Sulzer 片梭织机送经和卷取机构分析

介绍了Ｓｕｌｚｅｒ片梭织机送经和卷取机构的结构,分析了送经和卷取的纬密范围,对消化与使用引进设备有一定的指导意义。     

嵌入式毛巾织机送经卷取和起毛集成控制器的设计

设计了基于ARM(advanced RISC machines)微控制器的送经卷取和起毛集成控制器.采用μC/OS-Ⅲ嵌入式实时操作系统,基于CANopen从站协议,控制器通过CAN总线和主控制系统进行实时通信.开发了基于RBF(radial basis function)神经网络整定的PID(proportion integration differentiation)张力控制算法,完成了天经轴、地经轴、卷取辊和起毛凸轮4个伺服电机的实时同步控制.调试运行结果表明,该送经卷取和起毛集成控制器可解决当前国内毛巾织机存在的纬密和张力控制不均等问题,满足了毛巾织机的高速化、数字化和智能化等发展要求.     

新型织机控制系统

由我校研制成功的新型织机控制系统是由一台工控机作为中央控制计算机、外围配制了模块化的各类I/O接口板卡组成的一个功能完备的满足织机织造要求的计算机控制系统,系统软件平台为DOS6.22.通过对I/O的配置和选择,可组成剑杆织机和喷气织机的控制系统.系统配备电子多臂机,控制棕框片数最大为20片,对花色品种有很大的适应性.该系统采用连续积极式电子送经和电子卷取机构,保证了纬密和送经量的稳定,从而保证了布面质量.系统采用类Windows风格的操作界面设计,极大地方便了操作者,并提供了菜单弹出式的提示信息,使操作者能及时了解织机的运行状况,方便了对织机的维修和操作. 控制系统技术指标如下: 剑杆织机:车速最高550 r/min,入纬率1 050 m/min,最大纬色数8色,控制经纱张力在设定值的±5 kg,纬密调节范围5～200纬/cm. 喷气织机:车速最高800 r/min,入纬率1 680 m/min,最大纬色数4色,控制经纱张力在设定值在±5 kg,纬密调节范围5～200纬/cm.     

多棘爪式织物卷取机构的设计

多棘爪式卷取机构能近似无级地调节织物的纬密,调节方便,且可节约大量变换齿轮.本文对该机构的纬密计算,棘爪数、棘轮齿数以及传动连轩长度的确定等设计方法均作了较为详细的介绍。     

织机电子送经和卷取控制系统的研制

研制了一种用步进电机驱动的同步电子送经和卷取控制系统。该控制系统在织造时使经纱保持张力稳定，并通过强大的控制程序来消除停车稀密路，该控制系统不但可以实现均匀卷取，还能织造变纬密织物，可用于特殊织物的开发。     

减少GA749型剑杆织机"开车横档"的技术分析与探讨

从理论上分析了GA749型剑杆织机开车横档形成的原因．根据GA749型剑杆织机的特性，从调整送经卷取机构、确定较为合理的工艺参数、降低断头率、加强空调管理等方面探讨了减少GA749型剑杆织机开车横档的措施，取得了显的效果．     

对《机织工艺与设备》教材中部分论点的不同看法

对１９８２年２月出版的高等纺织院校机织专业统编教材《机织工艺与设备》中部分论点提出了不同的看法．该书在分析筒子两端卷取速度变化的情况时，槽筒直径用８２．６ｍｍ；但在分析筒子高度小于导纱器动程的差值时，以槽筒直径为７６．６ｍｍ进行计算．采用不同的数值计算结果前后不符．按照书中的理论与其中有关表的数据，小麦淀粉粘度最大值应处于温度６５～８７℃之间，８７℃开始粘度已由最大值逐渐下降并向稳定状态过渡；而在小麦淀粉装温度、粘度变化曲线图中，小麦淀粉装的粘度急剧上升是在９０℃以后，粘度最大值也在９０℃以后．即表中数据和图中数据不一致，相互矛盾．该书以纬密为１５７根／１０ｃｍ、下机缩率为３％的帆布为例介绍用查表法求纬密齿轮．书中先把机下纬密１５７根／１０ｃｍ按收缩率３％换算成机上纬密１５２．２９根／１０ｃｍ，查１９７７年出版的《棉织手册》求得变换齿轮，验算时机下纬密为１５２．２９根／１０ｃｍ．即要求机下纬密为１５７根／１０ｃｍ的帆布，选择好纬密齿轮后织出的织物纬密却变为１５２．２９根／１０ｃｍ，原因是手册中该表已考虑了下机缩率．     

