Investigation into Layered Manufacturing Technologies for Industrial Applications
Additive processes, which generate parts in a layered way, have more than 20 years of history can be defined as layered manufacturing. Layered manufacturing is gaining ground for rapid prototypes (RP), rapid tools (RT) and rapid manufacturing (RM) for production of functional parts. The paper describes which mechanism of layered manufacturing and definition and classification of rapid prototypes can be applied to complex geometries for long-term consistency. The paper demonstrates the application examples of layered manufacturing fulfilling the required physical, mechanical and geometrical properties. The most notable advantage is the integration of production planning and testing within the product development period.
3D Printing for Computer Graphics Industry
Rapid prototyping is a relativity new technology and is based on layered manufacturing which has similarities to the method an ordinary desktop paper printer works. This research is to obtain a better understanding on how to use computer graphics software, in this particular case Autodesk Maya, to create a model. The goal is to understand how to create a suitable mesh of a 3D model for use with a 3D printer and produce a printed model that is equivalent to the CAD software 3D model. This specific topic has not been scientifically documented which has resulted in an actual 3D model.
Simulation of thermal stresses due to grinding
Abstract An efficient finite element procedure has been developed to calculate the temperatures and stresses arising due to a moving source of heat. The procedure is applied to calculate the thermal stresses produced in hardened steels during grinding. The thermal load during grinding is modeled as a uniformly or triangularly distributed, 2D heat source moving across the surface of a half-space, which is insulated or subjected to convective cooling. The grinding of elastic and elastic–plastic workpiece materials has been simulated. The calculated transient stresses and temperatures in an elastic solid are found to be in good agreement with prior analytical and numerical results. In an elastic–plastic workpiece material, for which no analytical solution is available for the residual stress distributions, the finite element calculations show that the near surface residual stress is predominantly tensile and that the magnitude of this stress increases with increasing heat flux values. Based on an analysis of the effects of workpiece velocity, heat flux magnitude and convective cooling, on the residual stress distributions in an elastic–plastic solid, it is seen that the calculated thermal stress distributions are consistent with experimentally measured residual stresses on ground surfaces. Furthermore, the results explain often cited observations pertaining to thermally induced grinding stresses in metals.