Investigation on the Effect of Pre-heating with Butane Gas Torch in Formability of High Tension Steel (HTS) by Using Taguchi Experimental Method in Roll Forming Process

Kim, Dong-Hong; Darabi, Roya; Jung, Dong-Won

doi:10.1007/s12666-018-1319-7

Cited by 1 publication

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lindgren et al [28] used a prototype resistance heating machine to make the partial heating experiments, finding that the partially heated materials could be roll-formed to 120° without rupture while the unheated material could be roll-formed to 30° but ruptured in the bending zone at 60°. Kim et al [29] introduced a pre-heating using a gas torch and found that springback, bow, and buckling with the roll forming process involving pre-heating got improved by 0.97°, 0.17 mm, and 0.20, respectively, compared to the same CRF processes.…”

Section: Introductionmentioning

confidence: 99%

Optimization design of process parameters for cold and hot composite roll forming of the AHSS square tube using response surface methodology

Wang

Mehari²,

Wu³

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Advanced high-strength steel (AHSS) is a highly competitive material for the automobile industry to resolve the challenge of weight reduction and passenger safety. With the increase in strength, defects such as microcrack, local thickness reduction, and large corner radius in the corner section of cold roll-formed steel products become more and more serious. Cold and hot composite roll forming (CHCRF) is a newly developed manufacturing technology that combines the advantages of cold and hot forming to overcome the challenge of forming AHSS. In this paper, the mathematical models that represent the effect of line velocity, heating power, and deformation amount on the yield strength, outer corner radius, and microcrack length of the corner section of cold and hot composite roll-formed AHSS square tube are investigated by the response surface methodology (RSM) with Box-Behnken design (BBD). From the analysis of variance (ANOVA), it is found that all the three process parameters play a significant role in the outer corner radius and microcrack length, while the line velocity and heating power influence the yield strength significantly. Furthermore, an optimization process is proposed, with the outer corner radius and microcrack length as objective functions and the yield strength as a constrained condition, to manufacture the AHSS square tube with a small outer corner radius and no microcrack defect.Experimental verification has been conducted using the optimal process parameters, and the average magnitude of error is about 5 %, which implies that the optimization design is accurate and reliable.

show abstract

Section: Introductionmentioning

confidence: 99%