打纬及开关车织物横档疵点

以实验的方法解释了织机在未采用张力补偿措施前提下,产生开关车织物横档疵点的原因。织机开关车时由于主轴转速、钢筘打纬速度达不到正常数值,使经纱张力及钢筘打纬力达不到一定的正常数值,以致打纬过程中经纬纱线相对滑移量比织机正常运转时的数值小、共同移动量比正常运转时的数值大,所形成的织物达不到正常的纬密,在织物上产生横档疵点。同时,也指出了长期以来对织物横档疵点成因一种肤浅的解释。     

片梭织造工艺的设计(摘要)

随着纺织工业新技术的发展和相关高新技术的不断引进,纺织厂使用无梭织机将越来越多,其中片梭织机具有引纬可靠性佳,品种适应性强,产品品质优,原料、备件、能源消耗低的优点,但片梭织机所需一次性投资费用高,因此用好片梭织机、充分发挥效率、加速资金回收是极为关键的。工艺设计时,由于片梭织机采用摆动式后梁和摩擦联轴器型式的自动送经装置和送纬系统,片梭织造经纱从织轴满轴到空轴经纱张力比有梭稳定,纬纱采用储纬器,使纬纱张力大且稳定,加上片梭织机采用“小开口,大张力”的工艺,总织缩率比有梭小,因此片梭织造在箱号设计中,同品种织物的箱号要适当加密。织轴轴辐的选择也要考虑梭导片的插人需要,尽量使经纱与梭导片平行,以利于减少经纱的断头。纬密牙选择时,对高密织物,由于织口动态不稳定影响,在采用手册理论计算时,也应考虑实际织口的游动,以防纬密过高,影响经济效益。     

碳纤维角联织机卷取系统张力网络化控制研究

针对碳纤维角联织机卷取系统中的张力控制问题,对卷取系统进行动力学分析并建立动力学模型;在考虑网络诱导时延、数据包丢失及网络带宽占有率等因素的基础上设计一种自适应模糊PID控制器,将此控制方法与常规的PID控制方法进行仿真对比。结果表明,在同时存在网络诱导时延、数据包丢失及网络带宽占有率的情况下,自适应模糊PID控制方法超调量小、输出张力波动小、跟踪效果良好、系统稳定性强,具有更好的控制效果。     

Design of Electronic Weft-Insertion System for Three-Dimensional Loom

The motion laws for rapier weft insertion mechanism are analyzed. According to the special requirements on rapier loom's weft-insertion system for weaving three-dimensional( 3-D) fabric,a new rapier electronic weft-insertion system is presented. The design principle for 3-D loom's weft insertion system is introduced,including the design of the motion law of electronic weft-insertion system,the driving system's hardware configure,and its software's controlling principle. The weft insertion system is computer-controlled and servocylinder driven so as to control the rapier's movement to insert the weft into the multi-shed while 3-D weaving. This method greatly simplifies the weft-insertion system,achieves weft-insertion with variable travel,and improves the flexibility and reliability. The weft insertion system has been applied in a 3-D loom successfully.     

