盛俏俏 蒋晶晶 林平 田伟 张红霞 祝成炎

摘要： 针对真丝倍捻生产中捻度不匀率控制及设备管理问题，文章提出了一种基于控制图技术的倍捻动态监测及质量控制方法。根据实际倍捻生产设计了锭速均值与锭速变异系数两个监控指标，并对指标进行了变异源、独立性及正态性分析，确定采用I-MR-R三向控制图对指标进行监控。结果表明：控制图可直观、有效地反映设备锭子转速和锭子间锭速不匀率的情况;可从短期和长期两个时间维度，监控预报机台锭速不匀率的小范围变化，监控捻度不匀变异情况;根据指标波动反映出的漂移量和漂移趋势，可为设备维修保养策略制定提供依据。I-MR-R三向控制图可以监控倍捻生产。

关键词： 倍捻;锭速不匀;捻度不匀;I-MR-R控制图;质量控制;漂移量;漂移趋势

中图分类号： TS142.222.522

文献标志码： A

文章编号： 1001-7003（2021）05-0034-07

引用页码： 051106

DOI： 10.3969/j.issn.1001-7003.2021.05.006（篇序）

Abstract： To address the problem of uneven control of twist and equipment management problems in double twist production of silk， a method for dynamic monitoring of double twist and quality control was proposed based on control chart technology. According to the actual production of double twist， two monitoring indexes of spindle speed mean value and spindle speed variation coefficient were designed. The analysis of the variation source， independence and normality data of the indexes was performed. It was determined to monitor indexes using I-MR-R three-direction control chart. The results showed that the control chart can directly and effectively reflect the rotating speed of spindle and the unevenness of spindle speed between spindles. From two time dimensions， short-term and long-term monitoring of the small-range change of the spindle speed unevenness and twist unevenness variation could be implemented. The drift distance and drift trend reflected by the fluctuation of index data can provide a basis for formulating equipment maintenance strategy. I-MR-R three-way control chart is feasible for monitoring the production of double twist of silk.

Key words： double twist; uneven spindle speed; twist irregularity; I-MR-R control chart; quality control; drift distance; drift trend

倍捻是真丝织物产品生产中的重要工序，捻度不匀率是倍捻工序中需要控制的关键质量指标。在实际生产中，不同锭子加捻会因锭速差异导致丝线间捻度不匀;在同一筒丝的不同区段会因单锭锭速波动导致丝线内捻度不匀[1-2]。捻度会影响丝束间的紧密程度，进而影响丝束吸收染料的速率和能力，捻度差异过大容易引起染色差异，影响真丝织物染色质量，对多股丝线的影响作用更为明显[3]。另外捻度差异大的丝线混织时，会因捻度不同造成定型回复差异而产生织物表面的不匀[4]。传统的捻度及其不匀率控制通常采用事后抽樣检验的质量管理方法，存在质量控制滞后的弊端。……