Special Topics Related to Finishing Methods

In most finishing processes, thermomechanical interactions occur between the processing tool (cutting tool, grinding wheel, polishing pad, electron beam, etc.) and the work material in the presence of machine tool and operational factors.

Most of these interactions and their results are addressed in the articles mentioned above. However, a few topics common for all finishing methods deserve special attention.

"Thermal Aspects of Finishing Methods." Thermal interactions are one of the key types of microscopic interactions in all finishing methods. They are maximized in some applications and minimized in others. These interactions are strongly dependent on the process selected and the four input elements (machine tool, process tool, operational factors, and work material). General consideration of thermal interactions and their control is critical for any successful use of finishing methods.

"Selection, Application, and Disposal of Finishing Fluids." All finishing methods are carried out in the presence of an environment. Air or ambient conditions may be most common in dry finishing methods. All finishing methods that are carried out "wet" involve the use of a fluid whose function may be intrinsic to the process interactions, such as cooling effects and lubricating effects, or extrinsic, such as removal of the swarf and the thermal stability of the system. Environmental elements such as dielectric fluid play a critical role in electrical discharge machining. Whatever the role of the fluid used in the finishing methods, increasing attention will be paid to their use, maintenance, and proper disposal, and all these aspects of the fluids require special consideration.

"Influence of Work Material Properties on Finishing Methods." The microstructure, properties, and performance requirements of the work drive the selection of suitable finishing methods. Conversely, finishing methods influence the microstructure, properties, and performance of the surfaces generated on work materials. The final article in this Section describes these relationships and presents some guidelines relative to advanced materials.

Finishing Methods Using Defined Cutting Edges

V.C. Venkatesh and S. Enomoto, Gintic Institute of Manufacturing Technology, Nanyang Technological University, Singapore

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