Research Towards High Speed Freeforming

Additive manufacturing (AM) methods are currently utilised for the manufacture of prototypes and low volume, high cost parts. This is because in most cases the high material costs and low volumetric deposition rates of AM parts result in higher per part cost than traditional manufacturing methods. This paper brings together recent research aimed at improving the economics of AM, in particular Extrusion Freeforming (EF). A new class of machine is described called High Speed Additive Manufacturing (HSAM) in which software, hardware and materials advances are aggregated. HSAM could be cost competitive with injection moulding for medium sized medium quantity parts. A general outline for a HSAM machine and supply chain is provided along with future required research

Automated software for streamlining optimisation of resource planning for an additive manufacturing system

Abstract. The use of additive manufacturing (AM) systems in scale production has rapidly increased in recent years. The growing tendency to adopt AM technologies into established manufacturing systems has led to research that considers the optimisation of both process and resource planning. In order to maximise the outputs of such a production process, planning must be conducted rigorously. This paper proposes an automated software tool, called EasyPlan, which streamlines the optimisation of resource planning. The algorithm is developed using LabVIEW and is demonstrated for an AM component from the medical industry. For the evaluation process, parameters such as stock levels, delivery terms and technical charts of the products are provided. A user friendly interface is developed, making EasyPlan versatile to all types of environments

Automated software for streamlining optimisation of resource planning for an additive manufacturing system

Abstract. The use of additive manufacturing (AM) systems in scale production has rapidly increased in recent years. The growing tendency to adopt AM technologies into established manufacturing systems has led to research that considers the optimisation of both process and resource planning. In order to maximise the outputs of such a production process, planning must be conducted rigorously. This paper proposes an automated software tool, called EasyPlan, which streamlines the optimisation of resource planning. The algorithm is developed using LabVIEW and is demonstrated for an AM component from the medical industry. For the evaluation process, parameters such as stock levels, delivery terms and technical charts of the products are provided. A user friendly interface is developed, making EasyPlan versatile to all types of environments

Multivariable Regression Analysis for Optimised Mass Calculation of MEX 3D Printed Parts

Since its introduction in the early 1990s Material Extrusion (MEX) has become the most popular additive manufacturing technology for a variety of applications. One of the reasons of its popularity amongst users is the affordability of the equipment, materials and the open source software. Given the large variety of combinations optimisation of MEX process parameters can be quite elaborate. The paper provides a method for optimisation of mass calculation using multivariable regression analysis. Layer thickness, printing temperature and printing speed were considered the independent variables for a two level factorial experimental program. DOE was used to plan 12 sets of programs, out of which four were found to have significant models. The four models were validated through measured and calculated responses

Minunatele întâmplări ale lui Niţă Zdrenghea la Bucureşti, în America şi aiurea

Minunatele întâmplări ale lui Niţă Zdrenghea la Bucureşti, în America şi aiurea / de Alex. Lupea-Melin. - Sibiiu : Editura "Asociaţiunii", 1927. - 74 p. ; 17 cm. - (Biblioteca poporală a "Asociaţiunii" ; Nr. 149 ). - Cuprinde: Lupta cu taurii la Bucureşti ; Niţă Zdrenghea în America ; Bucur din Merghindeal ; Nana Paraschie ; Când am jucat teatr

Din răsboi : versuri și cântece

Blaj : Tipografia Seminarului teologic greco-catolic, 191

Geometry Optimisation of Tools used in Milling of Spherical Surfaces

In this paper, the authors show an original methodology for optimisation of tool geometry used in the milling of spherical surfaces. This methodology is based on thorough theoretical research, which highlights the kinematic characteristics of spherical surface generation by milling. These characteristics lead to the conclusion that the constructive angles of tools used in spherical surface milling must have the same values on both cutting edges. In this paper, a practical design methodology of these tools is also presented, both for exterior spherical milling, and for interior spherical milling

Sămânţa viitorului : îndemnuri pentru părinţi

Blaj : Tipografia Seminarului Teologic Greco-Catolic, 1918. - 60 p. ; 8