-consumable electrode welding machine.

[0064] The welding process employs high voltage and low current, with slow wire feeding to initiate arc combustion.

[0065] Secondly, after the weld reaches 20mm, the voltage gradually drops to 38V and the current gradually rises to 520A.

[0066] S6. Use double-arc double-wire welding on the box-shaped components to ensure full penetration of the root of the weld, and use a double-wire double-arc welding machine to weld the main weld of the components.

[0067] During the welding process, GMAW welding is first used for the base coat, and SAW welding is used for the filler and cover coat.

[0068] Secondly, the initial plan for welding the box-shaped components is to cut a 35° bevel on the web and add a backing plate to the web. At the same time, in order to reduce the amount of welding deformation, it is necessary to weld both sides of the box-shaped components simultaneously.

[0069] S7. The workpiece is rotated to the end face for milling, and the end plate of the box-shaped component is milled to remove the reserved machining allowance, so that the surface of the component is exposed with a metallic luster.

[0070] During milling, it is necessary to first check whether the column body and the end mill are 90° to ensure the horizontal accuracy of the end face after processing. When milling one end of the box-shaped component, mill out the bevel angle and add a backing strip.

[0071] S8. The component is fed into a shot blasting machine to remove rust by sandblasting on the surface of the component, so that the cleanliness of the component surface reaches Sa2.5.

[0072] Among them, ferrous metal surfaces generally have oxide scale and rust, which must be removed before coating, otherwise the adhesion and service life of the coating will be seriously affected, resulting in economic losses.

[0073] Secondly, shot blasting (sandblasting) is used to remove oxide scale and rust, and to create a certain roughness on the metal surface, thereby increasing the adhesion between the coating and the metal surface.

[0074] Meanwhile, when using shot blasting for surface treatment, steel shot or similar materials are used as abrasives, and dry, clean compressed air at a pressure of 5-7 kg / cm² drives the abrasives to be sprayed onto the metal surface, which can remove the oxide scale and rust from the steel surface.

[0075] S9. After shot blasting to remove rust from the components, the surface is coated with paint.

[0076] Among them, paint spraying should be carried out when the temperature is between 5℃ and 35℃ and the relative humidity is ≤85%. At the same time, it should not be carried out in rainy, foggy and dusty conditions. If the substrate temperature is greater than 60℃, construction should be postponed.

[0077] Secondly, the time interval between surface rust removal and primer application should not exceed 6 hours, and the surface of the component should be kept clean and free from water and oil stains during this period.

[0078] By adopting the above technical solution:

[0079] The above design involves marking lines on the inner partition before assembling the box-shaped components, using the wing plate as the base plate, and temporarily fixing it with spot welding before formal welding to facilitate timely correction. After installing the web plates to form U-shaped columns and constructing the box-shaped components, the relevant parts and main welds of the components are welded using double-arc double-wire welding. Then, the end faces of the box-shaped components are milled to remove machining allowances, followed by shot blasting for rust removal and painting. This process can improve the service life and structural strength of the box-shaped steel components.

[0080] Example 2:

[0081] This embodiment describes a processing technology for box-type steel components. (See details below.) Figure 1 As shown, it includes: using a wing plate as the base plate, marking and positioning the inner partition, fitting the inner partition to the base plate, checking the position and spot welding temporary welding, temporarily welding each process partition and column top sealing plate using the same process, and welding the pad strip.

[0082] The inner partition is machined by cutting. After cutting, the four sides of the inner partition need to be cleaned of slag, oxide scale and burrs. After polishing with a grinder, the surface can be smooth, which can ensure the quality of subsequent electroslag welding. After the welding work is completed, anti-oxidation treatment can be carried out to ensure the service life of the box-type steel component.

[0083] Secondly, when welding the inner partition and the bottom plate, firstly, two pads on one side of the box-shaped component partition need to be fixed on the work platform, then the inner partition is placed in the center and spot welded for temporary fixation. Then, the two pads on the other side are placed on the inner partition and locked on both sides with cylinders. Then, the flat iron and web plate are welded using gas shielded welding and intermittent welding methods. The dimension between the outer sides of the two flat irons is increased by 2mm after the welding work is completed.

[0084] By adopting the above technical solution:

[0085] The above design, by cutting the inner partition plate out of the metal plate before welding the inner partition plate to the bottom plate, and by deburring and grinding the surface and surrounding area of ​​the inner partition plate, can ensure its smooth surface and guarantee the quality of subsequent electroslag welding. After the welding work is completed, the service life of the box-type steel component can be guaranteed through anti-oxidation treatment.

