A method for forming and controlling a special-shaped curved panel unit

Abstract

The present invention discloses a method for forming and controlling a special-shaped curved panel unit, including automatic unfolding of curved wall panels, curved surface forming, and inspection steps. The present invention selects the curved surface unfolding function in the CATIA sheet metal module, and only needs to define the boundary to unfold the steel plate, and simultaneously lay out the openings in the unfolded plate, which is easy to operate; the curved panel is processed and manufactured by mechanically coordinating a strip mold and a rounding machine, which effectively meets the processing requirements of the curved panel; the surface processing status is checked during the process by adopting a general tool for curved surface forming detection, and the accuracy control during the process is effectively performed; compared with three-dimensional scanning measurement, the detection method is short in time, easy to use, and saves a lot of verification time; the device is simple and the cost is low; in view of the different special-shaped curved surfaces in the on-site space, the cross-sectional curvature measured by this tool plays a very important role in improving construction efficiency and saving costs, and the accuracy meets the construction requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure bridge construction engineering, and more specifically, to a method for forming and controlling a special-shaped curved panel unit. Background Art

[0002] Modern steel bridges must not only meet structural strength, stiffness, and durability requirements, but also aesthetics. Consequently, they often feature irregularly curved surfaces. This complexity makes machining the structural plate units difficult, and conventional methods often struggle to quickly and effectively verify the curvature of these units. Current construction practices place high demands on improving the precision and efficiency of forming irregularly curved plate units. Summary of the Invention

[0003] In view of the above-mentioned defects and problems in the prior art, the technical problem to be solved by the present invention is to provide a method for forming and controlling a special-shaped curved panel unit.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A method for forming and controlling a special-shaped curved panel unit comprises the following steps:

[0006] Step 1: Automatically unfold the curved wall panels. The full-bridge 3D model generated by the BIM software CATIA is divided into blocks and operated in CATIA. The surface unfolding function in the CATIA sheet metal module is used for the curved wall panels of a single segment. By defining the surface unfolding reference point and unfolding direction, the unfolded flat surface can be obtained. At the same time, the spatial position of the surface located at the absolute axis origin is generated. The surface is set with various necessary baselines according to the structural characteristics and construction process, including horizontal baselines, vertical baselines, and center lines. The software function module is used to transfer these marks along with the curved surface and mark them on the plate when the part is cut;

[0007] Step 2: curved surface forming. For the twisted wall panel unit, a strip mold is used for pressing and forming. Specifically, the mold is fixed on the movable workbench under the press, the die is fixed on the workbench, the steel plate is placed longitudinally on the die, and the steel plate is bent point by point and line by line. The advance distance of the steel plate each time and the density of the pressing points are selected according to the curvature radius of the steel plate. For the plate unit with a spatial shape curvature, a rounding machine is used for forming. Specifically, the steel plate is placed longitudinally in the rounding machine, the spacing between the three rollers of the rounding machine is adjusted, and the roller speed is controlled. The steel plate is first preliminarily rounded, and the rounding is repeated to gradually form the plate unit.

[0008] Step 3: Check and control. Use KATIA to intercept a specific horizontal or vertical cross-section surface and set the control point. After setting the same scale on both sides of the measuring ruler of the universal tool for steel plate curved surface forming inspection, place the tip of one side of the ruler at the control point. After adjusting the horizontal or vertical direction, extend the ruler at each measuring point in the middle for measurement. By comparing the measuring ruler with the reading value of the specific cross-section, determine the curvature difference and make control adjustments.

[0009] In the above technical solution, in step 2, the pressing is carried out while checking with a general curved surface forming detection tool. After the pressing is completed, the tire is hoisted to a special tire frame by a crane for comparison and fitting. If the forming is unqualified, it is returned for trimming and re-pressing until it passes the inspection.

[0010] The present invention uses the surface unfolding function in the CATIA sheet metal module, which only requires defining the boundary to unfold the steel plate, and at the same time, the openings in the plate can be laid out, which is easy to operate; the curved panel is processed and manufactured by mechanically coordinating the strip mold and the rounding machine, which effectively meets the processing needs of the curved panel, and the surface forming detection universal tool is used to check the surface processing status during the process, and the accuracy control during the process is effectively carried out. Compared with the three-dimensional scanning measurement, the detection method is short in time, easy to use, and saves a lot of verification time. The device is simple and the cost is low. Since the special-shaped curved surfaces in the on-site space are different, the cross-sectional curvature measured by this tool plays a very important role in improving construction efficiency and saving costs, and the accuracy meets the construction requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a schematic diagram of the use of general tools for steel plate curved surface forming inspection.

[0013] Figure 2 Schematic diagram of the surface forming equipment structure.

[0014] Figure 3 This is the surface unfolding diagram of the CATIA sheet metal module.

[0015] Figure 4 This is a schematic structural diagram of the surface forming equipment.

[0016] In the figure: universal inspection tool 1, hand hole 2, level bubble 3, measuring ruler 4, magnetic block 5, sleeve 6, bolt 7, curved wall panel 8, unfolded flat surface 9, press 10, strip mold 11, die 12, steel plate 13, rounding machine 14, roller 15. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "seat plate," "fixed support," "sliding support," "hydraulic assembly," "lifting lug," "limiting block," etc. should be understood broadly. For example, they can refer to fixed connections or arrangements, detachable connections or arrangements, or integral connections or arrangements. Those skilled in the art will understand the specific meanings of the above terms in this patent based on specific circumstances.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "up", "down", "vertical", "horizontal", "inclination", "connection", "movement", "lifting", "positioning", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] The full-bridge 3D model for this project was created using the BIM software CATIA. Similarly, the model was segmented within CATIA.

