A procedure for planning acyclic setups on the basis of simultaneous sequencing of setups and features

Setup planning is an important function in CAPP systems for determining the setups, sequencing these setups and their constituent machining features, and planning the jig or fixture required for each setup. The remedial or preventive measures required to resolve the problem of cycles commonly arisen between the setups are considered as a major challenge in setup planning procedures. In the present study, a permutation-based approach is introduced to setup planning which, in addition to its flexibility and ease of use, precludes the cycles. For this purpose, new rules have had to be introduced for the geometrical machining rules and an algorithm for automated application of these rules. The proposed procedure for the setup planning and application of the machining rules have been developed in Python OCC and verified by a detailed example.

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