COMPUTER CONTROL THE ACCURACY OF THE PARTS PROCESSED ON CNC MACHINE TOOLS BASED ON STATISTICAL PROCESS CONTROL

Angel Lengerov, Galina Nikolcheva, Julieta Kaleycheva, Lyubomir Lazov

Abstract


Statistical process control (SPC) can help manufacturers improve the quality of their products. This paper describes a relatively simple and effective method and algorithm to adjust the accuracy of parts produced on CNC machine tools using the methods of statistical process control. Examined the possibilities of the proposed method by computer simulation of the process. By using the proposed algorithm scattering of size is placed in the middle of the tolerance zone. Various variants carrying out the method are proposed adequate on the machining time during processing details in the sample. This can optimize the total time for processing of the batch.

Keywords


machining; CNC machine tools; computer control; statistical control

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References


W. Cochran, Sampling Techniques. Third ed. Wiley,1977.

М. Enchev and S. Koleva, Transitional process in initial dimensional setting with setup of details. Х International Congress "Machines, technologies, materials», September , 18-20, Varna, Bulgaria, 2013.

P. Hadjiski and C. Kaldashev, Programming of CNC machine tools with CAM systems. Technical University-Sofia, 2017.

A..R Fazeli and E. Sharifi, Statistical Control and Investigation of Capability of Process and Machine in Wire Cut . EDM Process of Gas Turbine Blade Airfoil Tip. Engineering. 2011; 3: 260-265. http://www.SciRP.org/journal/eng [Accessed 2011].

G.Falsone and D. Settineri, On the application of the probability transformation method for the analysis of discretized structures with uncertain proprieties. Probabilistic Engineering Mechanics, 35, 2014 pp.44–51, doi: 10.1016 /j. probengmech. 2013.10.001

V.M. Nani, Statistical control of processing prismatic pieces on grinding machines, Measurement, 47, 2017, pp 516 – 520, (doi: 10.1016/ j.measurement. 2013.09.033

B. Ramamoorthy, V. Radhakrishnan, A.Weckenmann, M. Knauer and D.A. Geus, Improvement of machining accuracy on a CNC lathe through error prediction and compensation. in: XV IMEKO World Congress, June 13–18, Osaka, Japan (1999)

S. Kumar and S. T. Newman, Standardised Process Control System for CNC Manufacturing in: Advanced Design and Manufacturing Based on STEP, 2009, pp. 233-259.

S. Salapatieva, Technology research for active control Turning CNC. PhD Thesis. TU-Sofia, branch Plovdiv, 2005.




DOI: http://dx.doi.org/10.17770/etr2017vol3.2623

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