We are rapidly moving into the new era of digitisation, an Massive Internet Things - towards Gigabit Society and 5G Technology. The implications truly far reaching. Rapid transformation through implementation INDUSTRY 4.0 is becoming visible in industries all over world. Disruption to more traditional industrial practices processes inevitable. High Performance Cutting no exception. Developments (IoT) opens up extremely powerful capabilities help us gain a significantly deeper understanding...

The piezoelectric flextensional actuator investigated in this paper comprises three pre-stressed piezoceramic lead zirconate titanate (PZT) stacks and an external, flexure-hinged, mechanical amplifier configuration. An electromechanical model is used to relate the electrical domains, comprising PZT flexure mechanism, with dynamic characteristics of latter represented by a multiple degree-of-freedom model. Maxwell resistive capacitive describe nonlinear relationship between charge voltage...

The production of silicon substrates for integrated circuits continues to set standards in levels precision form and finish tolerances required surface generation processes. Extreme are specified a range parameters such as total thickness variation, global local planarity, over substrate dimensions up 300mm diameter (current-generation wafer). These related the ‘design rule’ each microprocessor memory unit. economic technological environment an industry that demands is reviewed. general...

Polycrystalline cubic boron nitride (PCBN) cutting tools have enabled large-scale industrial hard machining owing to their high hot hardness and wear resistance. Experience clearly shows that tool requirements vary depending on the presence severity of interrupts in workpiece. The interrelationships between workpiece interruption parameters performance are assessed using a programme continuous, semi-interrupted, interrupted tests. A hypothesis for observed variations behaviour different PCBN...

An ageing population, increased physical activity and obesity are identified as lifestyle changes that contributing to the ongoing growth in use of in-vivo prosthetics for total hip knee arthroplasty. Cobalt–chromium–molybdenum (Co-Cr-Mo) alloys, due their mechanical properties excellent biocompatibility, qualify a class materials meet stringent functional requirements these devices. To cost effectively assure required dimensional geometric tolerances, manufacturers rely on high-precision...

In the domain of CNC (Computer Numerical Control) machining, both positional and contouring accuracy are extreme importance. Moreover, need for higher precision more complex freeform surfaces has reduced component geometric tolerances increased demand process capabilities. 5-axis machine tools (or machining if you prefer) have enabled realization these availing full tool posture control, while also reducing set-up production time. However, identification quantification associated errors is a...

In the semiconductor industry, chemical mechanical polishing (CMP) is utilized to planarize surface of silicon wafers following lithography and deposition steps, preparing for subsequent layers interconnects. Stringent local global planarity tolerances are imposed by feature size decreases wafer increases dictated Moore’s law. The introduction fragile, porous, oxide materials their low dielectric constant also fragility being processed. An issue that has received significant attention in...

We present a novel approach to estimating the effect of control parameters on tool wear rates and related changes in three force components turning medical grade Co-Cr-Mo (ASTM F75) alloy. is known be difficult cut material which, due combination mechanical physical properties, used for critical structural implantable prosthetics. run designed experiment which enables us estimate from feed rate cutting speed, constrain them using Bayesian hierarchical Gaussian Process model prediction...