Abstract
For some manufacturing processes, the heat transfer between the components, the tools and the environment has an effect on tool-life and the accuracy of the formed component. Consequently, the measurement of Thermal Contact Resistance (TCR) is of increasing interest to researchers and industrial engineers participating in the manufacture of high-precision components. A new transient method and measurement apparatus are used in which the measurements are conducted on specimens, which are retained under pressure. An apparent advantage of this method is the ability to estimate the TCR under specifically controlled conditions. The other advantage is that no prior information is needed on the variation of the TCR, since the solution automatically determines the functional form over the domain specified. Therefore, in this research, a new method of determining TCR has been successfully used to measure the dependence of TCR on the pressure and the specimen texture.
Highlights
The energy expended to plastically deform materials in manufacturing processes such as metalforming processes is converted almost entirely into heat
The mathematical formulation of this utilizing the ideas based on perturbation principles; problem is given in dimensionless form as: transform the inverse problem to solution of three
A new method of determining thermal contact resistance has been successfully used to estimate the dependence of thermal contact resistance on pressure and surface texture
Summary
The energy expended to plastically deform materials in manufacturing processes such as metalforming processes is converted almost entirely into heat This energy increases the temperature of the formed component and the tools while some of it is dissipated to the environment. The heat flow must pass through the macro-contact and micro-contacts to transfer from one surface to another. This phenomenon leads to a relatively high temperature drop across the interface. Analytical, experimental and numerical models have been developed to predict TCR since the 1930’s. These models are applicable only to the limiting cases and none of them covers the general nonconforming rough contact[1]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
