Fused Deposition Modelling (FDM), a renowned Rapid Prototyping (RP) process, has been successfully implemented in several industries to fabricate concept models and prototypes for rapid manufacturing. This study furnishes terse notes about the material damping properties of FDM made ULTEM samples considering the effect of FDM process parameters. Dynamic Mechanical Analysis (DMA) is carried out using DMA 2980 equipment to study the dynamic response of the FDM material subjected to single cantilever loading under periodic stress. Three FDM process parameters namely Build Style, Raster Width and Raster Angle were contemplated. ULTEM parts are fabricated using solid normal build style and three values each of raster width and raster angle. DMA is performed with temperature sweep at three different fixed frequencies of 1, 50 and 100 Hz. Results were obtained for dynamic properties such as Maximum Storage Modulus, Maximum Loss Modulus, Maximum Tan Delta and Maximum Complex Viscosity. The present work discusses the effect of increasing the frequencies and temperature on FDM made ULTEM samples using different FDM process parameters.
The material handling is the art of moving, orienting, packing and storing the part. Industrial feeders are used to facilitate the operations by feeding the parts in a specific quantity and at a perfect orientation. It is a tedious task to obtain a particular part orientation, at the assembly station, in a short lead time. To overcome this problem, part feeders are used to segregate and orient parts prior to packing. The natural resting orientation of the part is the orientation in which the part rests on a horizontal hard surface, when dropped from a height. The most probable natural resting orientation of the part has to be identified which helps in the effective design of feeder and orienting devices. In this paper, an attempt was made to study the effect of initial orientation from different heights on natural resting orientation. Drop test was conducted at different heights with each initial orientation. The favorable orientation of the part (or) the most probable natural resting orientation is identified using drop test. In this work, most probable natural resting orientation of a typical asymmetric component, brake pad, is identified.
In the modern industrial world, speed, agility, accuracy and less time are the key factors to attain a position in the market. Various forms of the products manufactured which could either be symmetric or asymmetric. The stacking of the asymmetric parts are either done manually which is a time-consuming job or by installing robots which are costly. To overcome this problem, part feeders are introduced to stack the parts in a specific orientation. In the automotive industry the brake pads are the components manufactured in a large scale. The manufacture of components and stacking them is an intensive task which necessitates agile manufacturing. So a linear part feeding system is designed along with the trap and conveyor system to reorient the asymmetric part to its most favorable orientation for stacking. The major problem arrives in part feeding system is to send parts one by one to trap. The main objective of this work is to design and develop the singularizing unit for sending the parts one by one. The system is designed to separate the brake pads from clusters and singularize them. The singularizing unit is designed by using Markov model and the unit is fabricated. Experiments were conducted for selecting the suitable parameters by making the unit at various levels of inclinations by using base plates of various thicknesses. The parameters which are concentrated while orienting the parts are frequency of vibration, time to travel the part on the singularizing unit and acceleration of the part for effective part motion in a singularizing unit.
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