Flange Design Research Articles

Optimization of Flange Design for Engine Assembly Stand using RSM and NSGA-II Based on FEA Data

This article presents the results of a research study that focused on optimizing the flange design for engine assembly stands using the Response Surface Methodology (RSM) and Nondominated Sorting Genetic Algorithm II (NSGA-II) based on finite element analysis (FEA) simulation data. The study investigated the impact of three main dimensions (d1, d2, d3) of the flange as independent variables on the mass (m, kg), Von Mises stress (V, MPa), and displacement (D, mm) as dependent variables. The regression models developed using the RSM exhibited high R2 values of 0.9896, 0.998, and 0.9997 for m, V, and D, respectively. The multi-objective optimization results obtained through NSGA-II yielded 39 Pareto solutions, with d1 ranging from 10 to 27.43 mm, d2 ranging from 30 to 50 mm, and d3 ranging from 75 to 85 mm. These values corresponded to m values ranging from 2.93 to 7.58 kg, V values ranging from 54.8 to 342.6 MPa, and D values ranging from 0.006 to 0.270 mm. For verification purposes, Solution No.17 was selected. The results showed that the redesigned flange's mass, Von Mises stress, and displacement deviated by 0.95%, 2.28%, and 1.14%, respectively, from the optimal values obtained through the optimization process. These findings provide strong evidence for the high reliability of the optimization method employed in this study.

Optimization of reliability and sensitivity analysis for flange structures

The study delves into the reliability-driven optimization design of the flanges, drawing from reliability design theory, advanced optimization methodologies, and comprehensive sensitivity analysis. Flanges, integral to mechanical systems, demand precise design. Reliability design theory emphasizes consistent operation under diverse conditions. A novel approach to the flange-specific reliability sensitivity analysis method is central to this research. It promises to revolutionize flange design. By understanding the first two moments of core random parameters, we expedite reliability-driven optimization designs for mechanical connections. The programs enhance our approach, streamlining the pursuit of reliability-driven designs and providing rapid, accurate sensitivity analysis data for mechanical connections. This data offers critical insights into parameter influence, enabling targeted design adjustments. In summary, this research represents a significant advancement in mechanical engineering. By integrating reliability design theory with cutting-edge methodologies, it promises to enhance the quality and reliability of mechanical connections, meeting the rigorous demands of contemporary engineering applications. This holistic approach will play a pivotal role in the future of mechanical component design.

Applicability study of mechanical multi-pipe connections for DEMO breeding blanket maintenance concept

Maintenance of DEMO breeding blanket includes the removal and replacement of plasma facing components, for example the breeding blankets (BB). For access, multiple coolant pipes need to be removed. As an option to reduce downtime and increase maintenance speed, a so-called mechanical multi-pipe connection (MPC) concept is developed to allow removal of multiple pipes at the same time using remotely operated mechanical connections. MPC is one promising candidate to allow fast remotely controlled opening and closing of multiple pipe connections by using flanges and bolts.Some major challenges for the application of MPC are highly constrained space on top of the BBs, accessibility for appropriate tools and homogenous distribution of sealing forces on the gaskets. Numerous studies on arrangement and force application methods were performed to identify suitable concepts – of which a compact flange design using direct bolted connection is favourable. Finite Element Analyses on the shape and geometry optimization of the MPC led to analytically verified solutions. Furthermore, material selection and behaviour under radiation, vacuum, and thermal cycling at high temperature conditions requires advancement of available material treatment solutions in terms of things such as coated surfaces of threads and contact areas on flanges to avoid diffusion bonding.

Diverse Labial Flange Designs to Accomplish Lip Aesthetics in Conventional Complete Denture Prosthesis

Diverse Labial Flange Designs to Accomplish Lip Aesthetics in Conventional Complete Denture Prosthesis

Design and experimental research of UHV flanges for the Hefei Advanced Light Facility

The Hefei Advanced Light Facility (HALF) is a diffrac-tion-limited storage ring (DLSR) light source based on the compact multi-bend achromat (MBA) lattice. There-fore, the gaps between those focusing magnets are small. The commonly used ConFlat® flange, with a large axis dimension, is not suitable for the compact lattice in HALF. In this work, a stainless steel tapered flange fas-tened by a chain clamp has been designed for its smaller axis dimension. Two types of sealing structures are used, which are knife-edge and spring-energized metal C-ring structures, respectively. The copper gaskets with and without silver coating are used for knife-edge flange, respectively. Besides, the spring-energized metal C-ring is manufactured by SUS 304 with a tin layer of 50 μm. These flanges and chain clamps were made of SUS 304, and their vacuum properties were tested. The results indi-cate that these UHV flanges can meet the demands for the vacuum system of HALF.

