Closure to “Discussion of ‘A Hydrodynamic Lubrication Theory for Strip Rolling Including Thermal Effects’” (1975, ASME J. Lubr. Technol., 97, pp. 12–13)

1975 ◽  
Vol 97 (1) ◽  
pp. 13-13
Author(s):  
T. A. Dow ◽  
J. W. Kannel ◽  
S. S. Bupara
Keyword(s):  
Thermal Effects ◽  
Hydrodynamic Lubrication ◽  
Lubrication Theory ◽  
Strip Rolling ◽  
Hydrodynamic Lubrication Theory

A Thermal Hydrodynamic Lubrication Theory for Hydrostatic Extrusion of Low Strength Materials

1976 ◽  
Vol 98 (2) ◽  
pp. 335-342 ◽  
Author(s):  
R. W. Snidle ◽  
B. Parsons ◽  
D. Dowson
Keyword(s):  
Plastic Deformation ◽  
Theoretical Analysis ◽  
Thermal Effects ◽  
Hydrodynamic Lubrication ◽  
Extrusion Process ◽  
Lubrication Theory ◽  
Lubricant Film ◽  
Hydrostatic Extrusion ◽  
Solid Friction ◽  
Hydrodynamic Lubrication Theory

The paper presents a theoretical analysis of hydrodynamic lubrication in the hydrostatic extrusion process which includes a consideration of thermal effects in the lubricant film arising from the work of plastic deformation. A Newtonian lubricant with an exponential pressure-temperature-viscosity relationship has been assumed and allowance has been made for the effects of redundant deformation of the worked material. The results of the theory are compared with those from previous isothermal and solid friction theories.

A Hydrodynamic Lubrication Theory for Strip Rolling Including Thermal Effects

1975 ◽  
Vol 97 (1) ◽  
pp. 4-12 ◽  
Author(s):  
T. A. Dow ◽  
J. W. Kannel ◽  
S. S. Bupara
Keyword(s):  
Thermal Effects ◽  
Hydrodynamic Lubrication ◽  
Fluid Pressure ◽  
Pressure Effects ◽  
Work Zone ◽  
Experimental Comparison ◽  
Pressure Measurements ◽  
Roll Surface ◽  
Strip Rolling ◽  
Hydrodynamic Lubrication Theory

A model of hydrodynamically lubricated cold rolling including thermal and pressure effects on the lubricant is developed in this paper. The hydrodynamic film thickness is calculated as well as the work zone pressure and shear stress distribution for several conditions assuming that the lubricant behaves as a Newtonian fluid. Pressure measurements made with vapor-deposited thin-film transducers on the roll surface are used for experimental comparison.

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