织机剑杆运动规律的设计

本文提出了一种带有等速运动的改进梯形加速运动规律,用于凸轮传动的剑杆运动。该运动规律可满足剑杆进、出梭口的时间以及进剑运动时间长短不等于退剑运动时间长短的要求。同时该运动规律可降低剑杆的最大加速度,并使跃度连续无突变,克服跃度为无穷大的现象。     

剑杆的弹性振动

剑杆引纬,由于剑杆加速度峰值达几十个 g,不可避免地引起剑杆弹性振动。当剑尾以名义加速度(?)(t)运动时,剑杆纵向振动方程为:ρA[((?)~2u)/((?)t~2)+(?)(t)]=(?)/(?)x(EA((?)u)/((?)x))在现有设计及应用中,(?)(t)均满足展成收敛的傅氏级数条件。从而可应用谐波分析法研究剑杆强迫振动的解。本文假设剑杆为等截面直杆,按梯形加速度规律计算剑杆纵向振动对位移的影响,并给出杆内动态正应力的计算式,为剑杆的强度设计提供了理论依据。     

LT102型剑杆织机传剑机构

LT102型剑杆织机是引进国外技术并在国内批量生产的廉价柔性剑杆织机。本文介绍了该机的特点;分析计算了剑头的位移、速度、加速度,并使用高速摄影机拍摄剑头运动,借助高速摄影胶片判读数据处理系统,得出剑头的位移、速度、加速度曲线,最后论述了剑带惯性拉直时期的定义及其重要意义,曲柄滑块机构的连杆时曲柄比值给予剑头运动的影响等重大问题。本文时剑杆织机的设计和分析具有普遍的参考价值。     

动态综合时剑杆运动规律的选择

本文对动态综合时剑杆运动规律的选择问题作了讨论。分析了剑杆动态位移的三阶导数和四阶导数对引剑机构名义运动的不利影响,并提出了减小这种影响的措施;对现有的几种剑杆动态运动规律的加速度峰值以及位移对时间的三阶导数和四阶导数进行了比较。最后,本文提出了一种以五次多项式为过渡段的修正梯形加速度规律,该规律保证了剑杆动态位移的三阶导数和四阶导数不发生突变。     

单片机控制的剑杆织机选色装置

本文介绍1511—56＂简易剑杆织机上使用的单片机选色送纬控制装置,该装置可与织机同步运行。既可选用预先设定好的织物花型,也可现场输入设计的织物花型。有数字显示功能,硬件结构简单,性能可靠,操作方便。     

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.     

CONJUGATE CAM WITH FIVE-BAR LINKAGE MECHANISM FOR RAPIER DRIVE OF FLEXIBLE RAPIER LOOMS

A new type of rapier drive for flexible rapier loom through conjugate cams with five-bar linkage mechanism is raised and analyzed. Two designs suitable for the conversion of 1515-190.5 shuttle looms are given as examples. This mechanism can be applied to traditional shuttle looms as well as to new flexible rapier loom design.     

多层传动带芯剑杆织机的系列设计

多层和阔幅是当前输送带整体带芯的发展方向,它不仅适用于煤矿,也适用于工矿、港口等处。本组近年来设计制造了生产这类产品的剑杆织机,分两个系列,将就其打纬、引剑、送径、开口几个方面作系列介绍。本文着重对打纬、引剑机构设计作介绍,它对设计这类织机有普遍意义。     

电子式多臂纹板冲孔机的研究

介绍了用于织机多臂纹板和剑料选色纹板的电子式纹板冲孔机的原理以及我们在国产化研究中遇到的硬件、软件、电磁铁和操纵部分的设计问题．     

对尼龙剑带磨损失效的分析

在挠性剑杆织机中,尼龙剑带易磨损、使用寿命短是一个突出的问题。本文详尽地分析了尼龙剑带和传剑轮的啮合过程,找出了尼龙剑带不耐磨的主要原因,进而提出了提高剑带耐磨性和增加使用寿命的有效方法。     

Review and Prospect of the Shuttleless Loom Development

In this paper, a review of the shuttleless looms' development shows that three types of shuttleless looms: rapier, Jet and gripper projectile, are now equally matchable with each other. A prospect of the shuttleless loom's development is also dealt with. It can be predicted that both rapier and Jet looms will be developed further and the future development of a new type of modern weaving looms will be prosperous in the coming 21st century.     

双相剑杆织机开口、打纬、引剑运动配合的分析研究

针对双相剑杆织机特点,在考虑单台织机运动配合的基础上,同时考虑左、右手二台织机的协调性,对其开口、打纬、引剑运动的协调配合进行了分析研究,并由此确定了有关参数,得以保证双相剑杆织机的正常运行。     

传剑系统动态分析

针对剑杆织机剑带、剑头、传剑轮的结构特点,建立了传剑系统三维有限元分析模型.采用有限元分析方法,对传剑系统进行了动态分析.目的在于求出传剑系统的固有频率及各阶固有振型,为现有设计及发展新的传剑系统结构设计提供参考.     

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。     

剑杆引纬连杆机构的创新分析与设计研究

通过对典型剑杆织机传剑机构的运动弹性动力学研究,概括地提出了较理想引纬传动方案所应具备的主要性能特点,由此可创新设计出一种具有复合运动的全转动副空间连杆引纬机构.     

剑杆织机打纬引纬系统的动平衡研究

本文重点进行了剑杆织机牵连式打纬引纬系统的动平衡研究.文中计算了1511普及型剑杆织机的六杆打纬引纬系统的惯性力和惯性力矩,并用最小二乘法对其进行动平衡计算.计算结果表明:平衡后系统的惯性力下降10%,惯性力矩没有增加,效果良好。     

剑杆织机平带凸轮设计计算法

作者申请的专利提出了用平带凸轮来传送剑杆(或剑带)往复运动,比积极式刚性共轭凸轮的制造要求较低,无磨损问题,且运转平稳无噪音,机械结构十分简单,适宜于改造有梭织机为简易式剑杆织机,便于推广。可是这种凸轮的设计计算方法,未见国内外文献有详细报导。本文通过理论推导,初步介绍了应如何根据给定的运动规律要求来进行这种平带凸轮设计计算的具体方法,包括作图法和解析法。这不仅适用于织机剑杆或剑带的传动,也可适用于其它机械往复运动的传动上,有一定的普遍意义,可以推广其应用范围。     

Analysis of a Combined Mechanism in Improving Weaving Reed Space with Rapier Looms

The analysis of improved system of the steel tape rapier loom is introducted. It shows the usefulness of a combined mechanism in this reformation. When the whole weaving machine is only changed a little, through the combined mechanism, the improved weaving machine can weave the fabrics with wider reed space. The combined mechanism of rapier drive system with a crank lever , which is driven by a differential gear train that is to meet the need of reed space widening, has its own key factor in this design. It is the eccentric distance "e" . Increasing the value of "e" is very helpful to increase the reed space of the looms.     

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.     

关于有梭织机改造成剑杆织机的问题

提出了当前我国从有梭织机改造成的、大量生产的剑杆织机有待进一步改造的问题。提出了适当缩短筘座脚以及钢筘的摆幅的必要性及可能性,并介绍了这种进一步改造方案的具体设计方法,敌对此类剑杆织机的改造具有普遍的指导意义。