Microremoval modeling of surface roughness in barrel finishing

Abstract

This paper presents a model to describe the evolution of the roughness profile machined by barrel finishing (BF) operation. It is based on the measure of the material removal (MR) and on the assumptions that no plastic deformation and cutting of peak take place. In order to obtain these information, a morphological procedure has been developed based on the finding of a representative peak of the profile. By this way, it is possible to overcome the common problem of repositioning the instrument on a specific point of the surface, especially if an action takes place. The measurements taken on specimens machined in different conditions satisfied the assumptions and confirmed the capability of the model to predict roughness attainable. An interesting result has been the constant MR per working time. The analysis has been carried out by means of statistical approach demonstrating the reliability of the model. This permits to obtain a desired level of surface roughness just stopping the operation at a specific working time. Especially for BF, it is very useful considering that the inspection in-process is not possible. © Springer-Verlag London 2013

Enhancing dimensional accuracy of FDM based biomedical implant replicas by statistically controlled vapor smoothing process

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“…Generally, post processing with material removal method is adopted (mechanical and vibratory finishing) which yielded good results, but resulted in poor dimensional accuracy, edge cutting and rounding at higher machining durations [2,9]. Moreover, material removal is not uniform when intricate and complex designs are finished which induces dimensional variability.…”

Mathematical modelling of surface roughness for vapour processing of ABS parts fabricated with fused deposition modelling

“…Fused deposition modelling (FDM) has emerged as a highly competitive digital manufacturing technique which has bridged the gaps between conceptualization and realization of products [1]. The intricate shapes can be produced within few hours with minimum utilization of conventional manufacturing resources like jigs, fixtures and part specific tooling.…”

“…The mass finishing process has been adopted in which ABS parts produced by FDM are machined in rotating barrel [1] where material removal takes place in firm of chips as a function of working time. The mathematical model has been presented to attain desired surface roughness based machining time, initial surface roughness, layer, thickness and orientation angle.…”