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。     

基于UG的盘形凸轮参数化设计

文章探讨了基于UG的凸轮参数化建模技术,应用表达式工具和规律曲线功能,成功地实现了盘形凸轮的参数化建模,为凸轮机构的运动动力分析等提供了精确的实体模型。     

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.     

基于VB凸轮机构的AutoCAD三维运动仿真

介绍了基于Visual Basic对AutoCAD进行二次开发的理论依据,并就二次开发的关键技术进行研究.以此为基础,详细阐述了通过Visual Basic开发并结合AutoCAD,对已设计出的凸轮机构可以实时实现生成三维实体及运动仿真,提高了凸轮机构设计的效率,实现了系统的智能性.     

An Optimization Design of a Weft Insertion Mechanism for Rapier Looms

By analyzing a combined and spatial 6-bar linkage weft insertion mechanism, its practical model for optimization design is set up and the modification of penalty strategy is put forward so that the genetic algorithm can be better used in optimization design for mechanisms with non-linear constraints. The design result is discussed.     

基于LabVIEW和Matlab的共轭凸轮打纬机构分析与设计

研究采用LabVIEW和Matlab混合编程来实现打纬共轭凸轮设计的方法,推导共轭凸轮理论廓线和实际廓线的计算公式,开发具有运动仿真功能的共轭凸轮辅助设计软件,方便共轭凸轮的设计与加工制造.     

Kinematic Modeling and Characteristic Analysis of Eccentric Conjugate Non- circular Gear ＆ Crank-Rocker ＆ Gears Train Weft Insertion Mechanism

A novel weft insertion mechanism named eccentric conjugate non-circular gear & crank-rocker & gears train weft insertion mechanism was proposed in order to better meet the requirements of rapier loom’s weft insertion mechanism as well as reduce the manufacturing difficulty. Meanwhile, based on the working principle of this mechanism, kinematical mathematic models of this mechanism were established and an aided analysis and simulation software was compiled. The influences of eccentricity ratio, deformation coefficient, and other important parameters on the kinematics characteristics of this mechanism were analyzed by using the software. A group of preferable parameters which could meet the requirements of weft insertion technology were obtained by means of human-computer interactive optimization method. The maximum velocity, maximum acceleration, and variation of acceleration of this mechanism are smaller than those of the conjugate cam weft insertion mechanism applied on TT96 rapier loom under the conditions of the same unilateral total stroke of rapier head and the same rotary speed of loom spindle; meanwhile the other demands of weaving technology can be met by this novel weft insertion mechanism.     

基于UGNX的渐开线蜗轮参数化设计

研究了在UGNX环境下实现渐开线蜗轮的参数化设计方法,利用表达式功能构建渐开线、螺旋线和蜗轮毛坯截面线,并利用这些曲线完成了蜗轮的实体设计。     

一种共轭凸轮的组合型高级运动规律

介绍一种新颖的共轭凸轮设计方法,以机构的运动特性指标为研究对象,按照特殊工艺要求的边界条件拼接组合8次多项式凸轮曲线.针对高速剑杆织机的空间引纬机构,应用组合法与有限差分法对多项式加速度曲线进行修整,设计引纬共轭凸轮机构,运用Pro/E建立三维模型虚拟样机,并在ADAMS(Automatic Dynamic Analysis of Mechanic System)环境下进行运动学仿真与分析.仿真结果显示,该方法设计的共轭凸轮机构能够满足高速引纬的工艺要求,具有更好的运动特性指标.此共轭凸轮机构传动稳定可靠,运动准确,运动规律在整周期内均属积极性质,无刚性、柔性冲击,可达到最理想的工艺效果.     

Analysis and Design of Conjugate Cam Shedding Mechanism with Dual Driving Shafts

The principle of conjugate cam shedding mechanism forthe outside tappets with dual driving shafts is discussed,and its design conditions and parameters are studied,giving the results of practical calculations finally.     

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.     

基于VB.NET的WEB数据库应用

以网络实验信息管理系统为研究背景,应用VB.NET将数据库信息发布到Internet上,很好地实现了WEB数据库建立、绑定、查询、编辑等操作,功能齐全,便于扩展。     

基于Solid Edge和VB对直齿圆柱齿轮进行参数化设计

利用VB6．0编程语言工具，对三维CAD软件Solid Edge开发，实现了对直齿圆柱齿轮的参数化设计，主要生成了系统界面模块、齿形计算模块和齿轮生成模块，可依照用户输入的不同的齿轮参数，得到尺寸不同的齿轮三维实体和相应的变量表．     

GA74型剑杆织机改造中引纬机构的优化设计

GA74型剑杆织机由于其筘座脚长和钢筘摆幅大,故其速度不能有效地提高,这里给出了改造后的引纬机构,并用优化设计的方法,在满足织机的工艺条件和运动性能等约束条件的基础上,获得了设计方案的一组较理想的参数.     

Simulation and Analysis of Spatial Weft Insertion Mechanism Considering Flexibility and Clearance

A 3D model of the spatial four-bar weft insertion mechanism was built with unigraphics NX(UG) according to the actual requirement,and dynamics simulation was carried out by importing the model into ADAMS.Without considering the clearance,the motion characteristic curve of the sword belt was generated through ADAMS combined with MATLAB.In this paper the hinge between the rod and the sector gear was selected as an example with different values of clearance,outputting the motion characteristic curve of the sword belt.Finite element analysis(FEA)was conducted,the flexible body was generated by importing the forked frame into ANSYS,and flexible dynamics simulation was carried out by importing the flexible body into ADAMS to replace the rigid rod.A comprehensive comparison of the output characteristics of the sword belt was conducted in the consideration of the clearance or flexible.Analysis of the force on the left hinge of the rod was carried out with the ADAMS post processing module.With the same clearance,considering the flexibility,amplitude of fluctuation of the force on the hinge increased obviously.     

在VB.NET中使用设计模式

作为一种新一代的面向对象程序设计语言,VB.NET在编写代码时,常常采用设计模式以增强程序的可读性、可扩展性和可重用性。本文结合一个简单的例子,使用VB.NET,实现了一种改进的工厂模式,并简单总结了VB.NET使用设计模式的优缺点和潜在的问题。     

圆柱凸轮机构的参数化造型和运动仿真

在Pro／E中,通过Relation和Graph特征来控制截面形状从而生成精确的圆柱凸轮模型。通过定义旋转运动和直线运动的共同作用,模拟出滚轮在圆柱凸轮上的运动过程。     

基于VB.NET的.NETFramework应用程序的部署

主要介绍了基于VB.NET的.NETFramework简单应用程序和组件化应用程序,以及利用指定私有程序集路径的方法和共享组件的方法进行应用程序的部署.     

基于Pro/E参数化建模技术的凸轮轮廓线精确设计

凸轮机构实现推杆预期的运动规律要依赖于凸轮轮廓曲线,凸轮机构设计的主要任务是凸轮轮廓曲线的精确设计．利用Pro／E软件方便快捷地设计平面凸轮和三维凸轮轮廓曲线．并通过运动仿真的分析结果说明设计的凸轮机构能够满足预期的要求．     

基于UG图形模板的渐开线花键轴滚轧轮参数化设计

运用UG软件对渐开线花键轴滚轧轮进行参数化建模,通过花键轴的参数确定滚轧轮基本参数,将花键轴参数与滚轧轮三维模型关联起来。通过修改花键轴的键数、模数、压力角等参数,建立所需滚轧轮的三维模型,大大提高了设计效率以及设计思路的可重用性。