Results 181 to 190 of about 270,247 (224)

Comparison of rolling and sliding groove formation

Materials Science and Engineering: A, 1989
Abstract The relationship between rolling and sliding loaded contact between surfaces is important in many materials problems. In this study, comparisons have been made of the forces required to produce grooves of the same geometry and size in metal surfaces, by rolling and by sliding a doublecone disc indenter of a much harder material.
Zhang Guowei, Victor R. Howes, Mary A. Ryan   +2 more
openaire   +1 more source

The Mechanics of Longitudinal Rolling of Tube through Grooved Rolls

1980
Earlier theoretical analyses of longitudinal tube rolling have been based on equilibrium methods but such analyses have not yielded relationships which correlated satisfactorily with experimental results. Consequently a new approach, incorporating strain energy, the constant shear stress principle for friction, and the apparent strain concept, has been
A. S. Haleem, I. M. Cole, D. H. Sansome
openaire   +1 more source

Effect of Rolling Ratio on Groove-Section Profile Ring Rolling

Journal of Mechanical Science and Technology, 2010
Ring rolling is an advanced plastic forming technique which is used to manufacture precise seamless rings. Rolling ratio is regarded as a decisive parameter for the ring rolling process because it decides the blank dimension, reflects the ring deformation degree and influences the forming results. However, its importance for the ring rolling process is
Dong-Sheng Qian
exaly   +2 more sources

An Investigation of the Rolling of Cylindrical Tube by Grooved Roll

1969
The objective of this work has been the investigation of the processes in which tubes are rolled in the longitudinal mode through two driven, grooved rolls. These processes may be categorised as follows:- (i) Sinking, which is the simplest procedure, and in which the tube is passed through the rolls unconstrained and without internal support.
openaire   +1 more source

Evaluation of Modular Roll-Setup to Roll Grooves into Steel Sheets

Applied Mechanics and Materials, 2015
Hybrid structures made of aluminium and steel are used in an increasing amount to produce lightweight optimised parts, e.g. for the automotive industry. One option to produce these optimised components is a combination of a steel sheet with a reinforcing aluminium rib structure by high pressure die casting.
Stefan Senge, Gerhard Hirt
openaire   +1 more source

Experimental determination of the rolling force on the rolls with grooves

2005
The paper deals with experimental determination of the rolling force on the rolls with grooves.
Lukša, Francisko, Domazet, Željko
openaire   +2 more sources

A study of roll gap adjustment due to roll wear in groove rolling: Experiment and modelling

Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2008
In the tandem groove rolling process, when a certain amount of wear on the work roll exists and the roll speed is not changed, the roll gap, i.e. the section height, should be adjusted to keep a mass balance between stands, i.e. multiply the exit cross-sectional area by the roll speed between stands.
S M Byon, Y Lee
openaire   +1 more source

A study of helical-groove rolling in China

Journal of Materials Processing Technology, 1990
Abstract This paper deals with the history and development of helical-groove rolling in China. The achievements in the establishing of the design parameters of the main tools and of the technical parameters for the rolling of helical grooves in China are introduced also.
openaire   +1 more source

Stress intensity factors for cracks in grooved rolls used for hot-rolling

Theoretical and Applied Fracture Mechanics, 1991
Abstract A procedure is described for the calculation of stress intensity factors for surface cracks in a section roll. Results are given in terms of the load acting on the roll and the average pressure acting on the roll/workpiece interface. It is noted that the load acting on the roll can be determined for individual cases by experimentally ...
Y.C. Lam, J.R. Griffiths, R.I. Fraser
openaire   +1 more source

Sphere rolling down a grooved track

American Journal of Physics, 1985
The motion of a uniform sphere rolling without slipping down a grooved track is discussed in detail. Using elementary mechanics, a formula is derived for the final speed as a function of groove width, sphere radius, and track height. The physical mechanism causing this functional dependence is explained. It is shown that a minimum coefficient of static
openaire   +1 more source