| Based on the case of study of the end walls' and the side walls' outsides paintthickness quality control of JJ plant, the paper puts forward some views andsuggestions to quality control lag after many state enterprises' technical revamping.Through intensive analyzing the control cartography's principle and effect of theStat. Process Control's SPC Theory, this paper expounds the Stat. Process Control'sSPC Theory's application in manufacturer production procedure, and confirms SPCtheories' scientificity and accuracy to control the lorry bodywork's paint thickness.Through sampling randomly online vehicles in paint production line, makingcontrol diagrams, observing average values and range change, and monitoring,analyzing production procedure, all these are in order to evaluate there existsabnormal factors or not. According to the sampling data, calculate workingprocedure's performance index, and evaluate its actual state. Make sure to adjustproduction requirement as the state of working procedure accordingly, implement theguideline of "finding out discrepancy, taking measures, pledging elimination, being inaccordance with criteria, eradicating its recurring", maintain the stable state ofworking procedure, and improve procedure capability on product quality so as tomake the paint thickness of lorry bodies' end-walls and side-walls' outsides steadyand ameliorative, and to boost up competition of product in market.Aiming at lorry paint thickness of JJ plant, this paper is strictly deduced by Stat.Process Control Theory, finds out the reason which causes the troubles of the lorrybody paint thickness on control cartography and performance index, and takesmeasures to reconstruct production line, and finally improves performance index ofproduction procedure, enhances control level of paint thickness rapidly. The controlsystem's successful study of paint thickness provides enterprise establishing scientificcontrol system after its technical revamping with an example. |
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