Investigations on Integrated Funnel, Fan and Diffuser Augmented Unique Wind Turbine to Enhance the Wind Speed

Wind energy is an alternative future energy to fossil fuels since it is abundant and green energy. As a result, high performance unique design is proposed that has a diffuser augmented wind turbine including intake funnel with guide vanes, natural fan, straight flow section, exit splitter with air openings and end flange. This proposed design is called as Integrated omni-directional Intake funnel, Natural fan, Straight diffuser, Splitter and Flange (I2NS2F) Design. To construct this I2NS2F configuration, four distinct wind turbines were developed: a) bare wind turbine, b) wind turbine diffuser design with single rotor turbine, c) bend diffuser, intake funnel, natural fan, splitter and flange and d) I2NS2F design. The proposed designs are numerically studied using MATLAB Simulink and Ansys Fluent. These designs are optimized by Random Search Optimization with Supervisory Control and Data Acquisition technique to evaluate the wind velocity and the performance is comparatively estimated. From this analysis, I2NS2F design achieves 53m/s of wind velocity at turbine region for 5.5m/s inlet wind and it could be considered as highest wind velocity than other three designs. It is evidently proved and concluded that proposed I2NS2F design augments natural wind, resulting in greater green power generation.

LONGITUDINAL COMPRESSION THERAPY FOR SMALL BOWEL STRICTURE CROHN'S DISEASE: DURABLE RESOLUTION IN SWINE MODEL

Abstract INTRODUCTION Small bowel stricture is common in Crohn’s disease (CD), both de novo and after resection. With all standard treatments having high recurrence rates, CD patients would benefit greatly from a novel and highly durable non-surgical intervention. We report the first long-term study of longitudinal compression therapy (LCT) for the treatment of anastomotic strictures in an animal CD stricture model. LCT entails progressive endoluminal compression of stricture tissue between two flange-like device components. The goal is to gradually bring about necrosis of fibrotic tissue interposed between the two flanges while allowing remodeling with minimal iatrogenic inflammation around the periphery. METHODS Stable anastomotic strictures with hallmarks of CD small bowel strictures were created in 6 pigs, using an established method entailing ileocolonic anastomosis creation with a bypassed ileal segment to maintain patency of the gastrointestinal tract followed by serial injections of phenol/trinitrobenzenesulfonic acid at the anastomosis site. Instead of using LCT devices deployed wholly endoscopically, to best study stricture response to LCT in this model, we used devices with magnetic elements for compressive force generation and integrated ultraminiature sensor arrays for monitoring treatment progression; one 23 mm diameter device component was placed via a surgical enterotomy and a second was deployed endoscopically. Animals were followed for 9 weeks after LCT to gauge post-treatment stricture response. RESULTS LCT device placement was successful in all animals. Five animals reached the 9-week timepoint. One animal was sacrificed on day 12 due to urinary tract complications unrelated to the device. The initial therapeutic response took place over a 3-hour period after device placement, with LCT devices applying increasing force from 3 to 10 Newtons. In endoscopic assessments, widened lumens were noted, with openings 3.3-fold larger at 2 weeks and 3.7-fold larger at 9 weeks. In comparison, for endoscopic balloon dilation in the same animal stricture model, the openings were 2.3-fold larger at 2 weeks, declining to 1.9-fold at 9 weeks. Endoscopic and macroscopic evaluation after euthanasia demonstrated newly patent lumens after excision of stricture tissue, with healthy-appearing mucosa and no macroscopic findings of stricture. CONCLUSION Prior work by our group and others--in animal models and in a small number of treated patients--has provided favorable indications of efficacy of LCT for treating refractory strictures. To the best of our knowledge, this is the first study to include long-term follow-up of LCT in a validated animal model of Crohn’s stricture. This work provides strong preliminary support that LCT’s combination of resection and neo-epithelialization can durably resolve CD stricture. LCT clinical studies are planned as a next step. Design and operation of device systems for longitudinal compression therapy for small bowel stricture in Crohn’s. (a) Longitudinal compression therapy device systems incorporate a dual-flange design, with a mechanism for drawing the flanges together to longitudinally compress the stricture. For single-sided access, expanding flange designs can be used (inset, top left). The LCT device systems used in this study are pairs of discrete non-expanding flange components, with one flange component placed proximal to the strictured region via laparotomy; magnetic elements in the flange components supply the compressive force. This design facilitates incorporation of ultraminiature sensor arrays into the flange components for monitoring stricture response to treatment (inset bottom right). (b)-(d) Steps in longitudinal compressive therapy: (b) advancing the LCT device through the stricture; (c) stricture compression between distal flange and expanded proximal flanges; (d) completion of therapy. Representative result for LCT in the porcine model of Crohn’s small bowel stricture. (a) Before treatment, a length of bowel 15 mm long is badly strictured, with the lumen less than 10 mm at its narrowest point. (b) At 2 weeks after LCT treatment, the narrowest point is markedly larger. (c) At 9 weeks post LCT treatment—a time after which balloon dilated strictures tend to have recurred—the LCT treated stricture is even more open than at 2 weeks post, consistent with the LCT intervention having spurred healing instead of exacerbating fibrosis. Three-dimensional anatomy of strictured segments determined by impedance-based measurement (Endoflip, Medtronic).

