An Alternate Method to Springback Compensation for Sheet Metal Forming

Siswanto, Waluyo Adi; Anggono, Agus Dwi; Omar, Badrul; Jusoff, Kamaruzaman

doi:10.1155/2014/301271

Cited by 15 publications

(14 citation statements)

References 21 publications

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“…This paper corresponds with the statement that springback phenomenon can currently be accurately analysed and compensated only on parts with a less complex shape. Through literature, most papers agree that various compensation strategies lead to an improvement in the inaccuracy by up to 70-80 % [10][11][12]. Similar but slightly better results have been achieved in the presented experiment.…”

Section: Comparison Of the Resultssupporting

confidence: 82%

Compensation of Springback in Large Sheet Metal Forming

2019

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A precise production of sheet metal parts has always been a main goal in press shops. Highest quality demands are required especially in automotive production. Unfortunately, even today, the production is not optimal due to an ineffective approach to the springback compensation. Springback results in geometrical shape inaccuracies of the obtained product. Based on the current approach, excessive time and financial costs emerge due to corrections on the press tools. However, these corrections do not always lead to a better accuracy of the stampings. The main objective of the research is to design a modified solution of the current approach. The modified solution is designed as a methodology with a focus on the analysis and compensation of the springback with a help of a numerical simulation. To achieve the main goal, smaller sub-goals are employed. These sub-goals, or rather experiments, mainly focus on parameters, which, more or less, influence the springback phenomenon. The designed methodology is verified with real car body parts and is carried out with a help of the department of the press tools design in ŠKODA AUTO, a.s. There, the methodology is used for improving the accuracy of the stamping process of the car body parts and for improving the quality of the final product.

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Section: Comparison Of the Resultssupporting

confidence: 82%

Compensation of Springback in Large Sheet Metal Forming

2019

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“…(16) with respect to K is calculated as According to the condition that the length of the center layer of the curved blank is constant before and after unloading, the relationship between the bending radius and the bending angle satisfies Combining Eqs. (14) and (18), and then…”

Section: Figure 4 Analytical Model Of V-free Bendingmentioning

confidence: 99%

“…Among them, the "Force Descriptor Method (FDM)" [12,13] and "Displacement Adjustment (DA) method" [1] have attracted researchers more attention for its directness and effectiveness. Recently, various methods have been reported based on the DA method or the FDM, such as the Smooth Displacement Adjustment (SDA) method and the Surface Controlled Overbending (SCO) method [14], the Accelerated Compensation (AC) method [15], the Comprehensive Compensation (CC) method [16], the Enhanced Displacement Adjustment (E-DA) method [17], the alternate Hybrid Method (HM) [18], the Discrete Curvature Adjustment (DCA) strategy [19], and the Sheet Elements Compensation (SEC) method [20]. Most of these methods are based on finite element simulation and focused on optimizing the compensation direction by the compensation factor as well as smoothing the plane by the function curve, to improve the compensation speed and convergence.…”

Section: Introductionmentioning

confidence: 99%

An Iterative Compensation Algorithm for Springback Control in Plane Deformation and Its Application

Wang

Zhai

2019

Chin. J. Mech. Eng.

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In order to solve the springback problem in sheet metal forming, the trial and error method is a widely used method in the factory, which is time-consuming and costly for its non-direction and non-quantitative. Finite element simulation is an effective method to predict the springback of complex shape parts, but its precision is sensitive to the simulation model, particularly material model and boundary conditions. In this paper, the simple iterative method is introduced to establish the iterative compensation algorithm, and the convergence criterion of iterative parameters is put forward. In addition, the new algorithm is applied to the V-free bending and stretch-bending processes, and the convergence of curvature and bending angle is proved theoretically and verified experimentally. At the same time, the iterative compensation experiments for plane bending show that, the new method can predict the next compensation value based on the springback of each test, so that the target bending angle with the error of less than ± 0.1% and the target curvature with the error of less than 0.5% are obtained after 2-3 iterations. This research proposes a new iterative compensation algorithm to predict springback in sheet metal forming process, where each compensation value depends only on the iteration parameter difference before and after springback for the same forming process of same material.

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“…described an alternate hybrid method which involved DA (displacement Adjustment ) method followed by SF( spring Forward) method. The springback shape and the target part were used to optimize the die surfaces compensating springback [35].…”

Section: Optimizationmentioning

confidence: 99%

A Review on Spring Back and Optimization Process

2018

IJMTER

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Abstract-Recently forming industries faces spring back drawback in forming process like cold drawing, sheet metal forming, bending etc. These forming process resulted permanent deformation by cold forming to create different shapes. Spring back defect taking place during the forming process has been emphasized. The solution to such defect problems was also given. Literature review shows that considerable amount of researches have been conducted in the field of material forming and spring-back optimization process. The present review focuses on the cold forming processes, spring back defect, factors affecting spring back, the various methods used to analyze and optimize the spring back free process. This review also opens future research work to get dimensional stability and least springback.

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An Alternate Method to Springback Compensation for Sheet Metal Forming

Cited by 15 publications

References 21 publications

Compensation of Springback in Large Sheet Metal Forming

Compensation of Springback in Large Sheet Metal Forming

An Iterative Compensation Algorithm for Springback Control in Plane Deformation and Its Application

A Review on Spring Back and Optimization Process

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