Mehran Ektesabi
Swinburne University of Technology, Australia
Title: LSSA-CNC- Challenges in Large Scale Subtractive-Additive CNC Machine
Biography
Biography: Mehran Ektesabi
Abstract
Nowadays, the Large Scale Subtractive-Additive CNC Machines are used in rapid prototyping of superior parts for
very sensitive systems used in aerospace and maritime technology. In this paper, design of a production platform of
a Subtractive-Additive Machine is considered. Th e unit has workspace 2.5×6.5×0.5 meter with two heads that operate
simultaneously. Each of the two processing heads will have 5 DOFs. While one is used for subtractive processing the other
one does the additive processing and both work simultaneously capable of handling the products up to 500 Kg in weight. Th e
Subtractive-Additive machine uses laser deposition welding with powder nozzle where the specimen thickness depends on
size of powder, laser and nozzle geometry. In this study, many of the challenges of large scale systems, such as; large working
area with escalated problems in design and operation, large weight handling of specimen, simultaneous operation of two
heads/multi-heads, which may aff ect the response time and complication of production, eff ects on the precision of movement
by using elevated magnetic bearing system, eff ects on the precision of the size on the end product, complexity of movement
strategy, mutual eff ects of the two heads as integrated, vibration (mechanical as well as electrical EMI) as well as thermal eff ect
and heat treatment during manufacturing has been considered and solutions to overcome such problems are suggested