纺织学报 ›› 2021, Vol. 42 ›› Issue (02): 193-20.doi: 10.13475/j.fzxb.20200803708

• 机械与器材 • 上一篇    

基于轴向运动悬臂梁理论的无缝内衣机织针横向振动特性

戴宁1,2, 彭来湖1(), 胡旭东1, 钟垚森1, 戚栋明2   

  1. 1.浙江理工大学 浙江省现代纺织装备技术重点实验室, 浙江 杭州 310018
    2.浙江理工大学 纺织科学与工程学院(国际丝绸学院), 浙江 杭州 310018
  • 收稿日期:2020-08-07 修回日期:2020-11-04 出版日期:2021-02-15 发布日期:2021-02-23
  • 通讯作者: 彭来湖
  • 作者简介:戴宁(1991—),男,博士生。主要研究方向为针织装备控制技术。
  • 基金资助:
    国家重点研发计划资助项目(2017YFB1304000)

Transverse vibration characteristics of knitting needles in seamless underwear machines based on axial movement cantilever beam theory

DAI Ning1,2, PENG Laihu1(), HU Xudong1, ZHONG Yaosen1, QI Dongming2   

  1. 1. Key Laboratory of Modern Textile Machinery & Technology of Zhejiang Province, Zhejiang Sci-Tech University,Hangzhou, Zhejiang 310018, China
    2. College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2020-08-07 Revised:2020-11-04 Online:2021-02-15 Published:2021-02-23
  • Contact: PENG Laihu

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摘要：

无缝内衣机织针轴向运动过程中的横向振动特性与编织机构性能密切相关,为解决织针轴向运动过程中横向振动的理论及仿真模型少、编织过程织针横向振动数据难测量等问题,通过将编织织针等效为轴向运动悬臂梁对其横向振动特性进行理论研究,并采用ANSYS仿真软件进行有限元计算,最后通过高速相机对编织织针的横向振动特性进行测试。实验结果显示:理论及仿真计算所得横向振动曲线及动态频率值一致,动态频率值最大偏差不超过3.84%;织针编织过程中存在横向振动,且所得频率值与理论及仿真计算结果一致,证明了理论及仿真建模的正确性。

关键词: 无缝内衣机, 织针, 轴向运动悬臂梁, 横向振动, ANSYS仿真软件, 高速相机

Abstract:

During the axial movement of the knitting needle in seamless underwear machines, the transverse vibration characteristics of the knitting needle are closely related to the performance of the knitting mechanism. However, there are few studies on the transverse vibration of knitting needles at this stage during the knitting process, hindering the improvement of stability of the seamless underwear machine in terms of vibration. In this paper, the vibration characteristics were theoretically studied with the knitting needle as an equivalence to an axially moving cantilever beam and the finite element calculation was carried out using ANSYS simulation software. The transverse vibration characteristics of the knitting needles were examined using a high-speed camera. The transverse vibration curve and dynamic frequency value calculated theoretically and by simulation demonstrates high level of resemblance with each other for the transverse vibration curve, and the maximum deviation of the dynamic frequency value is below 3.84%, The experimental results prove the existence of transverse vibration during the knitting process, and the frequency value obtained is consistent with the theoretical and simulation results, which implies the correctness of the theoretical and simulation modeling.

Key words: seamless underwear machine, knitting needle, axial movement cantilever beam, transverse vibration, ANSYS simulation software, high-speed camera

中图分类号: 

  • TS103.7

图1

无缝内衣机编织机构三维实体模型"

图2

织针轴向运动悬臂梁模型示意图"

图3

织针沿三角上升时的横向振动曲线"

图4

织针沿三角下降时的横向振动曲线"

图5

ANSYS仿真流程图"

图6

载荷施加特性及效果图"

图7

织针沿三角上升时的横向振动仿真曲线"

图8

织针沿三角下降时的横向振动仿真曲线"

表1

织针上升过程中的横向振动频率规律"

波峰位置 理论值/Hz 仿真值/Hz 相对偏差/%
1 496 482 2.82
2 481 470 2.29
3 466 456 2.15
4 450 441 2.00
5 434 419 3.46
6 417 401 3.84
7 401 388 3.24
8 384 370 3.65

表2

织针下降过程中横向振动频率规律"

波峰位置 理论值/Hz 仿真值/Hz 相对偏差/%
1 380 370 2.63
2 388 382 1.55
3 402 390 2.99
4 414 402 2.90
5 425 413 2.82
6 436 424 2.75
7 448 436 2.68
8 458 444 3.06
9 470 456 2.98
10 481 468 2.70
11 492 480 2.44
12 503 490 2.58

图9

测振平台和测振过程示意图"

图10

横向振动时域及频域特性"

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