The additive manufacturing (AM) technologies bring in a number of benefits over traditional subtractive manufacturing technologies. However as-built surface finish of AM produced components is often not satisfactory and usually needs further post-process. Surface roughness is vitally important to the product’s functional performance. However, the measurement and characterization of the complex ...

In this paper we present an investigation into visually perceived surface roughness. First we present psychophysical evidence that suggests that there is a simple relationship between perceived roughness and two well known surface parameters: fractal dimension and rms roughness. And that neither are good estimators, on there own, of perceived roughness. Second we present a measurement model for...

Surface replication has been widely used in aerospace, automotive and other industries as a non-destructive method for examination and assessment of either surfaces difficult to be accessed by measurement tools or parts difficult to be dismantled for measurement. The fidelity and accuracy of the replication is one of the major concerns in actual applications. This paper presents a comprehensive...

Recent advances in manufacturing technology and industrial automation require efficient and quality oriented machining practices. Performance, cost effectiveness and reliability of the work piece depends on the quality of surface roughness and can be measured with contact (conventional) and non contact (advanced) methods. Various measurement techniques starting from stylus to machine vision are...

Deliberate modification of bottom roughness, including smoothing to eliminate centimetre scale natural roughness and raking to induce quasiperiodic roughness, was investigated using diver observations, quantification of bottom roughness from stereo photography, and measurement of acoustic backscattering strength. At 40 kHz, raking perpendicular to the acoustic line-of-sight with a tine spacing ...

With ever increasing demand for the accurate engineering products, the control of surface texture has become more important. The measurement of surface roughness during machining process is critical for the automatic control of surface quality in computer-integrated manufacturing (CIM). Many methods of online measurement of surface roughness range from simple touch comparator to sophisticated o...

This paper examines the use of Light Interferometry and the relevant parameters used to measure copper surface roughness before and after oxide alternative. Also discussed are the limitations and drawbacks of some of the traditional measurement parameters as they apply to copper surface roughness for conductor loss and signal integrity characterization and process control. In the PCB industry, ...

objective: increased enamel surface roughness following orthodontic bracket debonding leads to increased plaque accumulation and enamel decalcification. therefore, different methods are employed to achieve smoother enamel surfaces after bracket debonding. this study compared enamel surface roughness following orthodontic bracket debonding and composite resin removal using white stone and tungst...