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STC G - 2015 Annual Report

The year 2015 was successful for the Scientific Technical Committee STC “G”. Fifty-nine people attended the STC G winter meeting in Paris in February, and forty-two people attended Part II of the STC G meeting held at the General Assembly in Cape Town in August. 

In the STC G winter meeting, Mr. Soo updated the progress of the 2015 keynote paper “Abrasive Machining of Advanced Aerospace Alloys and Composites,” and the contents were confirmed and approved. Mr. Brinksmeier updated the progress of the 2015 keynote (former Track 1) paper “Metalworking Fluids,” and the contents were also confirmed and approved. Mr. Hashimoto updated the progress of the 2016 keynote paper “Abrasive Fine-Finishing Technology,” and the contents were approved. Three topics for future STC G keynote papers were proposed, and all proposals were conditionally accepted. “Recent Developments in Grinding Machines” coordinated by Mr. Wegener was approved to be the 2017 keynote paper in collaboration with STC M. “Abrasive Machining of Non-Metallic Materials” by Mr. Shih and “Micro Abrasive Processes” by Mr. Aurich were approved to be the keynote papers of 2018 and 2019, respectively.
In the laboratory presentation session, an overview of the Laboratory for Advanced Processes and Sustainability (LAPRAS) at the University of Sao Paulo, Brazil, was presented. Six topics were presented in the technical contribution session. The topics included a robot-assisted vibration polishing process, grinding wheel dynamics in atherectomy, neural network models for predicting the effective cutting width of a single-point dresser, grinding of micro patterns on free-form surfaces, manufacturing of structured surfaces via grinding, and simulation of grind hardening processes.

The STC G contributions to Part I of the General Assembly in Cape Town
included two keynote papers entitled “Abrasive Machining of Advanced Aerospace Alloys and Composites,” given by Mr. Soo, and “Metalworking Fluids—Mechanisms and Performance,” given by Mr. Brinksmeier and Mr. Meyer, and twelve regular papers. The first keynote paper provided a comprehensive overview of the current state-of-the-art technology of grinding/abrasive machining of advanced aerospace alloys and composite materials with case studies in the aero-engine manufacturing sector. The second keynote (former Track 1) paper gave an extensive overview of complex working mechanisms of metalworking fluids and the effects of the metalworking fluid chemistry on its performance in manufacturing. Both keynote papers were well received. The regular papers presented covered a broad range of topics, including shape adaptive grinding, control of toolpath in polishing using 5-axis CNC machine, process monitoring and control of robot-assisted polishing, electroplated diamond tools with laser-generated positive clearance, modeling of a micro finishing process, micro grinding with ultra-small pencil tools, dry grinding of pre-cooled workpiece, demand-oriented fluid supply in grinding, hybrid abrasive tools, sub-micron-grade carbide grinding, modeling of vibratory finishing machines, and surface integrity of silicon wafers after high-speed diamond scratching.

Highlights of the STC G meeting in Part II
of the 65th General Assembly in Cape Town included seven technical contributions, two 2015 keynote papers, and five future keynote papers. The technical contribution topics included energy efficiency in grinding, thermomechanical load on material modification in grinding, texturing of forged engine crankshafts, double‐sided polishing of 450 mm diameter silicon wafers, vibrational finishing process, ultrasonic-assisted grinding, and plasma-treated industrial diamond abrasive. The success of the 2015 keynote papers, “Abrasive Machining of Advanced Aerospace Alloys and Composites” and “Metalworking Fluids—Mechanisms and Performance,” was acknowledged. Regarding the future keynote papers, the progress of the 2016 and 2017 keynote papers were presented, and the contents of both were approved. The concepts of the 2018 and 2019 keynote papers, refined according to the suggestions received in the winter meeting in February 2015, were presented, and both paper concepts were accepted. A topic for a future Cross-STC keynote paper, “Advanced Manufacturing for Enhancing the Performance and Functionality of Tooling for Metal Forming,” was proposed by Ms. Cao from STC F, and the support of STC G for the keynote paper was requested. The proposal was accepted, and the STC G support of the proposed keynote paper was approved. Mr. Aurich, Chairman of STC G, encouraged the audience to present contributions in the next winter meeting in Paris in February 2016. Any abrasive-related topics will be welcome.

Jan Aurich, Chairman, STC G, 7th of October 2015