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Ultra precision machining (UPM) is extensively used to fabricate high accuracy products. However, the problematic material swelling/recovery effect due to elastic recovery of materials in UPM remains unresolved. It causes ragged surface and extra engineering tolerance which are unadoptable in extremely precise components. In particular to high elastic recovery rate with low thermal conductivity materials like titanium alloys, swelling effect intensifies during machining. In this study, magnetic field was superimposed on titanium alloys during single point diamond cutting which aimed to minimize the material swelling effect on the machined surface using magnetic field influence. In the experiment, titanium alloys were located at the center of two permeant magnets with strength 0.02T and undergone diamond groove cutting. The experimental results showed the material swelling/recovery on the machined surface was significantly reduced in a presence of magnetic field in comparison to that of diamond cutting without magnetic assistance; the accuracy of depth of cut, width and radius of cutting groove in a magnetic field reached satisfactorily over 98 percent. The proposed machining technology solves the problem of material swelling/spingback of low thermal conductivity materials by a cost-efficient way which is needless of complicated equipment. Keywords: magnetic field; diamond cutting; titanium alloys; material recovery; material swelling *Source Manuscript Click here to view linked References Ultra precision machining (UPM) is extensively used to fabricate high accuracy products. However, the problematic material swelling/recovery effect due to the elastic recovery of materials in UPM remains unresolved. It causes a ragged surface and extra engineering tolerances which are unadoptable in extremely precise components. In particular to high elastic recovery rate with low thermal conductivity materials like titanium alloys, the swelling effect is intensified during machining processes. In this study, a magnetic field was superimposed on titanium alloys during the single point diamond cutting which aimed to minimize the material swelling effect on the machined surface using the magnetic field influence.In the experiments, titanium alloys were located at the center of two permanent magnets with intensity 0.02T and undergone a diamond groove cutting. The experimental results showed the material swelling/recovery on the machined surface was significantly reduced in presence of magnetic field in comparison to that of diamond cutting without a magnetic assistance; the accuracy of depth of cut, width and radius of cutting groove in a magnetic field reached satisfactorily over 98 percent. The proposed machining technology solves the problem of material swelling/spingback of low thermal conductivity materials by a cost-efficient way which is needless of complicated equipment.

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Ultra-precision manufacturing (UPM) is a promising manufacturing technology for fabricating micro-components and its production volume raises in the coming future due to a significant increase in the production volume for highly technological products nowadays. Therefore, UPM industries are accountable for executing sustainability practices to minimize negative environmental impacts from their manufacturing activities. However, sustainable UPM is difficult to execute practically up to now due to different aspects such as technology and knowledge gap. With a high speed of technology advancement nowadays, UPM industries enable to leverage this technological chance and employ the Internet of Things (IoT) technique to move UPM toward sustainability. Therefore, in this article, the current status and future perspective of sustainable UPM, the major research and technological gap between UPM and sustainability development, specific technical challenges for integrated IoT to UPM for sustainability goal are discussed and revealed to promote sustainable UPM. And consequently, a preliminary framework of IoT based UPM system with particular suggestions was firstly presented for facilitating sustainable UPM and acts as the reference to related industries and academia for further developing this novel technique in the future.

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