Surface quality characterization of textile-reinforced thermoplastics

2000 ◽  
Vol 21 (4) ◽  
pp. 630-635 ◽  
Author(s):  
M. Neitzel ◽  
M. Blinzler ◽  
K. Edelmann ◽  
F. Hoecker
Keyword(s):  
Surface Quality ◽  
Reinforced Thermoplastics

Use of Wavelet Packet Transform in Characterization of Surface Quality

2007 ◽  
Vol 46 (15) ◽  
pp. 5152-5158 ◽  
Author(s):  
J. Jay Liu ◽  
Daeyoun Kim ◽  
Chonghun Han
Keyword(s):  
Surface Quality ◽  
Wavelet Packet ◽  
Wavelet Packet Transform

Characterization of short-fibre reinforced thermoplastics for fracture fixation devices

Biomaterials ◽  
1990 ◽  
Vol 11 (8) ◽  
pp. 541-547 ◽  
Author(s):  
Stanley A. Brown ◽  
Robert S. Hastings ◽  
Jeffrey J. Mason ◽  
Abdelsamie Moet
Keyword(s):  
Fracture Fixation ◽  
Short Fibre ◽  
Fixation Devices ◽  
Reinforced Thermoplastics

ASPHERO5 – Simulation and Analysis of Aspherical Polishing Process

2007 ◽  
Vol 364-366 ◽  
pp. 488-492 ◽  
Author(s):  
Rainer Boerret ◽  
Andreas Kelm ◽  
Helge Thiess ◽  
Volkmar Giggel
Keyword(s):  
Surface Quality ◽  
Removal Rate ◽  
Limiting Factors ◽  
Polishing Process ◽  
Power Spectral ◽  
Starting Point ◽  
German Research ◽  
First Results ◽  
Simulation And Experiment

ASPHERO5 is a funded German research project (project prime: Schneider OpticalMachines) with the goal of economic fabrication of high precision aspheres. The research is concentrated on the classical process chain consisting of grinding and polishing. The characterization of the incoming and outgoing surface quality is one issue to characterize the improvements. The variation of the local removal rate related to local curvature is one of the limiting factors of the polishing process. In this paper we report on first results characterizing the surface quality with a PSD (Power Spectral Density) algorithm and analyzing the local removal rates for the polishing step. In our research, two types of aspheres with 30 and 60 mm diameter were polished with a spinning tool process. The final deviation between simulation and experiment was less than 10 percent. That’s the starting point for further investigations within the project.

Surface Quality of Cavities Obtained by EDM Process

2011 ◽  
Vol 223 ◽  
pp. 931-939
Author(s):  
Rodrigo Panosso Zeilmann ◽  
Gerson Luiz Nicola ◽  
Fernando Moreira Bordin ◽  
Tiago Vacaro ◽  
Mariana Czarnobay Zanotto
Keyword(s):  
Surface Quality ◽  
Electrical Discharge Machining ◽  
Subsurface Layer ◽  
Side Wall ◽  
Machining Processes ◽  
Electrically Conductive ◽  
Machined Parts ◽  
Edm Process

The electrical discharge machining (EDM) is a process widely used in machining of complex geometries and hardened materials, conditions that often are not met by conventional machining processes. In EDM the electrode reproduces its image or geometry on the part and this image is obtained by chip removing process, which is given by high frequency electrical discharges, causing the melting and vaporization of electrically conductive materials. Due to this mechanism of material removal, the surface is subjected to high thermal loads, which heavily influences the surface quality of obtained parts. For the characterization of these surfaces must be considered the surface topography and the metallurgical changes of the subsurface layer, since both characteristics influence the functionality of the machined parts. In addition, several variables related to the EDM process have influence on the characteristics of the generated surface. This work presents a study of the influence of EDM process on the surface quality of square cavities. It was evaluated different regions of the cavities, such as side wall, bottom and corners. The results showed significant differences between the analyzed regions.

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