基于AutoCAD的链传动计算机辅助设计系统

链传动是机械传动的重要组成部分 ,这里介绍了用 VB6.0作为工具开发基于 AutoCAD的链传动 CAD系统的方法.本系统实现了链传动设计与校核自动化,实现了链传动设计与绘图一体化,提高了设计的质量和效率.     

基于AutoCAD的链传动计算相辅助设计系统

链传动是机械传动的重要组成部分，这里介绍了用VB6．0作为工具开发基于AutoCAD的链传动CAD系统的方法。本系统实现了链传动设计与校核自动化，实现了链传动设计与绘图一体化，提高了设计的质量和效率。     

基于Solid Edge的链传动计算机辅助设计系统

链传动是机械传动的重要组成部分,本文在充分研究带传动设计理论的基础上,研究了用VB6.0作为工具,开发基于SolidEdge的链传动CAD系统的设计方案和实现方法。本系统实现了链传动设计与校核自动化,实现了链传动设计与绘图一体化,提高了设计的质量和效率。     

基于VB二次开发AutoCAD的机械传动CAD系统

以模块化设计和参数化设计为指导思想,以Visual Basic为编程语言和开发工具,对AutoCAD软件进行二次开发,研制出了界面友好的机械传动CAD系统.该系统包括普通V带传动系统、齿轮传动系统、链传动系统三个子系统.每个系统又包括设计子系统和绘图子系统,分别实现设计和绘图自动化.设计子系统和绘图子系统还能自动连接,实现设计与绘图的一体化.运用该机械传动CAD系统能提高以上几种机械传动装置设计和绘图的质量和效率.     

滚子链传动横向振动稳定性分析

基于多体动力学理论,建立了滚子链传动系统横向振动动力学模型。该模型考虑了链条张力及链节转动惯性对链系统横向振动的影响。在此基础上,通过算例仿真,对滚子链系统横向振动固有特性进行了研究,并分析了不同边界激励条件对滚子链传动系统横向振动稳定性的影响。研究结论可为指导各种含链传动系统的机械装置的动态分析与设计提供借鉴。     

大行程机械臂系统滚子链传动特性研究

针对目前机械臂传动系统设计制造成本较高,在一般简易场合使用局限等问题,给出一种基于滚子链传动的新型机械臂系统,并针对系统关键部件滚子链传动系统,通过运用多体动力学理论和拉格朗日方法,分析得到机械臂系统滚子链传动横向振动模态特性。研究结果表明:通过对比大行程滚子链传动与非滚子链传动机械臂运行特性,本模型所提出的具有制造成本较低新型机械臂系统方案可以较好地解决一般简易场合使用传统机械臂使用局限的问题;在理想轨迹下滚子链传动与非滚子链传动机械臂运行特性差异较小,满足一般对操作精度要求不高的机械臂使用要求;链传动横向振动各阶固有频率随着链长的增长而减小,传动速度对链传动横向振动影响较小,链条张力对链传动横向振动影响呈现线性变化关系,随着张力的增加固有频率也逐渐增加。     

低噪声链条橡胶滚子尺寸设计的有限元分析

新开发的低噪声链条，中间滚子为橡胶滚子，链传动啮合时，橡胶滚子先与链轮接触，受力变形。文中对橡胶滚子的受力变形用有限元法进行了分析和解释，得出了橡胶滚子被压缩到一定程度时，链轮齿开始与钢制滚子接触的结论，理论上验证了橡胶滚子设计的合理性。它为链传动设计中采用有限元进行分析的可行性提供了一种新的设计方法和理论依据。     

基于RecurDyn的精密滚子链传动的运动特性仿真分析

滚子链是一种用于传送机械动力链条,广泛应用于工业和农业机械。以08B型短节距精密滚子链的例,分析了常用滚子链的传动方式,并分别对链传动的运动特性、动载荷、传动效率等进行了仿真分析,仿真结果验证了链传动的基本特性,预测了其动载荷的大小及传动效率,与理论分析结果一致。该方法为工程中选择和应用链传动提供了依据,为选择其他滚子链的设计和选型提供了依据。     

