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Mathew Flemmer

Doctor of Philosophy, (Engineering)
Study Completed: 2019
College of Sciences


Thesis Title
Plasma-arc Cutting control: Investigations into machine vision, modelling and cutting head kinematics

Read article at Massey Research Online: MRO icon

Plasma-arc cutting is a metal fabrication technology used in New Zealand and around the world. The process has complex interaction effects between various input parameters such as cutting speed, torch-height and plate-thickness. The magnitude of these effects and their impact on the end product requires a high degree of expertise from the operator. Mr Flemmer investigated automating the tuning of these process parameters in order to make the process more accessible, accurate and competitive with other fabrication processes. He developed a machine vision-based, feedback system to provide accurate and automated kerf-width measurement. By modelling the process, he developed a first-order analysis of the cutting mechanism. Finally, he derived a kinematic analysis of plasma-arc cutting heads. The results of his research have facilitated the development of a novel, control-method for plasma-arc cutting

Dr Liqiong Tang
Dr Subhas Mukhopadhyay