Study Contribution of Surface Quality Parts Machined by Turning Using Hard Materials

2016 ◽  
pp. 289-297
Author(s):  
Razika Aouad ◽  
Idriss Amara
Keyword(s):  
Surface Quality ◽  
Hard Materials

Modeling of Force on Axial Power Ultrasonic Honing

2013 ◽  
Vol 690-693 ◽  
pp. 2470-2474
Author(s):  
Zhen Liu ◽  
Xi Jing Zhu ◽  
Jin Qing Wang ◽  
Yun Peng Shao
Keyword(s):  
Surface Quality ◽  
Material Removal ◽  
Cylinder Liner ◽  
Processing Parameters ◽  
Force Model ◽  
Physical Change ◽  
Hard Materials ◽  
Good Surface ◽  
Engine Cylinder ◽  
Power Ultrasonic

Ultrasonic vibration machining is a kind of effective method for precision processing of brittle-hard materials, especially it can obtain good surface quality in engine cylinder liner precision processing with the power ultrasonic honing. Based on the material removal mechanism of ultrasonic honing, a new ultrasonic honing force model was established, which included material chip deformation and friction situation between grains and workpiece. Therefore the effect to honing force can be known clearly with processing parameters and material physical change, which provided theory foundation to further study in ultrasonic mechanism and real time surface quality protection in honing process.

The Metal Sheets Processed by AWJ. Analysis of the Surface Quality

2013 ◽  
Vol 837 ◽  
pp. 201-205 ◽  
Author(s):  
Carol Schnakovszky ◽  
Eugen Herghelegiu ◽  
Nicolae Catalin Tampu
Keyword(s):  
Surface Quality ◽  
High Speed ◽  
Experimental Tests ◽  
Water Jet ◽  
Machining Process ◽  
Abrasive Water Jet ◽  
Hard Materials ◽  
Water Jet Cutting ◽  
Metal Sheets

Abrasive water jet (AWJ) is a nonconventional machining process in which abrasive grains in a high-speed water jet collide with the sample and erode it. This technology has been developed as an alternative to the conventional processes in order to facilitate the processing of hard materials as stainless steel, titanium alloys, composite materials, etc. However, it is not limited only to hard materials, since it has been successfully applied to process softer materials as aluminum, copper, plastics. Also, the abrasive water jet technology can be used both, to process thin metal sheets and plates since it offers many advantages such as: good surface quality, no thermal distortions, minimal burrs, low machining force, high flexibility. The aim of the current paper was to study the surfaces quality of samples made by aluminium, A1050, processed by AWJ in case of using different working regimes. The experimental tests have been performed on the Hydro-jet Eco 0615 water jet cutting machine. The parameters that have been varied were pressure, feed rate, abrasive quantity, distance between the cutting head and working sample while the diameter of focusing tube and diameter of water nozzle have been kept constant. The parameters taken into account to quantify the quality of the processed surface were those defined in the ISO/WD/TC 44 N 1770 standard (fig. 1): width of the processed surface at the jet inlet (Li), width of the processed surface at the jet outlet (Lo), deviation from perpendicularity (u), inclination angle (α) and roughness (Ra).

Effect of Nanoparticle Lubrication in Diamond Turning of Reaction-Bonded SiC

2011 ◽  
Vol 5 (3) ◽  
pp. 307-312 ◽  
Author(s):  
Jiwang Yan ◽  
◽  
Zhiyu Zhang ◽  
Tsunemoto Kuriyagawa
Keyword(s):  
Tool Wear ◽  
Surface Quality ◽  
Film Formation ◽  
Diamond Turning ◽  
Cu Nanoparticles ◽  
Lubricating Grease ◽  
Workpiece Surface ◽  
Hard Materials ◽  
Lubricating Film

Lubrication is a key issue in diamond turning of hard materials. This paper explores the feasibility of nanoparticle lubrication in diamond turning of reaction-bonded SiC. Four types of nanoparticles were dispersed in lubricating grease and applied to a workpiece surface. Results showed that the type and concentration of dispersed nanoparticles significantly affected lubricating performance. Grease containing 10% Cu nanoparticles produced the highest surface quality and the lowest tool wear. Lubrication is discussed in terms of nanoparticle-induced solid lubricating film formation at the tool-workpiece interface.

Measurements in 3D images

1991 ◽  
Vol 49 ◽  
pp. 408-409
Author(s):  
John C. Russ
Keyword(s):  
Three Dimensional ◽  
Image Plane ◽  
X Rays ◽  
Traditional Use ◽  
3D Images ◽  
Confocal Scanning Laser Microscope ◽  
Hard Materials ◽  
Depth Direction ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

Three-dimensional (3D) images consisting of arrays of voxels can now be routinely obtained from several different types of microscopes. These include both the transmission and emission modes of the confocal scanning laser microscope (but not its most common reflection mode), the secondary ion mass spectrometer, and computed tomography using electrons, X-rays or other signals. Compared to the traditional use of serial sectioning (which includes sequential polishing of hard materials), these newer techniques eliminate difficulties of alignment of slices, and maintain uniform resolution in the depth direction. However, the resolution in the z-direction may be different from that within each image plane, which makes the voxels non-cubic and creates some difficulties for subsequent analysis.

The specification of surface quality—quo vadis?

1972 ◽  
Vol 51 (5) ◽  
pp. 171 ◽  
Author(s):  
J. Halling
Keyword(s):  
Surface Quality ◽  
Quo Vadis

Improved surface quality of rotation symmetric structures by excimer laser micromachining

1997 ◽  
Author(s):  
H. K. Tönshoff ◽  
C. Graumann ◽  
M. Rinke ◽  
P. Lonergan ◽  
J. Wais
Keyword(s):  
Surface Quality ◽  
Excimer Laser ◽  
Laser Micromachining ◽  
Rotation Symmetric ◽  
Symmetric Structures

AL 468 ALLOY

Alloy Digest ◽  
1995 ◽  
Vol 44 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Surface Quality ◽  
Heat Treating ◽  
Temperature Performance ◽  
Chromium Stainless Steel

Abstract AL 468 is an 18% chromium stainless steel with dual stabilization by titanium and columbium. Small angular carbonitrides of both titanium and columbium are randomly dispersed, but develop improved surface quality, strength, and oxidation resistance when compared to Type 439. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-597. Producer or source: Allegheny Ludlum Corporation.

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