链传动CAD系统的研制与开发

以模块化设计思想为指导,以Visual Basic 6．0的呵视化的、面向对象的编程语言为开发工具,开发用户界面友好的链传动CAD系统。该系统显著提高了设计与绘图的质量和效率。     

圆捆机打捆过程中的主链传动啮合受力分析与仿真

轮齿与链节间啮合力的计算是当前链传动动力学研究的热点领域之一,以滚子与轮齿啮合前后的局部变形能的转换为条件,推导出了链轮啮合受力的近似求解方程。以某型圆草捆卷捆机的主链传动为研究对象,在施加圆捆机正常打捆作业时负载转矩的条件下,仿真得到了圆捆机主链传动工作时动力学表征及一主多从链传动系统啮合过程中轮链的啮合受力,分析了该类链传动系统的动力学表征特性并验证了模型的有效性,对实际的农机具设计有较为实际的理论参考价值。     

基于AutoCAD用VB二次开发滚动轴承CAD系统

以模块化设计思想为指导,以Visual Basic为开发工具,对AutoCAD软件进行二次开发,研制出了用户界面友好的滚动轴承CAD系统。该系统实现了设计绘图一体化,显著提高了设计与绘图的质量和效率。     

重力影响下滚子链传动的横向振动分析

基于多自由度系统的振动理论,建立了竖直拉伸下滚子链传动系统横向振动动力学模型。考虑了链条重力及张力对链传动系统横向振动固有特性的影响,并利用M atlab软件对该系统横向振动固有频率进行了数值分析。在此基础上研究了不同边界激励条件对该链传动系统横向振动稳定性的影响。所得结论可为用于生产实践中的机械传动装置的动态分析与设计提供参考。     

基于虚拟样机技术的步进链传动系统动力学仿真研究

以步进链传动系统为研究对象,分析了该类系统的动力学特性及影响因素,构建了步进链传动系统虚拟样机模型,分析了该类系统采用不同步进运动规律及在不同预紧力状态下动力学特性的变化规律。通过计算机仿真,验证了虚拟样机模型的合理性与正确性,研究结果可为以链传动为执行机构的一类步进传动系统的动力学分析与设计提供借鉴。     

基于UG的链传动二次开发模块

分析了链传动建模的难点,以UG软件为平台开发了链传动整体建模模块。实现了链传动三维设计,解决了销轴模拟定位及链传动的模拟装配,从而获得实际中心矩、实际链节数、小链轮实际包角等实用数据。     

轧辊类零件CAD/CAPP集成系统研究

介绍适用于焊管轧辊类零件CAD/CAPP集成系统的功能及其参数化设计过程、绘图环境     

Clearance Influence on Dynamic Response of Intermittent Roller Chain Drive

The clearances appear in chain link hinges induced by manufacturing tolerance or wear of components are the most important factor that influences the dynamic performance of the intermittent roller chain drives.Due to the existence of the clearances in chain link hinges,the serious impact vibration phenomenon which influences the stability and the position accuracy of the chain drive system would be caused in the intermittent motion.But,the problem may be that a reasonable modeling on the chain with clearances is difficult due to the large clearance's number in chain system and the fact that the clearance' size are different.Currently,the studies on the dynamics of the intermittent roller chain considering the multi-clearance' joints are rare.Most research works have only focused on the constant moving chains.Taking the intermittent roller chain system as an object,this paper designs and builds the experimental device of this kind of mechanical system.The Longitudinal vibration response of the intermittent chain under the different motion laws was tested.The experimental study shows that the clearances presented in chain link hinges can cause severe impact vibration in the intermittent motion of chain.In subsequent work,the dynamic model of the intermittent roller chain system with the multi-clearance' joints was established.By calculating the dynamic response of this kind of mechanical system under the different motion laws,the effect of the clearances on the dynamic response of the intermittent chain drive system was analyzed.The theoretical simulation shows that the serious impact vibration phenomenon of the chain system can be caused by the clearances at the start accelerating period,and the chain drive system is often accompanied by the severe shock and vibration at the moment that the chain moves from the acceleration period to deceleration period.The research conclusions made by the experimental and theoretical studies indicate that the use of motion laws with small and continuous jerk at conversion point can effectively suppress the impact vibration at this point caused by clearances' effect.Additionally,the use of nonsymmetrical motion laws with small jerk approaching the end of the indexing period can obtain a smaller residual vibration.The presented motion law can provide an important reference for the improvement of the dynamic performance of the intermittent chain drive systems.     