Gap height prediction for bolted ring flange connections based on measurements

AbstractWind turbine towers and their flange connections are highly fatigue loaded structures. Previous investigations have shown that initial parallel gaps between L‐flange connections, which are resulting from their respective flatness of the contact surfaces, can increase fatigue loads of the connecting fasteners significantly. Flange flatness and/or gap sizes in between flanges must comply with limitations given in relevant standards and therefore must be measured after the manufacturing process and/or during installation. More than 1900 flatness measurements of several offshore wind projects were collected and used to determine initial gaps between flanges analytically. A statistical evaluation allows to determine the distribution of expected gap sizes. The increase of gap height with increasing gap length can be described with linear correlations. Furthermore, the distributions of gap heights are approximated with log‐normal distributions. Parameters for generic log‐normal distributions are derived considering all performed mating simulations. Following the described methodology, gaps can be determined from any large number of flatness measurements. It is proposed to consider the results for flange design.

MPEX High Heat Flux Plasma Dump Design, Manufacture, and Articles Test

The Material Plasma Exposure eXperiment (MPEX) device is a steady-state linear plasma device currently in the final design phase at the Oak Ridge National Laboratory. This device will reach ion fluences up to <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$10^{31}\,\,\text{m}^{-2}$ </tex-math></inline-formula> and will be used to expose neutron-irradiated materials to divertor-relevant plasmas and to study the effects of plasma-material interactions. These studies will elucidate the complex effects of plasmas with divertor candidate materials capable of withstanding high heat flux and high fluences for next-generation fusion devices. Bidirectional plasma will be generated using a high-power (200 kW) helicon source. Plasma will be confined by superconducting magnets. The last plasma-facing component on the upstream side of the MPEX device is the dump, which has been designed to intercept plasma and energetic particles. The dump will have a total heat load of 9.2 kW. A copper alloy (Glidcop AL-15) was selected for use in the water-cooled flange design because of its high thermal conductivity, its retaining strength at elevated temperatures, and its ability to be used in the high-temperature braze joints used in this application. Titanium-zirconium-molybdenum (TZM) tiles are brazed to the Glidcop AL-15 flange using high-temperature braze alloy. External water-cooling channels are used on the dump flange to prevent water leakage inside the vacuum space. This article discusses the details of the high heat flux dump design, including the computational fluid dynamics (CFD) and structural analyses performed to validate the design to meet the operational requirements of the MPEX device.

