多头电脑刺绣机超静定梁机架的设计  

Design of multi-head computer embroidery machines with a statically indeterminate beam

作　　者：宣海枫 张蓉蓉 林锋 吕榕 李剑敏[4] 袁严浩翰 XUAN Haifeng;ZHANG Rongrong;LIN Feng;L Rong;LI Jianmin;YUAN-YAN Haohan(Automatic Equipment Department,Hangzhou Honghua Digital Technology Stock Co.,Ltd.,Hangzhou 310000,China;Quality Appraisal Department,Zhejiang Testing&Inspection Institute for Mechanical and Electrical Products Quality Co.,Ltd.,Hangzhou 310000,China;Zhejiang Zhengda Mold Co.,Ltd.,Lishui 321400,China;Zhejiang Sci-Tech University's Key Laboratory of Reliability Technology for Mechanical and Electronic Product,Hangzhou 310000,China)

机构地区：[1]杭州宏华数码科技股份有限公司自动装备部,杭州310000 [2]浙江省机电产品质量检测所有限公司质量鉴定部,杭州310000 [3]浙江正达模具有限公司,浙江丽水321400 [4]浙江理工大学浙江省机电产品可靠性重点实验室,杭州310000

出　　处：《现代纺织技术》2024年第6期70-79,共10页Advanced Textile Technology

摘　　要：多头刺绣机机架为大跨距横梁结构,机头为偏心凸轮机构,在高速工况下常激发出强烈振动,影响刺绣产品的质量和产量。为了解决多头刺绣机横梁的振动问题,通过多体动力学分析和有限元分析,提出了多头电脑刺绣机超静定横梁机架的概念。通过机头两侧配置半圆柱形平衡块,降低机头运行的惯性力,减小内部激励;采用超静定梁的设计理念,对横梁的约束进行加强,降低横梁的振幅,改善振动周期。与目前市场上多个机架减振方案对比,文章提出的超静定梁的振动幅值具有明显优势,横梁振动周期发生明显变化,摆脱了机头运行带来的周期性冲击影响,从而大幅度减少由于刺绣机机头高速运转而导致的大跨距横梁振动问题,有利于提高刺绣机高速运转下的工艺精度。Computer embroidery machines are the main member of the decorative sewing machine industry.They are widely used in the sewing of all kinds of decorative patterns,such as the production of clothing signs and decorative patterns,enjoying a very important position in the textile and garment industry.The multi-head embroidery machine frame features a large-span crossbeam structure,and its machine head incorporates an eccentric cam mechanism.Operating at high speeds,this setup frequently produces significant vibrations,thereby impacting the quality and production output of embroidered products.In response to the vibration challenges associated with the crossbeam in the multi-head embroidery machine,the concept of statically indeterminate crossbeam frame of multi-head computer embroidery machine was put forward through multi-body dynamic analysis and finite element analysis.By installing semi-cylindrical balance blocks on both sides of the machine head,the inertia force of the machine head's movement was reduced,and internal excitations were minimized.The design concept of a statically indeterminate beam was employed to strengthen the constraints on the crossbeam,reduce its amplitude and improve the vibration cycle.The vibration conditions of the crossbeam were analyzed and solved through a combination of ADAMS dynamic analysis and ANSYS transient dynamic analysis.For the force situation of the large-span embroidery machine crossbeam,theoretical calculation methods for maximum displacement and nodal vibration amplitude were employed and the consistency between finite element methods and theoretical calculation methods was verified.By utilizing ADAMS software,optimal design dimensions and installation angles for the balance block were obtained,significantly reducing the impact of the machine head movement on the crossbeam.The design concept of employing a statically indeterminate beam and the theoretical analysis results proposed in the design are applicable to various optimization scenarios with similar multiple loads

关 键 词：刺绣机 大跨距横梁 超静定梁 有限元 抑振 周期性负载 

分 类 号：TH113.1[机械工程—机械设计及理论]