Effects of circular holes on the web warping of perforated blanks in flexible roll forming

Kang, Pilgyu; Woo, Young Yun; Moon, Young Hoon

doi:10.1177/0954405418805666

Cited by 3 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…25 The elements in the bending zone region were smaller than those in flange and web zones, because the bending zone goes through more deformation. 26…”

Section: Methodsmentioning

confidence: 99%

“…25 The elements in the bending zone region were smaller than those in flange and web zones, because the bending zone goes through more deformation. 26 The speed of forming in the simulation was defined as equal to that in experimental tests. However, the speed was low enough to perform the process in quasistatic mode.…”

Section: Finite Element Analysis Of the Cold Roll Forming Processmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of over-bending defect in the cold roll forming of U-channel section using experimental and numerical methods

Bidabadi

Naeini

Safdarian

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

In spite of product quality increase in the cold roll forming process by previous practical researches for defects prevention, there are some ill-considered defects such as over-bending, which diminished the product quality in the open section products of this process. This defect which happens by superfluous bending of sheet in the forming stand not only lead to defective products, but also trigger other defects such as edge wrinkling. Since in an elaborate process such as cold roll forming, forming parameters play an active role in defect prevention, the effect of some important parameters is investigated on the over-bending defect and product bending angle by doing 68 experimental tests and numerical simulations in the present study. The list of parameters which are investigated includes bend angle increment, flange width, strip thickness, radius of bend, strength of the materials, and inter-distance between successive stands. In addition, the reason behind the effect of each parameter on the accuracy of the bending angle is laid out. Results show that over-bending defect can be compensated or even eliminated by decreasing the bending angle in each stand, a technique called bending angle increment. Increasing the number of forming stands from two to five causes the over-bending to decrease from 6° to 0°. With bending angle increment being the most impactful factor, bending radius, flange width, and strip thickness have a decreasing impact on over-bending. This study also brings forward a reverse relationship between the strength of the material and the intensity of over-bending. The inter-distance between successive stands was found to have the least effect on over-bending. Results highlight the importance of pre-form rolls at the beginning of the roll forming line. Without the usage of pre-form rolls, the folding of strips on a 60° angle, cannot be done in one stand.

show abstract

“…25 The elements in the bending zone region were smaller than those in flange and web zones, because the bending zone goes through more deformation. 26…”

Section: Methodsmentioning

confidence: 99%

Section: Finite Element Analysis Of the Cold Roll Forming Processmentioning

confidence: 99%

Investigation of over-bending defect in the cold roll forming of U-channel section using experimental and numerical methods

Bidabadi

Naeini

Safdarian

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

“…An RV 37 (RV is a code of model) reducer mechanism is shown in Figure 6. We assume that (1) the designer has taken this RV reducer from a sketch, 38 (2) there is no previous case for reference, (3) the machining method 39 used to make the RV reducer is unknown and (4) the geometric information, the assembly relationship and the possible inspection method are known.…”

Section: Implementation and Case Studymentioning

confidence: 99%

A rule-based exclusion method for tolerance specification of revolving components

Zhao

Cao

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

This article proposes a novel method for tolerance specification on revolving components. The revolving parts are widely used and functionally important. An exclusion approach is introduced to construct a tolerance specification method. A functional analysis tool is developed to select features to be specified and to generate their datum reference frame. A set of rules are modelled to create suitable specification schemes. The independent axiom and entropy theory are applied for further specification refinement. A software application is developed, and an RV (RV is a code of model) reducer is used as a case study. A comparison with other specification methods is undertaken.

show abstract

Flexible 3D Profile Roll Forming Technology

Sun¹,

Sedlmaier

Guo³

et al. 2022

Springer Tracts in Mechanical Engineering

View full text Add to dashboard Cite

Effects of circular holes on the web warping of perforated blanks in flexible roll forming

Cited by 3 publications

References 27 publications

Investigation of over-bending defect in the cold roll forming of U-channel section using experimental and numerical methods

Investigation of over-bending defect in the cold roll forming of U-channel section using experimental and numerical methods

A rule-based exclusion method for tolerance specification of revolving components

Flexible 3D Profile Roll Forming Technology

Contact Info

Product

Resources

About