A parametric study on forming length in roll forming

Hong, Sukmoo; Lee, Seungyoon; Kim, Naksoo

doi:10.1016/s0924-0136(01)00711-7

Cited by 66 publications

(39 citation statements)

References 6 publications

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“…From the three dimensional finite element simulation of Bui and Ponthot (2008) it can be observed that the product quality of the rolled strip significantly depends on the yield limit and work-hardening exponent, this latter conclusion being close to the findings of Hong et al (2001). For the first time, Zeng et al (2009) introduced the response surface method to optimise the design of cold roll formed profiles.…”

Section: Introductionsupporting

confidence: 62%

“…Experiments using strain gauge rosettes showed an increase of longitudinal strain on the strip surface before each roll stand, and a drop after each roll stand, and a continuous increase in shear strain throughout the forming process. From their finite element work, Hong et al (2001) conclude that the work-hardening exponent has a significant effect on the forming length. The authors claim that a highly work-hardened strip has a shorter forming length, and an annealed strip has a longer.…”

Section: Introductionmentioning

confidence: 99%

“…Quach et al (2006) have numerically investigated residual stresses through the thickness of press-baked thin-walled sections, but only validated their finite element model by comparing outer surface and peak compressive stresses. It is very well understood that stainless steel can be work hardened as demonstrated by Hong et al (2001) and Kain et al (2004). Kumar et al (2004) and Milad et al (2008) state that for austenitic stainless steel unstable austenite partially transforms into martensite, greatly increasing the mechanical strength and hardness.…”

Section: Introductionmentioning

confidence: 99%

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Predicting plastic deformation and work hardening during V-band formation

Müller

Barrans

Blunt

2011

Journal of Materials Processing Technology

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V-Band Clamps are manufactured using a cold roll forming process consisting of six passes which plastically deform an initially flat strip by bending to produce the band's V-section. In this paper a new method of validating numerically predicted plastic deformation in a cold formed metal strip is presented. Tensile testing of samples of the band's material was used to obtain a direct link between plastic strain and work hardness of this particular material. Using this correlation, the equivalent plastic strain (PEEQ) values predicted by finite element simulations were converted into hardness values.These values were compared to experimental work, in which samples of each pass of the roll forming process were taken to determine the work hardness in the cross section of the V-band using a microhardness machine. The error in strain predicted by the numerical method and hardness obtained by testing was found to be between 0.4% and 16.9%. This error was mainly due to uncertainty in material properties and the accuracy of the measurement technique. Compared to the more classical approach of measuring strain distribution with strain gauges, this method is more precise and accurate, as it is able to pick up even small changes in strain distribution.

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Section: Introductionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Predicting plastic deformation and work hardening during V-band formation

Müller

Barrans

Blunt

2011

Journal of Materials Processing Technology

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“…The rigid plastic FEM is widely used for analyzing many processes, such as RF (Sheikh & Palavilayil, 2006;Hong et al 2001), tube forming (Ko et al, 2005), blanking (Hein et al, 2008), or forging (Kim et al 2009). Many RF programs have been built and used in RF industry as well as in many studies by this approach.…”

Section: Simulation Of Rf Process By General and Specific Analysismentioning

confidence: 99%

“…By specific analysis, the three dimensional rigid plastic FEM combines with the initial guessing algorithm is used (Sheikh & Palavilayil, 2006;Hong et al 2001) With the metal sheet, the general analysis considers almost all affecting factors, while specific analysis set condition on deformation of the sheet. In the cross section which perpendicular to the rolling direction, the general plane strain condition is used.…”

Section: Simulation Of Rf Process By General and Specific Analysismentioning

confidence: 99%

Different Methods in Analyzing Roll Forming Process of Automotive Component

Park¹,

Anh²

2010

DAAAM International Scientific Book 2010

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Roll‐Forming Design of Eco‐Friendly Stud using Finite Element Analysis

Sim

Lee

Keum

2015

steel research int.

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Recently, the eco-friendly stud obtained by expanding the sheared pattern of the web and by roll-forming the flange is going to prevail because of the scrapless manufacturing process. In order to design the shearing pattern for the eco-friendly stud, the finite element analysis and Taguchi method are employed. For the design of expanding process of sheared patterns, the whole roll-forming processes are simulated by finite element method. Six geometries are considered to see the durability and fire resistance of the dry wall, for which structural and thermal analyses are performed. For determining the best, the orthogonal array and smaller-the-better characteristics of the Taguchi method are utilized. As the roll gap of the upper-and-lower roll type causes flange buckling, the side roll type is adopted. The stress and strain distributions as well as the formed shape obtained from the finite element simulation are used for the successful design of the roll-forming processes. The material cost of the eco-friendly stud can be reduced, compared to the conventional stud. Moreover, the expanding process by side rolls shortens the length of the roll-forming process and minimizes the die cost.

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A parametric study on forming length in roll forming

Cited by 66 publications

References 6 publications

Predicting plastic deformation and work hardening during V-band formation

Predicting plastic deformation and work hardening during V-band formation

Different Methods in Analyzing Roll Forming Process of Automotive Component

Roll‐Forming Design of Eco‐Friendly Stud using Finite Element Analysis

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