基于SPC的汽车发动机加工品质控制方法研究

发布时间：2018-04-03 19:25

本文选题：发动机　切入点：加工品质　出处：《北京交通大学》2017年硕士论文

【摘要】：随着社会经济地飞速发展,为满足消费者在汽车行业的需求,汽车行业不断细分,汽车品种不断增加。因此,汽车的生产周期缩短,缸体、缸盖、曲轴种类越来越多。传统质量控制方式采用手动检具检测,适用于大批量生产,难以适应品种更新较快的新形势,因此,目前发动机质量控制方式正面临着巨大挑战。统计过程控制技术(Statistical Process Control,简称SPC)是基于工件检测数据对其品质进行判断,更能从本质上发现质量问题产生的根源,从而得到了越来越多生产企业的重视。本文利用SPC技术对发动机加工品质控制进行研究,目的在于结合全面质量管理理论及HM公司实际情况,建立一套基SPC的汽车发动机加工品质的控制方法。本文研究的SPC技术其原理是通过采集生产制造过程中大量数据,并利用多种统计学手段进行分析,通过工件检测数据建立控制图,以此来判定生产过程是否处于稳定状态。论文建立了一套基SPC的汽车发动机加工品质的控制方法,并进行了应用验证。本文通过分析HM公司发动机加工品质特点,提出基于SPC的质量控制方法的必要性,为验证SPC技术对发动机加工质量控制的作用,将SPC技术在HM公司沧州发动机工厂进行应用,并对其应用结果及影响因素进行了研究,同时,为进一步提高质量管控预测精度,本文采用了大数据理论,利用支持向量机对发动机加工质量进行判别分类。本文的主要工作如下:1.通过介绍国内外发动机加工质量控制现状,分析质量控制技术研究意义。2.分析统计过程控制技术质量控制理论,主要包括SPC的基本思想,控制图概念及质量控制应用原理。3.介绍HM公司发动机加工质量的影响因素,并对HM不同分公司的加工品质进行了对比分析,并根据沧州工厂实际生产特点提出一套基于SPC的质量控制方法。4.针对本文提出的质量管控方法,本文重点分析了抽样检验统计理论,质量检测新规则的采用,同时本文采用了大数据理论,利用SVM技术进一步提高了质量预测精度。5.对基于SPC的控制方法在HM公司发动机机加工的应用及加工影响进行了研究,结果证明,本文提出的基于SPC的控制方法可有效控制发动机加工质量,进一步验证了 SVM的有效性。
[Abstract]:With the rapid development of social economy, in order to meet the needs of consumers in the automotive industry, the automotive industry continues to subdivide, and the variety of cars is increasing.As a result, automobile production cycle is shortened, cylinder block, cylinder head, crankshaft more and more types.The traditional quality control method adopts manual inspection, which is suitable for mass production, and it is difficult to adapt to the new situation of fast variety renewal. Therefore, the engine quality control mode is facing a great challenge at present.Statistical Process Control (SCC) is a statistical process control technology, which judges the quality of workpiece based on the inspection data, and can find the root cause of the quality problem in essence, which has been paid more and more attention to by more and more manufacturing enterprises.In this paper, the SPC technology is used to study the quality control of engine processing. The purpose of this study is to establish a set of SPC based control methods for automotive engine processing quality in combination with the theory of total quality management and the actual situation of HM Company.The principle of the SPC technology studied in this paper is to determine whether the production process is in a stable state by collecting a large number of data in the manufacturing process, analyzing by a variety of statistical means, and establishing a control chart through the workpiece detection data.In this paper, a control method of automobile engine machining quality based on SPC is established, and its application is verified.By analyzing the characteristics of engine processing quality of HM Company, this paper puts forward the necessity of quality control method based on SPC. In order to verify the effect of SPC technology on engine processing quality control, SPC technology is applied in Cangzhou engine Factory of HM Company.At the same time, in order to improve the prediction accuracy of quality control, big data theory and support vector machine are used to distinguish and classify the engine machining quality.The main work of this paper is as follows: 1.This paper introduces the status quo of engine machining quality control at home and abroad, and analyzes the significance of research on quality control technology.This paper analyzes the quality control theory of statistical process control technology, including the basic idea of SPC, the concept of control chart and the application principle of quality control.This paper introduces the influencing factors of engine processing quality in HM Company, compares and analyzes the processing quality of different HM branches, and puts forward a set of quality control methods based on SPC according to the actual production characteristics of Cangzhou factory.In view of the quality control method proposed in this paper, this paper focuses on the analysis of sampling inspection statistics theory and the adoption of new rules for quality inspection. At the same time, big data theory is adopted in this paper, and the quality prediction accuracy is further improved by using SVM technology.The application and influence of SPC based control method in HM engine machining are studied. The results show that the proposed control method based on SPC can effectively control the quality of engine machining and further verify the effectiveness of SVM.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：F273.2;F426.471

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