A new high strain rate forming process for titanium alloys is presented and named High Pressure Pneumatic Forming (HPPF), which might be applicable to form certain tubular components with irregular cross sections with high efficiency, both with respect to energy cost and time consumption. HPPF experiments were performed on Ti-3Al-2.5V titanium alloy tubes using a square cross-sectional die with...

We investigate relations between spatial properties of the free energy and the radius of Gaussian curvature of the underlying curved lattice geometries. For this purpose we derive recurrence relations for the analysis of the free energy normalized per lattice site of various multistate spin models in the thermal equilibrium on distinct non-Euclidean surface lattices of the infinite sizes. Where...

The manufacturing of the non-circular pipes made by reshaping process is becoming more and more important because of their utilizations as in different industries. In this work, a reshaping process is presented with cold rolling of a circular thick tube into a square cross section between four flat rolls in different passes. The influence of the amount of roll gap reduction in each pass on the ...

Abstract The research used shafts made of X5CrNi18-10 (AISI 304L) stainless steel, which is used, among others in the shipbuilding industry. turning process was carried out on CU500MRD universal lathe with use cutting inserts a corner radius 0.2; 0.4 and 0.8 mm. measurement forces during machining recorded using Kistler dynamometer. Surface roughness measurements were Waveline W20 profilometer....

We present a corner-detection algorithm based on a model for end-stopping cells in the visual cortex. Shortcomings of this model are overcome by a combination over several scales. The notion of an end-stopped cell and the resulting corner detector is generalized to color channels in a biologically plausible way. The resulting corner detection method yields good results in the presence of high f...

Over the past 25 years, interest in thermoplastic composites aircraft has steadily increased. Combining winding and laser-assisted tape placement is a promising method to manufacture structures using in-situ consolidation, as shown recently by manufacturing variable stiffness, unitized, integrated-stiffener wingbox at University of Limerick. The corner regions are critical point structure requi...

Single-point diamond turning (SPDT) assisted with slow tool servo (STS) is the most commonly utilized technique in fabrication of optical modules. However, path significantly affects quality machined surface. In order to realize determined machining accuracy effectively, a generation (TPG) method based on active control (MAAC) presented. The relationship between and error studied. Corner radius...

In this study, the modelling of arithmetical mean roughness after turning C45 steel was performed. Four parameters cutting tool geometry were varied, i.e.: corner radius r, approach angle κ, rake γ and inclination λ. After turning, Ra measured. The obtained values ranged from 0.13 μm to 4.39 μm. results experiments showed that surface improves with increasing radius, angle, decreasing angle. Ba...