[0086] Example 3:

[0087] This embodiment describes a processing technology for box-type steel components. (See details below.) Figure 1As shown, the process includes: after the installation of the two side webs is completed and the U-shaped column is formed, when the U-shaped column is assembled into a box-shaped component on the assembly machine, it is necessary to first flip the component and weld the top cover plate pad strip, and then use gas shielded welding to fully penetrate and weld the other side weld to complete the welding of the top cover plate, thus completing the assembly of the box-shaped component.

[0088] Before covering the hole with the cover plate, the center line of the hole for electroslag welding must be marked and marked to ensure that the position is without deviation. At the same time, the inside of the column must be thoroughly cleaned to ensure that there are no foreign objects inside the column. During the welding process, in addition to ensuring that there are no foreign objects, the tack weld should be processed at the bottom of the bevel on both sides to ensure that the weld penetration is free of defects and the weld spot should not be too high.

[0089] By adopting the above technical solution:

[0090] The above design, by marking the center line position of the electroslag welding hole when assembling the box-shaped component with the cover plate, and thoroughly cleaning the inside of the column, ensures that the spot welds are processed at the bottom of the bevels on both sides, thus guaranteeing full penetration and leaving no defects.

[0091] Example 4:

[0092] This embodiment describes a processing technology for box-type steel components. (See details below.) Figure 1 As shown, this includes: welding two electroslag welds on the partition plate using a non-consumable electrode welder;

[0093] During the welding process, it is necessary to observe the degree of red-hotness of the base material at all times to control the size of the molten pool evenly. During this process, the molten pool must ensure complete penetration of the weld without burning through the base material. The position of the welding nozzle in the molten pool should be observed with a welding eyepiece to ensure that it is always in the center of the molten pool.

[0094] Secondly, during the welding process, it is necessary to ensure that the inner and outer surfaces of the welding nozzle, welding wire, flux, and arc-starting agent are dry and clean. After welding is completed, the arc-starting agent needs to be cut off, and the cap should be extended to perform UT flaw detection on the electroslag welds on both sides. At the same time, foreign objects such as welding slag in the welding area should be removed.

[0095] By adopting the above technical solution:

[0096] The above design uses welding eyepieces to observe the position of the welding nozzle in the molten pool during the welding process, ensuring that it is always in the center of the molten pool. It also allows for constant monitoring of the degree of red-hotness of the base material, thereby uniformly controlling the size of the molten pool, ensuring complete welding, and helping to guarantee welding quality.

[0097] Meanwhile, keeping the inner and outer surfaces of the welding nozzle, welding wire, flux, and arc-starting agent dry and clean during welding can minimize welding damage detected during subsequent UT flaw detection, thus helping to ensure welding quality.

[0098] Example 5:

[0099] This embodiment describes a processing technology for box-type steel components. (See details below.) Figure 1 As shown, this includes: using double-arc double-wire welding on box-shaped components;

[0100] Before double-arc double-wire submerged arc welding, the arc-starting plate and arc-extinguishing plate at both ends of the box column need to be positioned first. The bevel shape and plate thickness of the arc-starting plate are the same as those of the base material.

[0101] Secondly, the two main welds should be welded simultaneously, in the same direction, and with the same process parameters. For welds with a large plate thickness, multi-layer and multi-pass welding should be adopted according to the process requirements.

[0102] Meanwhile, during welding, the workpieces need to be flipped over and welded alternately to prevent excessive deformation. The components should always be in a horizontal state during the process to prevent the steel column from twisting and deforming. The welding process should always be synchronized on both sides to prevent uneven welding shrinkage and lateral bending and twisting. In the final stage, the welder's self-inspection welding is used to fill any omissions.

[0103] By adopting the above technical solution:

[0104] The above design prevents uneven welding shrinkage and lateral bending caused by alternating welding of the workpiece while maintaining synchronization on both sides, thus preventing excessive deformation. The components should always be in a horizontal state during the process to prevent the steel column from twisting and deforming. The welding effect can be automatically checked after the welding work is completed, and welding quality can be ensured after filling any welding omissions.

[0105] Example 6:

[0106] This embodiment describes a processing technology for box-type steel components. (See details below.) Figure 1 As shown, this includes milling the workpiece to the end face and milling the end plate of the box-shaped component to remove the reserved machining allowance.

[0107] Since the weld seam shrinks when the columns are joined together, and the columns also have elastic properties, they will deform after compression. Therefore, it is necessary to control the column length and take positive tolerance to ensure that the column top elevation meets the requirements after installation.

[0108] Secondly, during on-site installation, if it is found that the column length needs to be corrected, the requirements should be promptly reported to the factory so that the factory can make the processing adjustments. When milling the other end of the box-shaped component, its length dimension should be corrected before milling the two ends of the component. The perpendicularity of the end face needs to be kept below 0.3mm and the surface roughness Ra needs to be controlled below 12.5.

