纺织学报 ›› 2021, Vol. 42 ›› Issue (04): 162-169.doi: 10.13475/j.fzxb.20200705308

• 机械与器材 • 上一篇    下一篇

针织纬编氨纶输送控制技术

彭来湖1, 罗昌1, 牛冲2(), 吕永法3, 胡旭东1, 戴宁1   

  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.杭州旭仁自动化有限公司, 浙江 杭州 310018
    3.浙江日发纺机技术有限公司, 浙江 新昌 312500
  • 收稿日期:2020-07-21 修回日期:2020-12-11 出版日期:2021-04-15 发布日期:2021-04-20
  • 通讯作者: 牛冲
  • 作者简介:彭来湖(1980—),男,副教授,博士。主要研究方向为针织装备技术。
  • 基金资助:
    浙江省重点研发计划项目(2019C01038);浙江省博士后科研项目特别资助项目(ZJ2020004)

Control technology for spandex yarn delivery in weft knitting

PENG Laihu1, LUO Chang1, NIU Chong2(), LÜ Yongfa3, HU Xudong1, DAI Ning1   

  1. 1. Key Laboratory of Modern Textile Machinery & Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. Hangzhou Xuren Automation Co., Ltd., Hangzhou, Zhejiang 310018, China
    3. Zhejiang Rifa Textile Machinery Technology Co., Ltd., Xinchang, Zhejiang 312500, China
  • Received:2020-07-21 Revised:2020-12-11 Online:2021-04-15 Published:2021-04-20
  • Contact: NIU Chong

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摘要：

为解决低模量、高弹性、高回复率特性的氨纶在编织生产过程中送纱量难以调节控制的问题,采用快速响应的积极式送纱器作为动态输送纱线的驱动器,以可调占空比的脉冲宽度调制脉冲实现模拟量控制信号输出,以高性能高级精简指令集机制处理器为控制核心,采用位置和速度双闭环方式设计氨纶送纱实时控制器,实现氨纶的输送量动态调节和恒张力输送。研究了氨纶输送的工艺要求,阐述了送纱控制器的硬件设计和软件开发,提出了送纱控制器与整机控制系统的同步方案。实验结果表明,采用该控制方案的纬编织物成圈均匀整齐,无横条暗纹,弹性良好,验证了氨纶送纱量控制方案的可行性。

关键词: 积极式送纱, 恒张力, 氨纶纱, 纬编, 送纱量控制技术

Abstract:

The amount of spandex yarn delivery is difficult to adjust and control in weft knitting process because of its low modulus, high elasticity and high recovery rate. The fast response positive yarn feeder was used as the drive for yarn delivery. Analog control signal output was achieved using the pulse width modulation (PWM) with adjustable duty cycle. The high performance advanced RISC machines (ARM) processor was used as the control core, and the position and speed double closed loop mode was adopted. The real-time controller of the spandex yarn was designed to achieve the dynamic adjustment and constant tension delivery. The process requirements of spandex delivery were studied, and hardware design and software development of the yarn feeding controller were addressed. The synchronization scheme between the yarn dilivery controller and the whole machine control system was made. The experimental results show that the weft knitted fabrics produced with the new control scheme is even and tidy in circle, without dark stripes and with good elasticity, which verifies the feasibility of the spandex delivery control scheme.

Key words: positive yarn feeding, constant tension, spandex yarn, weft knitting, yarn dilivery control technology

中图分类号: 

  • TS103.7

图1

氨纶纱线输送过程 1—纱架; 2—电子眼; 3—氨纶输纱器; 4—导纱孔;5—纱嘴; 6—针筒; 7——氨纶纱线。"

图2

氨纶送纱控制技术方案"

图3

针筒和输纱器驱动辊示意图"

图4

氨纶纱线应力-应变曲线"

图5

系统硬件电路整体框架图"

图6

机器针筒编码及零位信号检测示意图"

图7

编码零位脉冲采集电路"

图8

PWM调压输出模拟量控制信号"

图9

人机驱动交互示意图"

图10

氨纶送纱调节流程图"

图11

氨纶纱线输送渐变调节流程"

图12

PWM调压输出前后端波形图"

图13

织物线圈参数测量图"

表1

织物试样线圈参数的测量数据"

试样编号 圈距/μm 圈高/μm 标准差/μm
1 388.36 516.04 5.01
2 385.89 523.28 4.23
3 388.31 516.07 3.81
4 385.83 513.63 5.22
5 381.01 528.11 3.25
6 388.31 525.69 5.49
7 390.65 522.45 6.02
8 393.06 511.49 4.91
9 381.00 523.76 3.89
10 388.33 519.28 5.11
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