A rapid calculation method for predicting roll deformation of six-high rolling mill

2018 ◽  
Vol 25 (9) ◽  
pp. 901-909
Author(s):  
Li Xie ◽  
An-rui He ◽  
Chao Liu
Keyword(s):  
Calculation Method ◽  
Rolling Mill ◽  
Rapid Calculation ◽  
Roll Deformation

Research on Designing Optimum Asphalt Content of Asphalt Mixture by Calculation and Experimental Method

2011 ◽  
Vol 97-98 ◽  
pp. 23-27
Author(s):  
Wen Fang Liu ◽  
Hong Mei Li ◽  
Bei Ping Tian
Keyword(s):  
Experimental Method ◽  
Calculation Method ◽  
Asphalt Mixture ◽  
Test Efficiency ◽  
Marshall Test ◽  
Rapid Calculation ◽  
Asphalt Content ◽  
Hot Mixed Asphalt

In this paper, the initial asphalt content is estimated by the hot-mixed asphalt mixture rapid calculation method in condition that we have no information about the similar project, and five asphalt content are selected with regarding the estimated asphalt content as the middle value, then carries on the Marshall test. The optimuml asphalt content is very accurate by the calculation and experimental method, the method greatly improved the test efficiency.

A rapid stress calculation method for short flexspline harmonic drive

2019 ◽  
Vol 36 (6) ◽  
pp. 1852-1867 ◽  
Author(s):  
Shuang Wang ◽  
Gedong Jiang ◽  
Xuesong Mei ◽  
Chuang Zou ◽  
Xian Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Calculation Method ◽  
Circumferential Stress ◽  
Element Model ◽  
Analytical Relationship ◽  
Analysis Method ◽  
Content Type ◽  
Stress Calculation ◽  
Mechanics Analysis ◽  
Rapid Calculation

Purpose Because of the compact structure, short flexspline (FS) harmonic drive (HD) is increasingly used. The stress calculation of FS is very important in design and optimization of HD system. This paper aims to study the stress calculation methods for short FS, based on mechanics analysis and finite element method (FEM). Design/methodology/approach A rapid stress calculation method, based on mechanics analysis, is proposed for the short FS of HD. To verify the stress calculation precision of short FS, a complete finite element model of HD is established. The results of stress and deformation of short FS in different lengths are solved by FEM. Findings Through the rapid calculation method, the analytical relationship between circumferential stress and length of cylinder was obtained. And the circumferential stress has proportional relation with the reciprocal of squared length. The FEM results verified that the rapid stress calculation method could obtain accurate results. Research limitations/implications The rapid mechanics analysis method is practiced to evaluate the strength of FS at the design stage of HD. And the complete model of HD could contribute to improving the accuracy of FEM results. Originality/value The rapid calculation method is developed based on mechanics analysis method of cylinder and equivalent additional bending moment model, through which the analytical relationship between circumferential stress and length of cylinder was obtained. The complete three-dimensional finite element model of HD takes the stiffness of bearing into consideration, which can be used in the numerical simulation in the future work to improve the accuracy.

Rapid calculation of the pressures and clearances in rough, rolling-sliding elastohydrodynamically lubricated contacts. Part 1: Low-amplitude, sinusoidal roughness

2007 ◽  
Vol 221 (5) ◽  
pp. 535-549 ◽  
Author(s):  
C J Hooke ◽  
K Y Li ◽  
G Morales-Espejel
Keyword(s):  
Surface Roughness ◽  
Rough Surface ◽  
Perturbation Analysis ◽  
Curve Fitting ◽  
Calculation Method ◽  
The Third ◽  
Lubricated Contacts ◽  
Rapid Calculation ◽  
Low Amplitude ◽  
Rough Rolling

Surface roughness in elastohydrodynamically lubricated (EHL) contacts may have a significant effect on component life and there is a need to be able to assess its effects quickly. This article describes a rapid calculation method, which provides accurate results where the amplitude of the roughness is relatively low and which gives good indications of the likely behaviour for higher amplitudes. In the first part, the effect of low-amplitude, sinusoidal roughness is examined, and it is shown that the behaviour can, for any wavelength and roughness orientation, be characterized by three complex quantities. Calculation of two of these is straightforward; the third requires curve fitting to the results obtained using a perturbation analysis. Details of the process are given. The second part of the article discusses how these results can be used to predict the behaviour of any rough surface under rolling-sliding EHL conditions.