[0109] By adopting the above technical solution:

[0110] The above design involves milling the ends of the box-shaped components and correcting their length dimensions. The two end faces of the components are then milled. When the columns are joined together, the tolerance of the column length dimension needs to be controlled to a positive value. This can prevent the weld from shrinking and deforming after compression due to the elasticity of the columns.

[0111] Example 7:

[0112] This embodiment describes a processing technology for box-type steel components. (See details below.) Figure 1 As shown, this includes spraying paint onto the surface of the box-shaped steel components after welding.

[0113] Before spraying, the paint must be thoroughly stirred to ensure uniform mixing. During this process, it is necessary to strictly follow the mixing ratio, thinner, spraying pressure, coating interval and other parameters specified in the product instructions to ensure the adhesion, corrosion resistance and oxidation resistance of the mixed paint.

[0114] Secondly, when there is a long interval between the application of the previous coating and the application of the next coating during the spraying process, the surface should be roughened with wet sandpaper to remove dust and dirt before applying the next coating. This can ensure the adhesion between the coating layers on the surface of the box-shaped steel component after the coating is completed.

[0115] Meanwhile, the tools used for construction should be clean and dry, and the paint should not be mixed with water or other impurities. The paint must be mixed and used immediately and must be used up within 8 hours. Before the paint film dries, protective measures should be taken to prevent the paint from being contaminated by moisture and dust in the air.

[0116] In some examples, to ensure the thickness of the paint film at the edges and corners of the weld, a layer should be manually brushed before large-area spraying to fill the gaps and ensure the tightness of the subsequent paint layers.

[0117] By adopting the above technical solution:

[0118] The above design ensures the adhesion, corrosion resistance, and oxidation resistance of the mixed paint by strictly adhering to the mixing ratio, thinner, spraying pressure, and coating interval requirements specified in the product instructions during the paint spraying process. It also ensures thorough mixing of the paint to achieve uniformity. Furthermore, the paint is roughened with sandpaper during spraying to remove surface dust and contaminants before subsequent coats are applied. This process guarantees the adhesion between each paint layer on the surface of the box-shaped steel component and prevents weakened interlayer adhesion due to excessively long intervals between coats.

[0119] Example 7:

[0120] This embodiment describes a processing technology for box-type steel components. (See details below.) Figure 1 As shown, it includes two support rails 1, a plurality of pillow strips 5 are fixedly connected between the bottoms of the two support rails 1, a roller 2 is assembled between the two support rails 1, a plurality of positioning components 4 are provided on the top of the support rails 1, and a clamping component 3 is provided inside the support rails 1.

[0121] The positioning component 4 includes a vertical plate 41, and the interior of the vertical plate 41 is machined with a plurality of positioning holes 44. The plurality of positioning holes 44 are arranged in two rows, and the plurality of (42) are symmetrically arranged on both sides of (1).

[0122] Meanwhile, when the positioning rod 42 is inserted into the inside of the upper and lower positioning holes 44, so that the inner partition is located between the two positioning holes 44, the movement of the inner partition along the orientation of the wing plate can be restricted, and the wing plate is placed on top of multiple rollers 2, with the bottom end of the inner partition plate in contact with the surface of the wing plate.

[0123] Secondly, the clamping assembly 3 includes a clamping block 32. A round rod 33 is fixedly connected to one side of the clamping block 32. A prism rod 37 is fixedly connected to one end of the round rod 33. A limiting disk 35 is fixedly connected to one end of the prism rod 37. An external threaded seat 36 is slidably connected to the outside of the prism rod 37. When one side of the external threaded seat 36 is fixed to the support rail 1, the limiting disk 35 can move inside the slot 34 by adjusting the threaded connection between the control sleeve 31 and the external threaded seat 36. This facilitates the control sleeve 31 to push the prism rod 37 to move the clamping block 32. When the two clamping blocks 32 on both sides approach each other, the wing plate can be clamped on the top of the multiple rollers 2 to prevent the wing plate from tilting on the top of the rollers 2.

[0124] Meanwhile, when pre-fixing the inner partition according to the markings on the wing plate surface, the inner partition can move between the two positioning rods 42 without the need for precise control of the fixed position of the wing plate.

[0125] By adopting the above technical solution:

[0126] The above design, by mounting the wing plate on the top of the roller 2, controls the threaded connection between the control sleeve 31 and the external thread seat 36, so that the limiting plate 35 can move inside the slot 34, which makes it easy for the control sleeve 31 to push the prism rod 37 to move the clamping block 32. The wing plate is clamped by the two clamping blocks 32 approaching each other. According to the marked position on the wing plate, the upright plate 41 is passed through the interior of the corresponding positioning hole 44. When the inner partition is inserted between two adjacent positioning rods 42, the inner partition can be positioned, which makes it easy to spot weld pre-fix between the inner partition and the wing plate.

