Measurement of the Actual Contact Area of Details by the Power of a Reflected Light Beam Directed to a Contact Surface Covered with a Film

Arkadiy Titov,Alexander Sandulyak,Anna Sandulyak,Mikhail Baharev

doi:10.1051/itmconf/20182201014

Abstract

Measurement of the actual area of details contact is important for control of friction and wear of such details. For this purpose, in particular, on a surface of one of details of couple covered with the thinnest layer of lubricant the thin film of coal is putted. On the raised dust surface impose the second detail of couple and squeeze them the application of normal loading. Light spots of contact are measured by planimetry. Instead of direct (labor-consuming) measurement of a large number of the areas of spots of contacts it is expedient to use integrated determination of the actual area of details – on the power of the beam of light reflected from ledges of a contact surface. The optical scheme of the device is developed, the efficiency of which for implementation is shown. Measurement of the actual area of details contact is important for control of friction and wear of such details. For this purpose, in particular, on a surface of one of details of couple covered with the thinnest layer of lubricant the thin film of coal is putted. On the raised dust surface impose the second detail of couple and squeeze them the application of normal loading. Light spots of contact are measured by planimetry. Instead of direct (labor-consuming) measurement of a large number of the areas of spots of contacts it is expedient to use integrated determination of the actual area of details – on the power of the beam of light reflected from ledges of a contact surface. The optical scheme of the device is developed, the efficiency of which for implementation is shown.

Highlights

At present, measuring the actual contact area of details are a very urgent task, since it largely determines the friction and wear of the details
The simplest and most convenient one should recognize adhesion, which is that a thin film of coal is deposited on the surface of one of the piece of a pair coated with a thin layer of lubricant, a second piece
We proposed an integral method for determining the actual contact area of details by the power of the light beam reflected from the projections of the contact area [3]

Summary

Introduction

At present, measuring the actual contact area of details are a very urgent task, since it largely determines the friction and wear of the details. The following methods for measuring the actual area of contact of surfaces are known: electrical; geometric; adhesive; optic; physicochemical [1]. The disadvantage of the method is low productivity, since it is necessary to measure a large number of areas of contact spots. To eliminate this shortcoming, we proposed an integral method for determining the actual contact area of details by the power of the light beam reflected from the projections of the contact area [3]

Calculations

Conclusions