针织立体构型产品的全成形工艺设计  

Full forming process design for three-dimensional knitted products

作　　者：李玉贤 丛洪莲 吴光军 LI Yuxian;CONG Honglian;WU Guangjun(Engineering Research Center for Knitting Technology,Ministry of Education,Jiangnan University,Wuxi,Jiangsu 214122,China)

机构地区：[1]江南大学针织技术教育部工程研究中心,江苏无锡214122

出　　处：《纺织学报》2023年第5期132-138,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(61772238);泰山产业领军人才项目(20180224)。

摘　　要：为探讨针织立体构型产品在全成形电脑横机上的成形编织方式以实现一次成形编织,研究了针织立体构型产品的成形工艺和计算方法,根据外观轮廓的不同,将其进行分类,并在产品立体构型转化为二维纸样的基础上,对筒状结构、立方体结构和球状结构进行工艺建模,解析其成形工艺和算法。结果表明:在三维结构到二维纸样再到全成形纸样的转换过程中,利用三角换算法可形成筒状构型的直线轮廓,利用平行四边形转换法可实现立方体构型的三维结构,利用逆拟合法可形成球状构型的弧形轮廓。通过弧形灯罩的实例验证,最终能得到符合要求的全成形产品。Objective From the manufacturing of single component to one-piece products,the full forming computerized flat knitting machines are now capable of rapidly producing knitted products.However,the structure of knitted three-dimensional products is complex,and the forming process needs to be further improved.On the basis of the existing process design methods,the full forming process design of knitted three-dimensional products with more complex structure was carried out,and the process algorithm in the forming process was discussed,so as to facilitate the full formation of three-dimensional knitted fabrics.Method According to different appearance contours,three-dimensional knitted products was classified and the cylindrical structure,cubic structure and spherical structure were analyzed based on the full forming process,before selecting truncated cone,frustum of a pyramid and sphere with general characteristics for algorithm model construction.After transforming into the full forming paper pattern,the mathematical relationship between the number of knitting rows,the number of narrowing and widening needles and the inclination angle was explored.Finally,the curved lamp shade was knitted on the four-needle-bed flat knitting machine to verify the feasibility.Results From the perspective of appearance and contour modeling,knitted three-dimensional products can be divided into cylinder structure,cubic structure,spherical structure and special-shaped structure,which were utilized to produce clothing,bags,lighting,seats and other categories of knitted products.The truncated cone obtained a full forming paper pattern by cutting and expanding,and a trigonometric function relationship was formed between the number of knitting rows,the number of narrowing and widening needles and the inclination angle,and hence the trigonometric transformation method was proposed.The side shape of the truncated cone was achieved by entering the number of knitting rows and the number of narrowing and widening needles(Fig.6).The frustum of a pyr

关 键 词：立体构型 针织全成形编织 工艺建模 纸样转换 电脑横机 二维纸样 

分 类 号：TS184.5[轻工技术与工程—纺织材料与纺织品设计]