Dynamic Modeling of a Roller Chain Drive System Considering the Flexibility of Input Shaft

Roller chain drives are widely used in various high-speed, high-load and power transmission applications, but their complex dynamic behavior is not well researched. Most studies were only focused on the analysis of the vibration of chain tight span, and in these models, many factors are neglected. In this paper, a mathematical model is developed to calculate the dynamic response of a roller chain drive working at constant or variable speed condition. In the model, the complete chain transmission with two sprockets and the necessary tight and slack spans is used. The effect of the flexibility of input shaft on dynamic response of the chain system is taken into account, as well as the elastic deformation in the chain, the inertial forces, the gravity and the torque on driven shaft. The nonlinear equations of movement are derived from using Lagrange equations and solved numerically. Given the center distance and the two initial position angles of teeth on driving and driven sprockets corresponding to the first seating roller on each side of the tight span, dynamics of any roller chain drive with two sprockets and two spans can be analyzed by the procedure. Finally, a numerical example is given and the validity of the procedure developed is demonstrated by analyzing the dynamic behavior of a typical roller chain drive. The model can well simulate the transverse and longitudinal vibration of the chain spans and the torsional vibration of the sprockets. This study can provide an effective method for the analysis of the dynamic characteristics of all the chain drive systems.     

蓄电池板栅连铸系统夹送机设计

设计了一种可自动调节辊缝和夹送力的蓄电池板栅夹送机,以实现蓄电池板栅连铸过程的夹送功能。根据设计原理,运用理论力学及欧拉公式对夹送辊张力、张力辊张力、夹送压力进行计算。通过带滑块座轴承和弹簧结合的方式控制上夹送辊工作位置进行辊缝调整。蓄电池板栅夹送机双驱动辊结构采用齿轮连杆机构进行动力传送,具有整体结构简单紧凑、运行平稳可靠等优点,可实现上下夹送辊等速率反向旋转的工作要求。     

Design and Analysis of the Gemini Chain System in Dual Clutch Transmission of Automobile

Chain drive system is widely used in the conditions of high-speed, overload, variable speed and load. Many studies are focused on the meshing theory and wear characteristics of chain drive system, but system design, analysis, and noise characteristics of the chain drive system are weak. System design and noise characteristic are studied for a new type Gemini chain of dual-clutch automatic transmission. Based on the meshing theory of silent chain, the design parameters of the Gemini chain system are calculated and the mathematical models and dynamic analysis models of the Gemini chain system are established. Dynamic characteristics of the Gemini chain system is simulated and the contact force of plate and pin, plate and sprockets, the chain tension forces, the transmission error and the stress of plates and pins are analyzed. According to the simulation results of the Gemini chain system, the noise experiment about system is carried out. The noise values are tested at different speed and load and spectral characteristics are analyzed. The results of simulation and experimental show that the contact forces of plate and pin, plate and sprockets are smaller than the allowable stress values, the chain tension force is less than ultimate tension and transmission error is limited in 1.2%. The noise values can meet the requirements of industrial design, and it is proved that the design and analysis method of the Gemini chain system is scientific and feasible. The design and test system is built from analysis to test of Gemini chain system. This research presented will provide a corresponding theoretical guidance for the design and dynamic characteristics and noise characteristics of chain drive system.