The key to successful manufacturing of complicated geometry in numerically controlled machines lies in the control and quality of operations planning. Process planning, as it is considered plays an important role in the innovation process. It is the interface between product development and manufacturing system development. Hence, in this paper, process planning is considered to be an active part in the concurrent development of products and their manufacturing systems, not only as an activity where manufacturing resources are selected. The authors focus on the use of the new standard; ISO 14649, to address the process planning and machining of turn/mill discrete components. This paper identifies a view of how ISO 14649 can be used to combine turning and milling operations to achieve the complete machining of rotational asymmetric components at a single turning centre. The use of the individual parts of the evolving standard ISO 14649, namely Parts 10, 11, 12, 111 and 121 has been investigated to provide the means to represent STEP-compliant turn/mill component programs.

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