• CN:11-2187/TH
  • ISSN:0577-6686

›› 2013, Vol. 49 ›› Issue (6): 103-113.

• 论文 • 上一篇    下一篇

复杂产品制造精度控制的数字化方法及其发展趋势

林忠钦;来新民;金隼;王皓;朱利民;陈关龙   

  1. 上海交通大学机械与动力工程学院
  • 发布日期:2013-03-20

Digital Methods of Complex Product Manufacturing Precision Control and Its Development Trend

LIN Zhongqin;LAI Xinmin;JIN Sun;WANG Hao;ZHU Limin;CHEN Guanlong   

  1. School of Mechanical Engineering, Shanghai Jiao Tong University
  • Published:2013-03-20

摘要: 汽车车身、发动机等复杂产品通常要经历数十道乃至上百道加工工序,零件毛坯偏差、机床误差、夹具定位误差以及操作、环境等因素引起的误差在制造过程中传递和累积形成产品综合偏差,并最终影响产品整体性能和市场竞争力。面向工艺设计的线外质量控制,根据产品结构和质量要求,确定制造过程工位布置以及工艺参数;面向工艺过程控制的线内质量控制,则根据制造过程中所出现的尺寸偏差问题,确定尺寸偏差根源并采取相应工艺控制措施,两者相辅相成共同推动制造质量的提升。数字化方法是实现产品制造精度控制的关键。结合汽车车身、发动机制造精度控制的理论研究和工程实践,阐述复杂产品制造精度控制的科学内涵和技术要点。基于描述多工位制造过程偏差产生、传递、累积与湮没的偏差流理论,提出复杂产品制造精度数字化控制的总体框架。从数字化工艺设计和数据驱动的工序控制两方面,总结和归纳面向线外质量控制的产品制造工艺数字化设计方法和面向线内质量控制的复杂产品制造工艺过程控制方法。针对高端装备和高性能产品的制造需求,展望了复杂产品质量控制的发展趋势。

关键词: 复杂产品, 汽车车身, 汽车发动机, 数字化工艺设计, 质量控制

Abstract: The complex product manufacturing, e.g., autobody and engine, usually need dozens or even hundreds of manufacturing processes. Blank deviations, machine tool errors, jig positioning errors and errors by operating environment caused have been transfered, accumulated and formed product comprehensive deviation in the manufacturing process, and ultimately affect the product performance and market competitiveness. On the one hand, the manufacturing process station layout and process parameters are determined according to the product structure and quality requirements for technological design of the off-line quality control, on the other hand, the size deviation root caused and taked corresponding process control measures are determined at the instance of the size deviation in the manufacturing process for on-line quality control. Both complements promote the ascension of the manufacturing quality. Digital method play a key role in improving product accuracy of manufacturing. According to the theoretical and applied researches on the dimensional control of auto-body and engine, the scientific connotation and key techniques of dimensional control of complex products is explained. The general frame-work of digital dimensional control methods for manufacturing complex products is proposed based on the stream of variation theory(SOV), which describes the laws of generation, transmission, accumulation and absorption of variations in multi-station manufacturing processes. Then, the two-stage dimensional control of complex product is summarized. In the stage of product process development, the digital process design method is used to synthesize the product and tooling tolerance. In the stage of product manufacturing, the data-driven process control method is used to improve the process stability. Some thoughts are given on the development and trend of quality control techniques for high-end equipment and high performance products.

Key words: Auto-body, Automobile engine, Complex product, Digital process design, Quality control

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