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2 Archives of Foundry Engineering

2 2009

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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).

Statistical control of machined high pressure die casting geometry by using of JM-SPC software

Mutwil J.

Archives of Foundry Engineering

2009

Vol. 9, iss. 4

141-148

Usefulness of newest version of the JM-SPC computer program for a statistical analysis of production processes was examined. An analysis subject were results of measurements of 16 geometrical features of an Al-Si high-pressure die casting systematically controlled after machining on a coordinate-measuring machine. For analysis two criterion have been used: 1) Xave control chart and 2) a performance indicator of processes expressed by two commonly used indices: potential process capability index (Cp) and process capability index (Cpk).