[0127] Meanwhile, when pre-fixing the inner partition according to the markings on the wing plate surface, the inner partition can move between the two positioning rods 42 without the need for precise control of the wing plate's fixed position. Spot welding is highly efficient in fixing the inner partition and the wing plate.

[0128] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A process for machining a box-shaped steel member, characterized by, A special tooling is used, which includes two support rails. Multiple bolsters are fixedly connected between the bottoms of the two support rails, and rollers are assembled between the two support rails. Multiple positioning components (4) are provided on the top of the support rails. A clamping component (3) is provided inside the support rail (1). The positioning component (4) includes a vertical plate (41), and multiple positioning holes (44) are machined inside the vertical plate (41). The multiple positioning holes (44) are arranged in two rows, and a positioning rod (42) is inserted into the positioning hole (44). A control ring (43) is fixedly connected to one end of the positioning rod (42). The clamping component (3) includes a clamping block. (32) A round rod (33) is fixedly connected to one side of the clamping block (32), a prism rod (37) is fixedly connected to one end of the round rod (33), a limit plate (35) is fixedly connected to one end of the prism rod (37), an external thread seat (36) is slidably connected to the outside of the prism rod (37), one side of the external thread seat (36) is fixedly connected to the support rail (1), the prism rod (37) is movably connected to the inside of the support rail (1), a control sleeve (31) is threadedly connected to the outside of the external thread seat (36), a slot (34) is machined inside the control sleeve (31), and the limit plate (35) is rotatably connected to the slot (34). The processing technology for the box-shaped steel component includes the following steps: S1, Inner partition: Mark and position the inner partition; Wing plate: Using a wing plate as the base plate, the wing plate is placed on the roller (2), and the clamping block (32) is driven by the rotation control sleeve (31) to clamp the wing plate; Assembly verification: Based on the positioning lines on the inner partition, verify the pre-assembly of the inner partition and the wing plate; S2. Spot welding fixation: Place the inner partition, check the position and spot weld temporary welding, temporarily weld each process partition and column top sealing plate using the same process, and weld the pad strips. S3, Web: Install the two webs to form a U-shaped column; S4. Assemble box-shaped components: On the assembly machine, assemble the U-shaped columns into box-shaped components; S5. Welding of the partition plate: Weld the two electroslag welds of the partition plate. During the welding process, keep the inner and outer surfaces of the welding nozzle, welding wire, flux and arc ignition agent dry and clean. Use the welding eyepiece to observe the position of the welding nozzle in the molten pool, so that it is always in the center of the molten pool. Observe the degree of red-hotness of the outer base material at any time to evenly control the size of the molten pool. S6. Double-arc double-wire welding: Double-arc double-wire welding is used to weld the main weld of the box-shaped component; first, argon arc welding is used for the root pass, and then submerged arc welding is used for the fill and cover passes; the web of the box-shaped component has a 35° welding bevel. S7. Milling: The workpiece is rotated to the end face for milling, and the end plate of the box-shaped component is milled to remove the reserved machining allowance. The perpendicularity of the milled metal end face is less than 0.3mm, the surface roughness Ra is less than 12.5, and the column-to-column joint tolerance is positive during the milling process. S8. Shot blasting: The components are fed into a shot blasting machine and sandblasted to remove rust from the surface of the components. S9. Coating: After shot blasting to remove rust, the surface of the component is coated with paint.

2. The processing technology for a box-type steel component as described in claim 1, characterized in that: The length and width dimensions of the inner partition of the box-shaped component in S1 are accurate within ±3mm, and the diagonal error is 1.5mm. The machining allowance of the pad in S2 in the length direction is increased by 10mm from the theoretical dimension, and the machining allowance in the width direction is increased by 5mm from the theoretical dimension.

3. The processing technology for a box-type steel component as described in claim 1, characterized in that: The welding method used in S3 is gas shielded welding with full penetration, and the welding work in S5 is carried out by high voltage, low current, and slow wire feeding arc ignition combustion method.

4. The processing technology for a box-type steel component as described in claim 1, characterized in that: The temperature of the coating spraying in S9 is between 5℃ and 35℃, and the relative humidity is ≤85%.

5. The processing technology for a box-type steel component as described in claim 1, characterized in that: Before welding the two electroslag welds on the S5 welding partition, the surface and surrounding area of ​​the partition are deburred and polished to ensure a smooth surface.

6. The processing technology for a box-type steel component as described in claim 1, characterized in that: When assembling box-shaped components in S4, first mark the center line position of the drilled electroslag welding hole and mark it, and thoroughly clean the inside of the column to ensure that the spot weld is processed at the bottom of the bevel on both sides.

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