scholarly journals Observation of surface roughness on three types of resin based on grinding time of dental automatic barrel finishing

2021 ◽  
Vol 43 (2) ◽  
pp. 56-61
Author(s):  
An-Na Jung ◽  
Hyeon-Jeong Ko ◽  
Yu-Jin Park
Keyword(s):  
Surface Roughness ◽  
Barrel Finishing ◽  
Grinding Time

Research on the Mechanism of Coordinate Polishing Crankshaft Crankpin with Abrasive Belt

2011 ◽  
Vol 487 ◽  
pp. 457-461 ◽  
Author(s):  
M. Zhang ◽  
Yun Huang ◽  
L. Zhang
Keyword(s):  
Surface Roughness ◽  
Constant Velocity ◽  
Horizontal Displacement ◽  
Schematic Diagram ◽  
Uniform Rotation ◽  
Swing Angle ◽  
Abrasive Belt ◽  
Long Time ◽  
The Relationship ◽  
Grinding Time

Under the conditions of crankshaft uniform rotation, the schematic diagram of coordinate polishing crankpin was analyzed and found that the grinding time and speech changed, when the abrasive grinded crankpin. At the same time, the surface roughness was the relevant with the grinding time, grinding for a long time the roughness value was low, grinding time was short then the roughness value was high. In order to ensure that the surface roughness was homogeneity, so that the abrasive grinded the grinding point in the same time, in other words, the abrasive grinded crankpin in the constant velocity. And then the abrasive grinding crankpin was analyzed in the constant velocity, the crankshaft angle was draw the relationship between horizontal displacement and the swing angle. Simultaneity, adopted the level cylinder and the oscillating cylinder mutual moving, that resulted in the mechanism following the rotation of crankshaft back and forth movement, it was due to the weight of mechanism and the lag of the cylinder, and finally the mechanism of lag error was analyzed.

Deburring of Sheet Metal by Barrel Finishing

2007 ◽  
Vol 344 ◽  
pp. 193-200 ◽  
Author(s):  
Alberto Boschetto ◽  
Armando Ruggiero ◽  
Francesco Veniali
Keyword(s):  
Surface Roughness ◽  
Experimental Investigation ◽  
Sheet Metal ◽  
Process Parameters ◽  
Working Time ◽  
Thin Sheets ◽  
Secondary Operation ◽  
Barrel Finishing ◽  
Technological Model ◽  
Local Deformations

In sheet metal processes the burrs cannot be completely eliminated during the process but can be minimized by optimization of the process parameters. Hence the deburring often becomes an essential secondary operation. Most of the deburring operations are hand-made and therefore several manufacturers tend to eliminate these tedious and labor-intensive operations due to time and cost issues. Moreover, clamping problems can arise which, together with the deburring forces, can induce dimension alterations and local deformations, particularly for thin sheets. Barrel finishing is an old technique commonly used to improve the surface roughness of complicated parts, but can find interesting applications also in the deburring. Aim of this work is to present an experimental investigation on the deburring of sheet metal performed by barreling. A technological model has been developed in order to assess the height of the burr as a function of the initial burr and of the working time.

Mass Finishing of Parts Produced by Direct Metal Laser Sintering

Volume 3 ◽  
2004 ◽  
Author(s):  
A. Boschetto ◽  
F. Veniali ◽  
F. Miani
Keyword(s):  
Surface Roughness ◽  
Industrial Process ◽  
Mechanical Action ◽  
Laser Sintering ◽  
Main Process ◽  
Direct Metal Laser Sintering ◽  
Complicated Shape ◽  
Mass Finishing ◽  
Barrel Finishing ◽  
Established Technique

This paper presents some practical considerations on finishing of parts made by direct metal laser sintering (DMLS). The main process capabilities limitations of this promising rapid tooling technique are in fact in the surface roughness of the produced parts. This fact hinders the introduction of DMLS as a widely employed industrial process, especially for what concerns the production of moulds and inserts and allows their use only as preseries tools in injection moulding of plastics, since the requirements for preseries tools are worse than those needed during the process. Barrel finishing, in turn, is a well established technique to improve the roughness of parts of complicated shape by means of a soft mechanical action over the surface. The results herewith presented show that it is possible to achieve roughness of the order of 1 μm Ra even when starting from initial roughness of the order of 15 μm Ra, i.e. those typically attained by DMLS.

