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Jurandir Primo, PE
The non-conventional machining process (or non-traditional machining process) is a special type of process in which there is no direct contact between the tool and the workpiece. The non-conventional machining methods allow the machining of complex shapes, not at least because of the use of advanced CNC-technology. Evidence is given of the growing economic importance and the enlarged scope of applications covered by non-conventional manufacturing methods.
Machining is a part of the manufacture of many metal products, but it can also be used on materials such as wood, plastic, ceramic, and composites. Since the advent of new technologies such as, CNC center machines, electrical discharge machining, electrochemical machining, electron beam machining, photochemical machining, ultrasonic machining and so on, the so-called non-conventional machining methods can no longer be called “non-traditional”, since they found a wide range of applications.
The modern machining nowadays is carried out by Computer Numerical Control (CNC), in which computers are used to control the movement and operation of the cutting machines; however, these thermal, electro-physical and electro-chemical material removal methods, always compete with the more traditional machining techniques.
According to history, the non-conventional machining processes were initiated as early as in nineteen- twenties. The initiation was first made by Gussev towards the end of 1920, in USSR. He suggested a method of machining by combination of a chemical and mechanical means. His work is the basis for all electrochemical processes known today.
The basis of Laser Beam Machining was developed by the Russian scientists Basov, Prokhorov and Fabrikanth in 1950. Other unconventional machine tools, as the Electro Chemical Grinding was also developed in the same year. Many of these new techniques of machining have been developed in last few decades to meet the challenges forwarded by rapid development of hard to machine and high strength temperature resistant alloys.
This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.
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