International Journal of Mechatronics and Manufacturing Systems
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International Journal of Mechatronics and Manufacturing Systems (3 papers in press)
Virtual Reality Training Platform for a Computer Numerically Controlled Grinding Machine Tool by Christian Hirt, Martina Spahni, Yves Kompis, Dominic Jetter, Andreas Kunz Abstract: In-depth training of machine tool (MT) operators is crucial to avoid machine damage due to faulty operation. However, machine-hours are costly and during the training, the MT is unavailable for regular production purposes. Here, virtual real-size models offer a solution by providing basic operation principles to future operators. In this context, it is yet unknown whether a virtual teaching enhanced by real walking is similar to a real teaching scenario regarding the learning efficiency and long-term memory retention. This paper describes a study comparing the learning efficiency of a virtual training session with traditional instructions on a real MT. The learning success of both training groups is objectively and subjectively assessed on a realMTa week later. In this assessment, the task completion time and the number of errors are recorded. We observed that the virtually taught group slightly outperformed trainees taught in reality regarding both objective measurements. Keywords: Virtual Reality Training; Digital Twin; Digital Manufacturing,
Micro-WEDM of Ni55.8Ti Shape Memory Superalloy: Experimental Investigation and Optimization by Hassan Ali M. Meshri, Samad Nadimi Bavil Oliaei, Mirsadegh Seyedzavvar, Sadik Engin K?l?ç Abstract: Nickel-titanium superalloy has gained significant acceptance for engineering applications as orthotropic implants, orthodontic devices, automatic actuators, etc. Considering the unique properties of these alloys, such as high hardness, toughness, strain hardening, and development of strain-induced martensite, micro-wire electro-discharge machining ( Keywords: Ni55.8Ti; µ-WEDM; MRR; kerf width; white layer; surface roughness.
Investigative Study of Cutting Parameters during Turning Hardened Steel with Carbide Inserts by Prashant Bagga, Mayurkumar Makhesana, Anand Patel, Arvind Sankhla Abstract: Traditionally, the turning of hardened steel is accomplished with cutting tools made of materials like ceramics, CBN, diamond, etc. Due to advances in the coating layer, machining hard steel with carbide inserts is gaining importance. One of the critical aspects of reducing the machining cost is tool life. By optimizing tool life, savings in the machining cost can be obtained. This paper proposes the method to increase the cutting tool's life by investigating the variables affecting it, i.e., cutting speed, feed, and depth of cut with the help of carbide inserts having multilayer coatings. Experiments to optimize flank wear, which is gradual wear and often correlated to tool life, were conducted using Response surface methodology. To determine the impact of these input variables on the amount of flank wear, Analysis of Variance (ANOVA) was applied to the results of the experiments. A quadratic model was proposed to forecast flank wear. Keywords: Flank wear; tool life; hardened steel; turning; coated carbide inserts.