Rapid calculation method for wave-guide-immersed dielectric resonant frequencies

2006 ◽  
Vol 84 (4) ◽  
pp. 289-297 ◽  
Author(s):  
Rudolf Nistor ◽  
Emil Petrescu
Keyword(s):  
Experimental Data ◽  
Calculation Method ◽  
Analysis Procedure ◽  
Wave Guide ◽  
Resonant Frequencies ◽  
Dielectric Sample ◽  
Margin Of Error ◽  
Rapid Calculation ◽  
Electrical Permittivity ◽  
Good Agreement

A rapid calculation is used to obtain the resonant frequencies of a dielectric sample excited in a semi-infinite wave guide. An analysis procedure for a sample excited in a semi-infinite wave guide is carried out to show the effect of the sample's dimensions and electrical permittivity. The theoretical resonant frequencies of the resonators are predicted and compared with those measured. The theoretical values of the resonant frequencies are in good agreement with experimental data within a margin of error less than 8%. PACS Nos.: 32.30.Bv, 41.20.Jb

EFFECT OF ASYMMETRICAL STAND STIFFNESS ON HOT ROLLED STRIP SHAPE

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5734-5739 ◽  
Author(s):  
DIANYAO GONG ◽  
JIANZHONG XU ◽  
ZHENGYI JIANG ◽  
XIAOMING ZHANG ◽  
XIANGHUA LIU ◽  
...  
Keyword(s):  
Rolling Mill ◽  
Deformation Analysis ◽  
Rolled Strip ◽  
Force Distribution ◽  
Influence Coefficient ◽  
Single Wave ◽  
Hot Rolled Strip ◽  
Strip Shape ◽  
Roll Deformation ◽  
Hot Rolled

The difference of elastic springs between the operating side (OS) and driving side (DS) of rolling mill has a significant influence on the strip shape not just the strip thickness. Based on the slit beam and roll deformation theories, the roll force distribution was analysed considering the asymmetric stiffness of the OS and DS of rolling mill, and the work roll and backup roll deformation equations were deduced respectively, and the thickness distribution in lateral direction of the hot rolled strip at exit was discussed. Using the roll elastic deformation analysis software which was developed previously based on the influence coefficient method, the roll flattening distribution, roll pressure distribution and the rolling force distribution caused by the asymmetric stand stiffness were calculated and analysed, and the exit strip profile of the rolling mill was also presented. The relationship between the mill stiffness difference and the strip wedge shape or single wave was obtained. Effect of the upstream asymmetric mill on strip crown and flatness of the downstream stands was discussed.

Review on Cold Rolling Mill Roll Deformation

2017 ◽  
Vol 1 (1) ◽  
pp. 83-95
Author(s):  
Dr. Ravi Goyal ◽  
◽  
Anurag Joshi ◽  
Umesh Gurnani ◽  
◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Mill Roll ◽  
Cold Rolling Mill ◽  
Rolling Mill Roll ◽  
Roll Deformation

Multi-Objective Model and Heuristic Algorithm for Billet Stacking Problem in Steel Production

2014 ◽  
Vol 889-890 ◽  
pp. 606-611
Author(s):  
Can Tao Shi ◽  
Guang Jing Dong ◽  
Yi Wei Ma
Keyword(s):  
Heuristic Algorithm ◽  
Calculation Method ◽  
Rolling Mill ◽  
Clustering Algorithm ◽  
Programming Model ◽  
Steel Production ◽  
Multi Objective ◽  
Multi Objective Programming ◽  
Objective Model ◽  
Best Fit

Aiming at billet stacking problem of the rolling mill, a multi-objective programming model is established. Billets on the roller are batched by clustering algorithm and then assigned to the warehouse stack positions by improved Clustering-based Best Fit algorithm (CBF). The utilization of non-empty warehouse stack positions and shuffles are considered in the algorithm. Compared to existing artificial calculation method, the proposed algorithm can not only reduce the shuffles significantly, but also improve the space utilization of warehouse stacking positions.

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