Theoretical and experimental investigation of grinding marks in sphere NC grinding process

2014 ◽  
Author(s):  
Peng Wang ◽  
Hao Zhang ◽  
Changshun Hui
Keyword(s):  
Experimental Investigation ◽  
Grinding Process ◽  
Nc Grinding

Experimental Investigation of Microcutting Mechanisms in Marble Grinding

2009 ◽  
Vol 131 (6) ◽  
Author(s):  
LJ. Tanovic ◽  
P. Bojanic ◽  
R. Puzovic ◽  
S. Klimenko
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Cutting Force ◽  
Surface Finish ◽  
Normal Component ◽  
Natural Material ◽  
Grinding Process ◽  
Force Component ◽  
Diamond Grain

This paper offers an experimental study of the microcutting mechanisms in marble grinding to aid the optimization of the marble grinding process. The necessity for investigating these mechanisms is dictated by the increased use of marble in many applications and the fact that grinding and polishing processes are the dominant technologies used to meet surface finish requirements in this natural material. The experiments are aimed at the determination of the normal component of the cutting force and of the grain traces in microcutting with a single diamond grain. The investigations carried out make provisions for establishing critical grain penetration and cutting depths and allow the prediction of the normal cutting force component as a function of grain penetration speed and depth.

Nonlinearity Analysis and Wavelet Package Transform of Measured Chatter Vibrations in Grinding Process

2007 ◽  
Vol 359-360 ◽  
pp. 494-498 ◽  
Author(s):  
Qing Kai Han ◽  
Bang Chun Wen
Keyword(s):  
Fractal Dimensions ◽  
Numerical Control ◽  
Grinding Process ◽  
Frequency Spectra ◽  
Frequency Bands ◽  
Special Alloy ◽  
Chatter Vibrations ◽  
Scaled Energy ◽  
Grinding Machine ◽  
Nc Grinding

In grinding process, chatter vibrations known as self-excited vibrations, become increasingly problematic and must be avoided. Firstly, experimental measurements of chatter vibrations in a numerical control (NC) grinding machine tool are introduced for the case of a special alloy workpiece being carried on. Then, frequency spectra of chatter vibrations are analyzed. The wavelet package transform technique is used to describe original chatter signals in the term of scaled energy of frequency bands. At last, fractal dimensions of the reconstructed signals in consecutive frequency bands of chatter vibrations are calculated. These results are helpful for understanding of the nonlinearity of chatter vibrations.

Experimental Investigation of Residual Stresses after Heat Treatment and Grinding Processes in the Production of Ball Bearing Rings

2008 ◽  
Vol 571-572 ◽  
pp. 27-32 ◽  
Author(s):  
Volkan Güley ◽  
A. Erman Tekkaya ◽  
Turhan Savaş ◽  
Feridun Özhan
Keyword(s):  
Heat Treatment ◽  
Experimental Investigation ◽  
Residual Stresses ◽  
Process Parameters ◽  
Treatment Process ◽  
Ball Bearing ◽  
Grinding Process ◽  
Heat Treatment Process ◽  
Grinding Processes ◽  
Bearing Rings

Experimental investigation of residual stresses after heat treatment and grinding processes in the production of ball bearing rings has been carried out. The residual stresses were measured by X-ray diffraction method utilizing chromium radiation, which has an average penetration depth of 5 μm incident on 100Cr6 (AISI-E52100) ball bearing steel. The process parameters of heat treatment and grinding processes were varied so as to represent the extreme values that can be applied in the respective processes. Hardness and percent retained austenite limit the heat treatment process parameters; while roundness, surface roughness and form the grinding process. Tensile surface residual stresses on the raceway of ball bearing rings changes to compression after grinding in both circumferential and axial directions. In grinding relatively higher compressive stresses were measured in axial direction compared to the circumferential direction. This experimental investigation also showed that the influence of heat treatment process parameters on the magnitude and distribution of residual stresses survived even after grinding process; i.e. heat treatment and grinding processes cannot be evaluated independently in process design for favourable residual stresses.

Experimental Investigation and Parameter Optimization of Micro Holes Machining on Ti-6Al-4V Alloy

2015 ◽  
Vol 813-814 ◽  
pp. 332-336
Author(s):  
R.A. Aravind ◽  
Shivakumar Ganesh ◽  
Syed Mohammed Yasir ◽  
G. Madhan Mohan ◽  
Vijayan Krishnaraj ◽  
...  
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Process Parameters ◽  
Electric Discharge ◽  
Optimum Process ◽  
Grinding Process ◽  
Taguchi’S Method ◽  
Electro Discharge Machining ◽  
Micro Holes ◽  
Variance Approach

This paper presents an experimental study on the diametrical overcut and taper obtained during the machining of micro holes by electro-discharge machining (EDM). Many trials were taken by machining a 2.0 mm electrolytic copper rod to 0.50 mm under various conditions to analyse the effect of process parameters by wire electric discharge grinding process (WEDG). The optimum process parameters were determined by Taguchi’s method. Then a set of electrodes were produced with the determined optimum process parameters and were used to machine micro holes on Ti-6Al-4V alloy. The diameters of the holes were measured and the effects of various parameters were analysed for the variation in taper and diametrical overcut. The experimental results were analysed using analysis of variance approach.

Experimental investigation on high-shear and low-pressure grinding process for Inconel718 superalloy

2020 ◽  
Vol 107 (7-8) ◽  
pp. 3425-3435 ◽  
Author(s):  
Yebing Tian ◽  
Linguang Li ◽  
Bing Liu ◽  
Jinguo Han ◽  
Zenghua Fan
Keyword(s):  
Experimental Investigation ◽  
Low Pressure ◽  
Grinding Process ◽  
High Shear

Time Series Model Study on the NC Grinding Process of Isometric Polygonal Profile

2004 ◽  
Vol 471-472 ◽  
pp. 518-522 ◽  
Author(s):  
De Sheng Wang ◽  
Ai Ping Zhou ◽  
Pan Ling Huang ◽  
X.Y. Zhao
Keyword(s):  
Time Series ◽  
Machine Tools ◽  
Time Series Model ◽  
Step Motor ◽  
Grinding Process ◽  
Technical Problems ◽  
Model Study ◽  
Grinding Machine ◽  
Nc Grinding ◽  
Polygonal Profile

This paper studies the NC grinding process for Isometric Polygonal Profiles (IPP) with self-made machine tools accessories, and establishes the time series model of the grinding process by means of measuring and analyzing the vibratory signal in the grinding process. The grinding experiment indicates that the surface formative motions of IPP can be achieved with the step-motor-driven accessories and it is reasonable to design the grinding machine for IPP according to the principle. This method solves the technical problems in IPP NC processing and can act as an important elicitation and illustration for NC processing other polygonal profiles.

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