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Use of the JM- SPC software to statistical control of high pressure die casting production-variable valued data type

Mutwil J., Lehmann A., Kremens Ł., Gruszczyński P.

Archives of Foundry Engineering

2009

Vol. 9, iss. 3

95-102

Usefulness of the JM-SPC computer program for a statistical analysis of variable valued data proceeded from an Al-Si high-pressure die casting production processes was examined. An analysis subject were results of dimensional measurement of 16 casting dimensions systematically controlled on coordinate-measuring machine. For analysis two criterion have been used: 1) X-s control chart and the performance indicator of processes by using of two commonly used indices: potential process capability index (Cp) and process capability index (Cpk).