The principle of building a unified control card for the dimensional accuracy of engineering products
Abstract
DOI 10.32820/2079-1747-2018-22-114-120
The issues of creating a tool for quality control of manufacturing parts with dimensional accuracy in order to prevent the appearance of defects are considered.
As a result of research, the theoretical apparatus of probability theory and mathematical statistics was used. Using the proposed general model of the distribution of linear dimensions of parts
and found estimates of its parameters allows us to find the mathematics expectation and variance of
the largest absolute deviation of size from the nominal size. On the basis of the obtained calculations, a control card is constructed; it allows one to determine the largest value at which it is necessary to stop production of products without going outside the tolerance field. The use of the proposed results makes it possible to determine the frequency of intervention in the process, where the
spread of linear dimensions increases with time and the error in estimating boundaries with the
number of manufactured products decreases. The results obtained make it possible to control the
accuracy of manufacturing machine parts during their machining
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References
Noskievicova, D & Woska B 2014, ‘Design of Methodology for Application of Statistical Control on Short Run Process in Metallurgy’, Metallurgy, Hrvatsko metalursko drustvo, vol.1, pp. 81-84.
Lamnaujer, NJu 2011, ‘Kontrolnaja karta dlja razlichnyh kvalitetov tochnosti’, Skhidno-Yevropeiskyi zhurnal peredovykh tekhnolohii, no. 3/7 (51), pp. 23-26.
Lamnaujer, NJu 2013, ‘Zahalna model rozpodilu liniinykh rozmiriv detalei ta yü zastosuvannia dlia polipshennia yakosti vyrobiv’, Visnyk Natsionalnoho tekhnichnoho universytetu Kharkivskyi politekhnichnyi instytut, Tematychnyi vypusk Matematychne modeliuvannia v tekhnitsi ta tekhnolohiiakh, Natsionalnyi tekhnichnyi universytet Kharkivskyi politekhnichnyi instytut, Kharkiv, no. 54, pp. 134-143.
Lamnaujer, NJu 2012, ‘Model raspredelenija razmerov izdelij i ee primenenie dlja ocenki tochnosti obrabotki’, Visnyk Natsionalnoho tekhnichnoho universytetu Kharkivskyi politekhnichnyi instytut, Tematychnyi vypusk Matematychne modeliuvannia v tekhnitsi ta tekhnolohiiakh, Natsionalnyi tekhnichnyi universytet Kharkivskyi politekhnichnyi instytut, Kharkiv, no. 27, pp. 98-107.
Dejvid, G 1979, Porjadkove statistiki, Nauka. Glavnaja redakcija fiziko-matematicheskoj literatury,
Moskva.
