Bio: N.S. Sriram is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Bending of plates & Parametric statistics. The author has an hindex of 1, co-authored 1 publications receiving 8 citations.
TL;DR: In this paper, the fabricated stands of a three-roll heavy duty plate bending machine under load have been studied and a parametric study has been performed on them and the results showed that the performance of the machine stands in relation to various design- or structural-modification and arrive at a satisfactory design.
20 Aug 2007-World Academy of Science, Engineering and Technology, International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering
TL;DR: In this paper, the bendability analysis of heavy duty 3-roller plate bending machine has been studied and the effect of top roller offset on the bending ability at maximum top roller load imparting capacity is reported.
Abstract: Bendability is constrained by maximum top roller load imparting capacity of the machine. Maximum load is encountered during the edge pre-bending stage of roller bending. Capacity of 3-roller plate bending machine is specified by maximum thickness and minimum shell diameter combinations that can be pre-bend for given plate material of maximum width. Commercially available plate width or width of the plate that can be accommodated on machine decides the maximum rolling width. Original equipment manufacturers (OEM) provide the machine capacity chart based on reference material considering perfectly plastic material model. Reported work shows the bendability analysis of heavy duty 3-roller plate bending machine. The input variables for the industry are plate thickness, shell diameter and material property parameters, as it is fixed by the design. Analytical models of equivalent thickness, equivalent width and maximum width based on power law material model were derived to study the bendability. Equation of maximum width provides bendability for designed configuration i.e. material property, shell diameter and thickness combinations within the machine limitations. Equivalent thicknesses based on perfectly plastic and power law material model were compared for four different materials grades of C-Mn steel in order to predict the bend-ability. Effect of top roller offset on the bendability at maximum top roller load imparting capacity is reported.
TL;DR: In this paper, the fabricated stands, bed and ram of a medium tonnage mechanical press brake under load are studied. The results show that the stands, the bed and the ram are capable of handling a variety of bending operations on sheets of up to 6.5 mm thickness.
TL;DR: In this article, the major components of guillotine shears, including the side stands, bottom connecting plate, the hold-down, top connecting plate and the blade carrier, are examined critically for rigidity and strength, vibration characteristics, dynamic stresses and factor of safety whilst the shear is in operation.
TL;DR: In this article, the authors describe the problems faced by the steel industry as well as the necessary steps which should be taken for improvement of the productivity of STS machine and also it has made contribution to Bhilai Steel Plant by its growth and prosperity.
Abstract: Article history: Received 6 October, 2015 Accepted 23 April 2016 Available online 24 April 2016 Double-sided trimming shear machine is used for longitudinal both–sided trimming of steel plates and simultaneous scraping of trimmed edges at specific length. Side trimming shear (STS) executes the most vital role in increasing the productivity of plate mill and due to its feature, efficiency of plate mill division is enormously increases. In general, frequency of the occurrence of breakdown in STS machine is a most challenging task when STS performs side trimming and scrap cutting machining process. Bhilai Steel Plant (Steel Authority of India at Bhilai) in India is continuously facing a problem due to breakdown of STS machine. The use of separate knife for side trimming and scrap cutting reduces the possibility of scrap jamming which is a major reason for breakdown of STS machine. Researchers and practitioners also suggest the use of arc guillotine shear for side trimming and straight guillotine shear for scrap cutting for minimizing the breakdown in STS machine. The aim of this study is to describe the problems faced by the steel industry as well as the necessary steps which should be taken for improvement of the productivity of STS machine and also it has made contribution to Bhilai Steel Plant by its growth and prosperity. The methodology of study is purely qualitative and the results point out the problems, its implications, steps taken to improve the overall productivity of Bhilai steel plant. © 2016 Growing Science Ltd. All rights reserved.
TL;DR: In this article, the major components of guillotine shear, including the two side-stands, bottom connecting plate, hold-down and top connecting plate are examined critically for rigidity and strength whilst the shear is in operation.