Shear mechanism and design of small-scale tubular flange corrugated web girders

This paper explores numerically the shear behaviour and web strength of a new type of corrugated web girders (CWGs) consisting of an upper tubular flange, a corrugated web and a lower flat plate flange. The current finite element (FE) models, simulate by ABAQUS software, are validated using the results of three new small-scale experimentally tested girders that have been recently published by the authors. Three main points are studied in this paper, namely the propagation of the plastic shear hinges (PSHs), the effect of the corrugation wavelength and the development of a new elastic design model for the girders. First, the girders are simulated to unveil their shear failure mechanism, focusing on the propagation of the plastic shear hinges (PSHs) that characterise the shear failure of conventional flat-webbed girders. Through comparisons between the tubular flange CWG and the corresponding CWG with flat plate flanges (called hereafter as the conventional CWG), it is found that PSHs occur in the lower flange of former girder at the ultimate load whatever the type of the shear buckling is, while the later does not show PSHs for cases failing by local or interactive buckling. The effect of the wavelength of the corrugation of the tubular flange CWG is secondly analysed and the results show that as the corrugation wavelength decreases, the shear capacity increases with the local shear buckling or interactive shear buckling, but this rule is not suitable for the global shear buckling mode. Finally the shear ratio of the tube to that of the entire cross-section is derived and the shear strength equation of the tubular flange CWG is provided and verified through comparisons with test results.

Design of Wideband OMT Choke Flanges for Low PIM Satellite Communication Applications

In this article, two wideband choke flanges (Flange 1 and Flange 2) are designed to reduce the passive intermodulation (PIM) level of the orthmode transducer (OMT). Since flange connections are important sources of PIM, circular Flange 1 introduces a choke groove and achieves a power suppression level of 41.95 dB. To meet the requirement of miniaturization and lightweight, Flange 2 with rectangular structure and rectangular choke groove is proposed for reducing height waveguide. Compared with conventional circular choke flange for reduced height waveguide, it has a smaller cross area and better power suppression level (39.92 dB). To evaluate the PIM performance of the proposed OMT with two flanges, temperature circulation test is executed. It is proved that the third-order PIM level is about −135 dBm from measurement results. Therefore, the proposed flanges can be utilized in large-scale multibeam array for low PIM satellite communication applications.

Modeling and analysis of integrated wheel hub

Abstract The main objective of the hub is to act as a support structure to the entire wheel assembly of the vehicle. It is designed to absorb and dissipate the kinetic energy from the impact on the tire. This paper discusses an idea for optimizing the wheel assembly by redesigning, validating the design through analysis, material selection and overall weight reduction. The design optimization is done while taking in consideration of the design constraints, factor of safety (FOS) and manufacturability through conventional means. Weight reduction in the wheel assembly will help improve the suspension performance. The research is based on integrating parts of the wheel assembly for weight reduction, performance optimization and ease of assembly. The proposed design of wheel flange will be followed by material selection for attaining an adequate FOS and wear strength.

Digital Twins Model of Industrial Product Management and Control Based on Lightweight Deep Learning

Digital twins (DTs) can realize the integration of information and entities. It is widely used because of its simulation characteristics and virtual reality (VR) mapping. Its application to industrial product management and control is explored. First, the concept and the functions in different stages of DTs are expounded. Second, the Workench simulation platform and SolidWorks software are applied in the design of the aluminum alloy flange according to DTs in the design stage of industrial product management and control. Third, the role of DTs in industrial product management and control is confirmed through a comparative experiment. Finally, an intelligent algorithm for the automatic identification of internal defects is designed based on lightweight deep learning to improve the efficiency of ultrasonic detection. The results show that the accuracy of the lightweight convolution neural network (CNN) is 94.1%; the model size is 2.9 MB; the network is more lightweight and has an excellent performance in ultrasonic defect detection; the nonlinear finite element analysis results and the test results are consistent. Therefore, it is proved that the finite element analysis method is reliable and helps to improve the efficiency and shorten the design cycle. The emergence of DTs provides a technical scheme for product management and control under the three-dimensional model.

Realization of Parameterized Serialization Design of Flanges in Chemical Equipment

Flanges are important parts in the fields of machinery, chemicals, wind power, and sewage treatment. They are used in large quantities and have formed a series of products at present. In the paper, the secondary development of AutoCAD was adopted to parameterized series design, and 960 parts from 4 series flange (plate flat welding flange, neck flat welding flange, neck butt welding flange, socket welding flange) were drawn. The efficiency of part design has been significantly improved.