[0021] according to Figures 1-4 As shown, a method for forming and controlling a special-shaped curved panel unit as an embodiment includes the following steps: Step 1, automatic unfolding of curved wall panels, dividing the full bridge solid model generated by BIM software CATIA into blocks and operating in CATIA, selecting the surface unfolding function in the CATIA sheet metal module, importing the design model into CATIA, disassembling the design model through CATIA, and selecting the surface unfolding function in the CATIA sheet metal module for the curved wall panels of a single segment, and obtaining the unfolded flat surface (9) by defining the curved surface unfolding reference point and unfolding direction, and generating the spatial position of the surface positioned at the absolute axis origin at the same time, setting various necessary baselines for the curved surface according to the structural characteristics and construction process, including the horizontal baseline, the vertical baseline, and the center line, and determining the detection control base point, providing a theoretical point basis for subsequent detection, and using the software function module to transfer such marks following the curved surface, and marking them on the plate when the parts are cut;

[0022] After the steel plate (13) is transported to the location of the press (10) and the rounding machine (15), the press (10) is equipped with a strip mold (11) and the rounding machine (15) by means of a lifting device. Figure 1 Draw the control line and press each part to make it round at a fixed point. During and after the manufacturing process, use the general tool for curved surface forming detection (1) to detect the forming quality to ensure the forming quality. Specifically, it is step 2, curved surface forming. For the twisted wall panel unit, a strip mold is used for pressing and forming. Specifically, the mold is fixed on the movable workbench under the press, the die is fixed on the workbench, the steel plate is placed on the die longitudinally, and the steel plate is bent point by point and line. According to the size of the curvature radius of the steel plate, the forward distance of the steel plate each time and the density of the pressing points are selected; for the plate unit with a curved shape, a rounding machine is used to form it. Specifically, the steel plate is placed in the rounding machine longitudinally, the spacing between the three rollers of the rounding machine is adjusted, and the roller speed is controlled. First, a preliminary rounding is made, and the rounding is repeated to gradually form it; while pressing, the general tool for curved surface forming detection is used for inspection. After the pressing is completed, the plate unit is hoisted to a special tire frame for comparison and fitting. If the forming is unqualified, it is returned for repair and re-pressing until it passes the inspection.

[0023] Step 3: Check and control. Use KATIA to intercept a specific horizontal or vertical cross-section surface and set the control point. After setting the same scale on both sides of the measuring ruler of the universal tool for steel plate curved surface forming inspection, place the tip of one side of the ruler at the control point. After adjusting the horizontal or vertical direction, extend the ruler at each measuring point in the middle for measurement. By comparing the measuring ruler with the reading value of the specific cross-section, determine the curvature difference and make control adjustments.

[0024] The universal tool (1) for detecting curved surface forming includes a hand hole (2), a level bubble (3), a measuring ruler (4), a magnetic block (5), a sleeve (6), and a bolt (7). The universal tool (1) for detecting curved surface forming is fixed to a special-shaped curved panel unit via the magnetic block (5). The control section is accurately controlled by adjusting the level bubble (3), and the arc surface size is measured and controlled by adjusting the measuring ruler (4). The tool plays a very important role in improving construction efficiency and saving costs by measuring the curvature of the cross section, and the accuracy meets the construction requirements.

[0025] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for forming and controlling a special-shaped curved panel unit, characterized in that: The steps include: Step 1: Automatically unfold the curved wall panels. The full-bridge 3D model generated by the BIM software CATIA is divided into blocks and operated in CATIA. The surface unfolding function in the CATIA sheet metal module is used for the curved wall panels of a single segment. By defining the surface unfolding reference point and unfolding direction, the unfolded flat surface can be obtained. At the same time, the spatial position of the surface located at the absolute axis origin is generated. The surface is set with various necessary baselines according to the structural characteristics and construction process, including horizontal baselines, vertical baselines, and center lines. The software function module is used to transfer these marks along with the curved surface and mark them on the plate when the part is cut; Step 2: curved surface forming. For the twisted wall panel unit, a strip mold is used for pressing and forming. Specifically, the mold is fixed on the movable workbench under the press, the die is fixed on the workbench, the steel plate is placed longitudinally on the die, and the steel plate is bent point by point and line by line. The advance distance of the steel plate each time and the density of the pressing points are selected according to the curvature radius of the steel plate. For the plate unit with a spatial shape curvature, a rounding machine is used for forming. Specifically, the steel plate is placed longitudinally in the rounding machine, the spacing between the three rollers of the rounding machine is adjusted, and the roller speed is controlled. The steel plate is first preliminarily rounded, and the rounding is repeated to gradually form the plate unit. Step 3: Check and control. Use KATIA to intercept a specific horizontal or vertical cross-section surface and set the control point. After setting the same scale on both sides of the measuring ruler of the universal tool for steel plate curved surface forming inspection, place the tip of one side of the ruler at the control point. After adjusting the horizontal or vertical direction, extend the ruler at each measuring point in the middle for measurement. By comparing the measuring ruler with the reading value of the specific cross-section, determine the curvature difference and make control adjustments.

2. The method for forming and controlling a special-shaped curved panel unit according to claim 1, wherein: In step five, the pressing is carried out while checking with a general curved surface forming detection tool. After the pressing is completed, the tire is hoisted to a special tire frame by a crane for comparison and fitting. If the forming is unqualified, it is returned for trimming and re-pressing until it passes the inspection.

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