an experimental study on film thickness in a rolling

Analysis of Lubrication in Cold Rolling Geometric Model Figure 1 represents cold rolling of strips with hydrodynamic lubrication Analysis of the cold rolling process As shown in Fig 1 there are three zones that represent the strip during rolling: Inlet zone In that zone the strip remains rigid and the lubricant film is rapidly pressurized from the ambient pressure to the pressure at Electrical capacitance has been applied in the past for measuring the lubricant film thickness in rolling element bearings The main difficulty arises from the fact that the measured capacitance is a combination of the capacitances of many rolling elements which come in contact with both the inner and outer rings Besides the capacitance of the Hertzian contact itself and the surrounding

A study of lubrication mechanism of oil‐in‐water (O/W

The aim is to understand the lubrication mechanism of these rolling oils and to correlate the laboratory findings with that of industrial rolling mills – The lubrication mechanism has been studied with the help of an ultra thin film interferometry EHD test rig an advanced experimental rolling mill and a

The film thickness-roughness ratio Λ has been used since the mid-1960s as a simplified criterion for the lubrication conditions in rolling bearings However due to an assumed Gaussian distribution of the roughness height amplitudes of the functional surfaces of rolling bearings and other unsubstant

2 1 Supporting System for the Hydrostatic Spindle Fig shows the hydrostatic spindle structure This spindle is used in vertical machining equipment whose operating speed is 800 rpm It is found in the study based on the dynamic and static characteristics of the hydrostatic spindle [29 D Chen J Fan and F Zhang Dynamic and static characteristics of a hydrostatic spindle for machine

2000-4-1Fig 2 shows film profiles across the stationary lubricated contact Two profiles are plotted one taken across the centre of the contact in the direction of rolling (y=0) the other halfway out towards the side of the contact radius a again along the direction of rolling (y=0 5a) (In practice full film thickness maps were produced over the contact but these are difficult to interpret

Experimental Study of Lubrication Film Formation in Multiple Contacts Device Under Starved Conditions Petr Svoboda rolling bearings cams and traction drives operate under starved lubrication conditions where the average lubricant film thickness is considerably less than under fully flooded conditions These parts must operate correctly

Effect of Lubricant Film Thickness on Bearing Life under

2005-9-6Rolling direction Fig 5 Example of dent-initiated flaking −Effect of Lubricant Film Thickness on Bearing Life under Contaminated Lubrication Part 1: Life Tests for Ball Bearings in Contaminated Oil− 20 Koyo Engineering Journal English Edition No 167E (2005) however assuming that failure occurred in one of the two bearings for both failure modes the life data were statistically

2015-6-29Experimental Techniques Used for Model Validation The validation of the model is conducted for three parameters: 1 Lubricant film thickness in the contact (to validate Eq 5) 2 Frictional torque 3 Seal temperature Film thickness measurements The measurement of an absolute value of film thickness in the sealing contact has al-ways been a

Experimental Study of Lubrication Film Formation in Multiple Contacts Device Under Starved Conditions Petr Svoboda rolling bearings cams and traction drives operate under starved lubrication conditions where the average lubricant film thickness is considerably less than under fully flooded conditions These parts must operate correctly

2020-8-14Elastohydrodynamic film thickness and temperature measurements in dynamically loaded concentrated contacts: eccentric cam - flat follower (H van Leeuwen et al ) XXI Machine Elements (3) - Rolling Bearings Study of lubricant film in rolling bearings: effects

2018-2-1figures These results represent the fluid film developed ball and disc in rolling contact Below the analytically predicted interference pattern (left) is very similar to the experimental interference pattern To the right the film thickness results are compared the experimental results are shown in blue and the analytical results are in green

2013-8-31OPTICAL INTERFEROMETRY STUDY OF FILM FORMATION IN LUBRICATION OF SLIDING AND/OR ROLLING CONTACT' by E O Stejskal and A Cameron film thickness and traction in point contacts Mr D Wymer film thickness in line contacts Mr G Paul refractive 5 2 3 Experimental Procedure 125 5 2 4 Analysis of the Photographs 126

Electrical capacitance has been applied in the past for measuring the lubricant film thickness in rolling element bearings The main difficulty arises from the fact that the measured capacitance is a combination of the capacitances of many rolling elements which come in contact with both the inner and outer rings Besides the capacitance of the Hertzian contact itself and the surrounding

Analysis of Lubrication in Cold Rolling Geometric Model Figure 1 represents cold rolling of strips with hydrodynamic lubrication Analysis of the cold rolling process As shown in Fig 1 there are three zones that represent the strip during rolling: Inlet zone In that zone the strip remains rigid and the lubricant film is rapidly pressurized from the ambient pressure to the pressure at

An Experimental Study on Film Thickness in a Rolling

An Experimental Study on Film Thickness in a Rolling Bearing for Fresh and Mechanically Aged Lubricating Greases Yuxin Zhoua Rob Bosmana and Piet M Lugta b aFaculty of Engineering Technology University of Twente Enschede The Netherlands bQIBR Research and Technology Development Nieuwegein The Netherlands

2018-9-17Resistive Lubricant film thickness (RFT)- It is a indicative lubricant film thickness formed between the heaviest loaded ball and race of the ball bearing METHODOLOGY For a ball bearing the Resistive lubricant film thickness (RFT) can be estimated by the formula given by Matharu et al [19-23] is expressed below (ℎ )𝑇= 1 2

This paper describes an experimental study of starvation and flow behavior in grease-lubricated elastohydrodynamic contact Rolling tests were conducted with four grease samples with different thickeners and base oils in a conventional ball-on-disk test rig The EHL central film thickness was determined with SLIM the Spacer Layer Imaging

Zhu Yongcheng Ren Hanwen (Wuhan Institute of Technology) A Study of the Power Loss at EHD Contact Area of Continuously Variable Transmission[J] 1993-01 2 WANG Xue-feng GUO Feng FU Zhong-xue YANG Pei-ran (School of Mechanical Engineering Qingdao Technological University Qingdao 266033 China) Experimental Study of an Abnormal EHL Film with Inlet-dimples [J] Tribology 2007-03

2018-5-17This work presents an experimental study of the grease film thickness inside an axially loaded rolling bearing The film thickness shows a dynamic behavior: a thick film after starting up followed by a rapid decreasing film thickness due to starvation and an increasing temperature

2018-5-6Figure 6 shows the effect of rolling speed on the average thickness of fabricated PC film The result suggests that increasing the rolling speed results in a small decrease in the average thickness of fabricated PC film It can be concluded that the rolling speed has little effect on the surface quality and thickness uniformity of the PC film

Zhu Yongcheng Ren Hanwen (Wuhan Institute of Technology) A Study of the Power Loss at EHD Contact Area of Continuously Variable Transmission[J] 1993-01 2 WANG Xue-feng GUO Feng FU Zhong-xue YANG Pei-ran (School of Mechanical Engineering Qingdao Technological University Qingdao 266033 China) Experimental Study of an Abnormal EHL Film with Inlet-dimples [J] Tribology 2007-03