Experimental and numerical investigation of prefabricated prestressed vertical steel strand core tube flange column connection joint

The core tube flange column joint is proposed to avoid field welding of traditional steel structures and to realize remote processing and efficient assembly. However, when the story drift is large, the joint will produce large deformation, and the flange bolt will be broken. Thus, in the present study, a prestressed vertical steel strand core tube flange column connection joint and design criteria were proposed to limit the large deformation at the flange connection. Both proposed prestressed vertical steel strand core tube flange column joint and core tube flange column connection joint were analyzed under low cycle reciprocating loading tests. It was found that the vertical steel strand can improve the hysteretic performance and ductility of the joint. Also, the vertical steel strand can increase the synergistic performance of the column connection joint, which changes the failure mode of the vertical steel strand. Based on the test results, the mechanism of the prestressed vertical steel strand core tube flange column joint was analyzed, and an effective numerical model for the joint was established. The analysis of the joints with different initial steel strand forces showed that increasing the initial short strand force will limit the deformation at the flange connection. Although this restriction has little impact on the joint's bearing capacity, it greatly impacts the strain at the column foot. Based on the numerical analysis, an optimal initial short strand force was obtained, which could provide a reference for engineering design. Note that the prestressed vertical short strand core tube flange column connection joint has excellent mechanical performances, breaking through the key technology of non-welded connection of vertical members. This proposed connection joint can achieve efficient assembly in practical engineering applications and realize the design goal of “strong joint, weak member”

COMPUTER SIMULATION AND EXPERIMENTAL ANALYSIS OF ULTRAHIGH VACUUM CF FLANGE JOINTS APPLIED IN THE ACCELERATOR AND SPACE TECHNOLOGY

Computer simulation and experimental research of ultrahigh vacuum CF flange joints are widely used in accelerator and space technology have been carried out. The computer simulation was carried out in the automated software environment "ABAQUS", which allowed to study the stress-strain state in the sealing zone. The novelty of the work lies in taking into account the certified (real) hardening curve of the flange material during simulation since the work carried out before that was performed for an ideal rigid (nondeformable) flange, which introduces significant inaccuracies in calculations. Two of the most famous CF flange designs of Wheeler and CERN are simulated. Zones of distribution of intensity of stresses and strains, as well as components of the stress state are obtained. The experiments were carried out in four cycles of assembly and disassembly of the flange joint (with a change of the copper ring after each cycle) using standard flanges and gaskets. Also, to eliminate statistical inaccuracies, each experiment was carried out repeatedly to clarify all the measured parameters. A comparative analysis of the results of simulation and experiments is performed. The obtained data are close both qualitatively and quantitatively, which makes it possible to use them both for practical and research purposes.

The Influence of Wheel Rotations to the Lateral Runout of a Hybrid Material or Dimensionally Reduced Wheel Bearing Flange

&lt;div class="section abstract"&gt;&lt;div class="htmlview paragraph"&gt;The automotive industry is continuously striving to reduce vehicle mass by reducing the mass of components including wheel bearings. A typical wheel bearing assembly is mostly steel, including both the wheel and knuckle mounting flanges. Mass optimization of the wheel hub has traditionally been accomplished by reducing the cross-sectional thickness of these components. Recently bearing suppliers have also investigated the use of alternative materials. While bearing component performance is verified through analysis and testing by the supplier, additional effects from system integration and performance over time also need to be comprehended.&lt;/div&gt;&lt;div class="htmlview paragraph"&gt;In a recent new vehicle architecture, the wheel bearing hub flange was reduced to optimize it for low mass. In addition, holes were added for further mass reduction. The design met all the supplier and OEM component level specifications. Vehicle testing, however, revealed that the wheel bearing developed high assembled lateral runout (ALRO) and judder. This was due to the tires and wheels being rotated multiple times during a durability schedule. Excessive ALRO will generate high disc thickness variation (DTV) which will lead to pulsation or judder complaints.&lt;/div&gt;&lt;div class="htmlview paragraph"&gt;The root cause of the vehicle level judder was determined to be caused by excessive ALRO and DTV in the brake corner. The major contributor to this LRO issue was plastic deformation of the bearing wheel flange that occurred with use and multiple tire/wheel rotations.&lt;/div&gt;&lt;div class="htmlview paragraph"&gt;This vehicle was validated in multiple regions of the world. Regional differences in vehicle service procedures were observed on the same architecture. Further investigation showed that the regions which performed more wheel rotations and other maintenance observed the vehicle judder, while the other region that did less maintenance did not.&lt;/div&gt;&lt;div class="htmlview paragraph"&gt;To better understand the effect of bearing wheel flange geometry on ALRO in this condition, a lab evaluation was performed. Multiple wheel flange designs were evaluated, including bearing designs with different wheel flange thicknesses and versions with and without weight saving holes. Additionally, bearings with a hybrid aluminum/steel wheel flange were tested.&lt;/div&gt;&lt;/div&gt;