剑杆织机打纬引纬系统结构尺寸误差对打纬和引纬运动的影响

本文用矩阵法分析了剑杆织机系统结构尺寸误差对打纬和剑头引纬运动的影响,建立了打纬和剑头运动两者的误差与系统各结构参数误差之间关系的矩阵方程。以1511普及型剑杆织机为实例进行了分析计算,得到了较满意的结果。本文所述及的方法具有一般性。     

Automatic Formation Techniques of Woven Conical Vascular Graft

Conical vascular tubes are of strong demand owing to their formed shape and excellent characters to mimic human blood vessels. In this study,the automatic shuttle loom and computer aided design( CAD) system were customized to prepare a conical vascular graft. Meanwhile, the weaving principle of a conical vascular graft was identified in terms of the lift-drop front rest,and the geometrical relations were established among the cloth fell,front rest and back rest. Also,the change of weft density from the liftdrop motion of the front rest was analyzed,and a strategy was established to compensate the offset of weft density by changing the taken-up length. Afterwards,the proposed weaving principles were demonstrated by weaving a conical vascular graft on the customized shuttle loom.     

Evenness Control of Rapier Loom Tension by Using Neural Network

The neural network model （NNM） is used to control the evenness of rapier loom tension and to model the uncertain parameters of drafting process. This model can estimate recursively the tension and incorporate predictive control strategies. After controlling the effect testing, it can be seen that the behavior is excellent following different set point and variations, such as the diameter of the beam of weaver, air stream, density of warp and weft, type of textile, etc. An optimum steady state scheme has been fixed in keeping evenness of tension of loom. This method improves obviously the efficiency and quality of production.     

ZA型喷气织机喷气引纬控制系统的改进

阐述了ZA型喷气织机喷气引纬控制系统的主要设计原理及其特性，并对该引纬控制系统及气源、喷嘴、调压阀和储气罐等主要部件的结构特点和参数进行了改进．改进后该系统降低了操作工的劳动强度，减少了织疵，提高了织物质量，实现了高速、宽幅、多色、优质生产．     

打纬共轭凸轮机构的设计

提出一种适合打纬共轭凸轮机构的新型运动规律,建立的纬共轭凸轮廓线的坐标方程。利用三角函数运动规律的组合和主、回凸轮廓线的共轭特性,探讨打纬共轭凸轮机构的设计。推导出适合打纬共轭凸轮机构的双简谐运动规律的共轭凸轮廓线的坐标方程。研究表明,双简诸运动规律可用于设计打纬共轭凸轮机构,为设计高速织机凸轮机构奠定了理论基础。     

织机电子送经与电子卷取运动的同步控制

采用主，从单片机控制织机的电子送取运动，通过主单片机输入和修改织机有关参数，该方案具有自动化程度高，织机同步性能好的优点。     

Reverse Design and Test of Non-circular Gear ＆ Crank-Rocker ＆ Gear Trains Weft Insertion Mechanism

For the purpose of obtaining satisfactory performance of the non-circular gear & crank-rocker & gear trains (NCCRG) weft insertion mechanism which was proposed in this paper,the ideal kinematic curve of this weft insertion mechanism was given,and the reverse solution models of this mechanism were established.A reverse design and simulation software was compiled based on Visual Basic 6.0 to obtain the mechanism parameters,including the pitch curves and tooth profiles of the non-circular gears.A test-bed of this mechanism was developed according to these parameters.The kinematic performance of this weft insertion mechanism was tested by high-speed video tape recorder with its corresponding video analytical software Blaster's MAS.And the test results were identical with the theoretical calculation.Compared with the conjugate cam weft insertion mechanism which is applied on TT96 rapier loom,under the condition of same weft insertion rate,the variation of acceleration of this mechanism is smaller.This novel weft insertion mechanism can meet the requirements of weft insertion on rapier looms with smooth and steady motion.     

电脑绣花机针杆,挑线机构的分析

本文以深圳华怡电脑机械有限公司生产的富怡牌电脑绣花机为例,详细分析其针杆,挑线机构的结构,运动规律,面线消耗量的平衡及运动时间的配合。