Experimental Research on the Abrasive Belt Grinding Blades Material 1Cr13 Stainless Steel

2010 ◽  
Vol 148-149 ◽  
pp. 130-135
Author(s):  
Chun Qiang Yang ◽  
Yun Huang ◽  
Zhi Huang ◽  
Xiao Zhen Li
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Abrasive Wear ◽  
Wear Mechanisms ◽  
Influence Factors ◽  
Great Influence ◽  
Grinding Force ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
Grinding Time

Blades are the key parts of turbines. The materials used for making blades have many excellent performances such as high intensity, corrosion resistant and temperature resistant. They are of hard to machine materials. However, there is little information available in the literature related to abrasive belt grinding blades materials. And its mechanisms have not yet been fully explained. This paper aims to make a contribution to the understanding of the wear mechanisms of the abrasive belt and its influence factors. A series of tests were conducted on 1Cr13 stainless steel. The surface roughness and the surface topography of abrasive wear were observed. The influences of grinding force and grinding time on surface roughness were discussed. The wear mechanisms are revealed based on the model of abrasive grain’s wear. It revealed that existence of an optimum surface roughness reachable dependent of the grinding force and grinding time. It has also been shown that the type of abrasive and grinding depth have great influence on abrasive wear.

Surface roughness improvement of cast components in vacuum moulding by intermediate barrel finishing of fused deposition modelling patterns

2016 ◽  
Vol 231 (2) ◽  
pp. 309-316 ◽  
Author(s):  
Rupinder Singh ◽  
Manjinder Singh
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Acrylonitrile Butadiene Styrene ◽  
Green Manufacturing ◽  
Fused Deposition Modelling ◽  
Fused Deposition ◽  
Vacuum Moulding ◽  
Master Pattern ◽  
Barrel Finishing ◽  
Sand Grain Size

In this work, investigations have been made for surface roughness (Ra) improvement of vacuum moulding (VM) components by introducing barrel finishing (BF) on fused deposition modelling patterns at preliminary stage (i.e. before being used as master patterns). The Ra improvement will help to avoid/reduce post machining/finishing operations for green manufacturing. The VM master patterns were prepared using P-430 grade acrylonitrile butadiene styrene material on commercial fused deposition modelling setup. Further, Ra of VM master pattern prepared was improved by using BF process (as intermediate process). The controllable parameters of BF and VM process (namely, media weight, cycle time, vacuum pressure and grain size of refractory sand) were studied at three levels by using Taguchi L9 orthogonal array to explore their affects on Ra of the final cast components. The results of study suggest that media weight of BF and sand grain size of VM process contribute significantly for improving Ra.

Microremoval modeling of surface roughness in barrel finishing

2013 ◽  
Vol 69 (9-12) ◽  
pp. 2343-2354 ◽  
Author(s):  
A. Boschetto ◽  
L. Bottini ◽  
F. Veniali
Keyword(s):  
Surface Roughness ◽  
Barrel Finishing

Finishing Characteristics in Barrel Finishing of Centrifugal Disc Type on Flow-Through System

2009 ◽  
Vol 76-78 ◽  
pp. 300-305 ◽  
Author(s):  
Koichi Kitajima ◽  
Akihiro Yamamoto ◽  
Shinji Takahashi ◽  
Masatomo Watanabe
Keyword(s):  
Surface Roughness ◽  
Copper Alloy ◽  
Plain Carbon Steel ◽  
Plain Water ◽  
Triangular Prism ◽  
Batch System ◽  
The Media ◽  
Flow Through ◽  
Stock Removal ◽  
Barrel Finishing

For the improvement of the performance in centrifugal disc finishing, the flow-through system for supplying the compound solution is tried and its influences on finishing characteristics are experimentally investigated. Workpieces (22 mm in diameter and 15 mm in thickness) of plain carbon steel (S45C in JIS), aluminum alloy (A2017) and copper alloy (C3604) are finished with ceramic media (Equilateral triangular prism 6 mm in side and 5 mm in thickness). The conclusions are summarized as follows; The compound solution has more influences on finishing characteristics than plain water. It makes the relative stock removal larger and the surface roughness smaller than the water. The relative stock removal and the media weight loss on the flow-through system are larger than those on the batch system.

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