Potential of surrogate modelling in compressor casing design focussing on rapid tip clearance assessments

ABSTRACTLosses induced by tip clearance limit decisive improvements in the system efficiency and aerodynamic operational stability of aero-engine axial compressors. The tendency towards even lower blade heights to compensate for higher fluid densities aggravates their influence. Generally, it is emphasised that the tip clearance should be minimised but remain large enough to prevent collisions between the blade tip and the casing throughout the entire mission. The present work concentrates on the development of a preliminary aero-engine axial compressor casing design methodology involving meta-modelling techniques. Previous research work at the Institute for Turbomachinery and Flight Propulsion resulted in a Two-Dimensional (2D) axisymmetric finite element model for a generic multi-stage high-pressure axial compressor casing. Subsequent sensitivity studies led to the identification of significant parameters that are important for fine-tuning the tip clearance via specific flange design. This work is devoted to an exploration of the potential of surrogate modelling in preliminary compressor casing design with respect to rapid tip clearance assessments and its corresponding precision in comparison with finite element results. Reputed as data-driven mathematical approximation models and conceived for inexpensive numerical simulation result reproduction, surrogate models show even greater capacity when linked with extensive design space exploration and optimisation algorithms.Compared with high-fidelity finite element simulations, the reductions obtained in computational time when using surrogate models amount to 99.9%. Validated via statistical methods and dependent on the size of the training database, the precision of surrogate models can reach down to the range of manufacturing tolerances. Subsequent inclusion of such surrogate models in a parametric optimisation process for tip clearance minimisation rapidly returned adaptions of the geometric design variables.

Experimental study on the hysteresis behavior of L-shaped double-skin composite wall with concrete-filled steel tubes

In this paper, the seismic behavior of L-shaped double-skin composite wall (DSCW) with concrete-filled steel tubes were investigated. The influence of different parameters, i.e., axial compression ratio, shear span-to-depth ratio, corrugation size, corrugated arrangement, flange size and CFST side column were discussed based on cyclic tests. The hysteresis behavior of DSCW specimens in terms of hysteresis curves, skeleton curves and rigidity deterioration were analyzed. The failure mechanism, as well as the composite effect between each component was also compared based on the strain analysis. It was concluded that the L-shaped DSCW has favorable seismic ductility and toughness with the maximum lateral drift angle of 3%. With the increase of axial compression ratio, the peak load of DSCW specimens increased while the post-peak ductility decreased. By contrast, the peak load of DSCW specimens decreased with the increase of shear span-to-depth ratio. More corrugations are effective to increase the seismic behavior of L-shaped DSCW and it was recommended that the corrugations should be arranged vertically. The flange size has limited influence on the failure processes and carrying capacity of DSCW specimens, while the stress distribution was highly dependent on the flange design of DSCW. The application of concrete-filled steel tubes (CFST) side column is effective to increase the seismic behavior of DSCW and also has significant influence on the composite effect between each component.

Forming the inner flange of a rib by pulsed-magnetic field pressure

Electromagnetic flanging is a hole-protrusion of parts, a potential technology for forming sheet aluminum metal, provides rigidity, allows positioning and fixing. This paper describes the behavior of a workpiece formed by an electromagnetic flanging, in which the initial blank of annealed aluminum alloy D16AM with a circular precut hole is formed into the first part of the inner flanging (as the first operation of manufacturing a part of the rib). The purpose of this article is to assess the ability of electromagnetic shaping to produce flanges for aircraft components and to study the forming process using numerical simulation. Design of electromagnetic flanges with some elementary geometric shapes, the purpose of which is to clarify a few geometric defects encountered and to propose some solutions. The numerical model of this part was developed in the LS-DYNA computing environment. An example of the numerical simulation of electromagnetic forming of the inner flange of a rib with the obtained shape of the workpiece mesh using a clamp is given. To avoid corrugation at the corner of the workpiece, the magnetic force was increased by reducing the area of the coil adjacent to the corner.