The book proposes a new approach to the design of technological processes for machining of machine parts, laid down in the basis of the creation of computer aided design system (CAD) of technological processes. The basic provisions of the construction of technological processes of machining parts, formalized description of private design technological problems, the principles of designing CAD production preparation and methods of performing design work by software tools of the system are set out. The developed methods of designing technological processes and their software implementation allow to significantly increase the efficiency of works in technological preparation of production. The book will be useful to technologists of machine-building enterprises, developers of automated systems of technological design, students and teachers of technical universities.pThe book proposes a new approach to the design of technological processes for machining of machine parts, laid down in the basis of the creation of computer aided design system (CAD) of technological processes. The basic provisions of the construction of technological processes of machining parts, formalized description of private design technological problems, the principles of designing CAD production preparation and methods of performing design work by software tools of the system are set out. The developed methods of designing technological processes and their software implementation allow to significantly increase the efficiency of works in technological preparation of production. The book will be useful to technologists of machine-building enterprises, developers of automated systems of technological design, students and teachers of technical universities./p