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The Supply of Jinan Steel Foundry Sand Quality Improvement Research

Author: DaiYong
Tutor: WenDeCheng
School: Shandong University
Course: Industrial Engineering
Keywords: Quality fluctuation Supplier quality management Minitab software Process capability index Casting original sand Control chart
CLC: TG221
Type: Master's thesis
Year: 2011
Downloads: 17
Quote: 0
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Abstract


With the new ideas of modern supply chain implemented, the supplier to manufacturing enterprise becomes more and more important. Manufacturing enterprise quality level is influenced more and bigger by the supplier’s quality level. Manufacturing enterprise quality management has been expanded to the entire supply chain of suppliers, strengthen the suppliers quality management is the inevitable way of manufacturing enterprise.This article through join quantity of water glass in the original sand used process is a starting point. On Minitab software and process capability index reflect the concept of sodium silicate addition amount, and find out the volatility of sand. The quality of the volatility by subdividing the original sand quality having the biggest impact is sand grain size, silt content and water content three index. Through The process capability index of this three index find three suppliers in the process of sand supplier’s unqualified project. On Minitab software to draw each index of control chart, and the histogram and I-MR control chart, to calculate the process capability index, contrasted with experience understand, find out the reason of sand quality fluctuation.Contrasting the process capability index, sodium silicate addition amount is not steady state in the sand using process of three suppliers, volatility, the supply quality of original sand is a need to further improve.Through the further research of the production process, find out the existing problems in suppliers product process, including the original placers source choice, washing time and water and the drying time and temperature size.Research the casting original sand quality volatility. Being the basis of several main index volatility around the idea of combining modern supplier management, Analyzing the supply of Jinan steel group sand quality management system to find out some existing problems in the quality control from the thoughts, quality control system of the operation, quality control personnel working condition, methods and equipment used, and find out the corresponding measures to improve it.For a single purchasing department in quality management improvement for the new many departments jointly quality management increases the new management system of the program design, and the supplier on-site stationed engineers to help suppliers improve working procedure quality management, reduce the original sand quality volatility.Follow up the implementation of the new quality management system, on Minitab software to the new management system implementation of the statistical analysis of the data again, rendering the control chart, histogram and I-MR control charts, and calculates the process capability index, to verify the effectiveness of the new system.Through the calculated the sand particle size, supply moisture content, and sodium silicate addition amount index of the process capability index can draw some new implementation effect of new quality management system. And to find out the questions still remain project again next to improve.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Casting > Casting of raw materials and preparation > Molding material
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