烧结机尾部星轮阻力矩装置的研究

烧结机回车道台车起拱是带式烧结机中普遍存在的问题,文中提出在烧结机尾部星轮轴上设置一液压阻力矩装置的构思,通过试验证明能够消除过剩力矩,从而减少由于烧结机尾部台车推力过大而引起的起拱现象。     

烧结机台车起拱现象的分析及处理研究

本文对烧结机台车起拱原因进行分析,并分析烧结机台车起拱的危害,阐述了起拱问题的处理措施,从而有效地降低了烧结机漏风率,延长了台车的使用年限。     

烧结机新型头尾星轮及复合齿形研究

在长期研究的基础上，为解决烧结机台车起拱而研制了一种新型烧结机星轮。从引入运动的匀速、加速条件入手，逐步形成齿廓曲线，构造星轮齿形。给出了该星轮的齿廓曲线方程及对应的计算机绘制的星轮及齿形，这为实现台车有序的加速、匀速的逻辑运动建立了理论基础。应用该理论制成的星轮齿形可以消除台车列的附加惯性力，减少台车起烘，从而减少漏风率。     

带式烧结机的传动、力学分析和仿真

工业用带式烧结机的星轮和台车的传动为齿轮一销齿条啮合传动。针对台车在运行过程中的起拱和速度波动等缺陷,对带式烧结机传动过程中星轮和台车相互之间的力学关系进行了分析。根据分析结果,给出了台车不起拱的系统力学模型,提出了新型无起拱平稳传动带式烧结机的力控制方法。采用该力学模型和力控制方法,结合工业实例,进行了解析计算和基于虚拟样机的运动仿真,计算和仿真的结果基本相符。由此得到了带式烧结机力控制阈值和力控制曲线。考虑力控制方法所设计的新型带式烧结机己经投入实际生产,应用效果表明所建立的模型理论正确、计算和仿真可靠、力控制方法有效。研究结果可以为今后带式烧结机的工程设计和应用提供理论依据。     

偶数齿形烧结机头尾星轮中心距的确定

偶数齿形烧结机头尾星轮中心距的确定邱坤胡由芳吕连山王振西１前言目前国内外烧结厂普遍采用的烧结机，无论是大、小型的，均为奇数齿烧结机，这类烧结机易出现台车起拱、脱轨、台车底端角磨损、台车装料烧结时漏风等弊病，从而影响烧结质量与产量。偶数齿烧结机正是为了...     

偶数齿烧结机星轮复合齿型

综合考虑偶数齿烧结机台车的运动学和动力学问题，提出了能使单辆台车产生变加速运动的新型齿型。根据台车进行变加速运动的速度、加速度和位移曲线，推导出了实际齿廓方程。利用该方程制造的新型星轮能够改善台车的逻辑运动，减小冲击，为制造无起拱烧结机奠定了基础。     

基于VC带式烧结机新型星轮CAD系统开发

采用新型星轮的带式烧结机可以有效避免台车“起拱”等现象,提高烧结质量。文中利用VC的MFC框架结构,基于相关新型星轮设计理论,开发了一套“带式烧结机新型星轮CAD系统”。试运行表明,该系统有很强的现实指导意义。     

带式烧结机台车执行牵引装置的力学分析与控制

通过分析带式烧结机台车执行牵引装置的星轮和台车的力学关系，建立了台车无叠肩起拱的力学模型，提出了无叠肩起拱带式烧结机的力控制方法。在对台车执行牵引装置进行力学计算和运动仿真的基础上，得到了新型60m^2带式烧结机的力控制阈值和力控制曲线。该新型烧结机生产线的现场试验表明，所建立的力学模型正确，计算和仿真可靠，提出的力控制方法能有效地解决台车的叠肩起拱问题。     

烧结机台车常见故障及解决措施

分析了烧结机台车在日常生产过程中出现的常见问题,并提出了各种问题的解决措施,从而降低了烧结机台车的故障率;有效提高了烧结机设备作业率。     

烧结机台车车轮故障原因分析及对策

针对烧结机台车车轮轴承高温、重载、冲击振动、粉尘冲刷和水冲淋的工况特点，对台车车轮轴承损坏的原因进行分析，通过改进台车车轮及轴承结构、改善台车车轮修复工艺、优化台车运行环境的方法来进一步提高台车车轮的寿命，提高设备的稳定性，同时降低设备修复费用。本文主要对烧结机台车车轮故障进行分析，采取相应对策改善轴承工况，提高车轮轴承使用寿命。     

五轴并联机床的输入输出速度和力

为解决五轴并联机床的角速度分量的非独立运动导致用速度矢量环法不能直接获得其输入输出速度关系,以及部分外力矩因受约束而不能由输入力来平衡,也将增加其输入输出力分析的难度问题,分析运动平台的运动特点,找到其角速度分量间的关系,得到五轴机床输入输出速度的关系。利用虚功原理,将不作虚功的约束力矩从外力矩中分离出来,得到五轴机床输入输出力的关系。这些分析方法对深入研究5自由度并联机床或并联机构具有较大的参考价值。     

烧结机运动原理及阻力矩新算法的试验研究

结合实验对烧结机的运动原理、受力状态等常规算法进行了剖析，研究并提出与其对应的新算法，描述并给出了相应的推导公式。新算法与烧结机的实际运动状态相一致，计算式的算值与烧结模型试验相吻合，可以供设计应用参考。     

塑料托盘在卷烟企业自动化立库中的应用与分析

通过对塑料托盘和木托盘两者优缺点的具体论述,论证了塑料托盘必将取代木托盘大规模使用.论文以某卷烟厂自动化立体高架库上所用塑料托盘的设计为例,针对塑料托盘在高架库上运行必须具备的条件和所受的制约,重点就承重、尺寸、防滑、变形量、刚性等方面进行具体分析和设计,设计后经过均载强度试验,证明完全能制造出适应自动化立体高架库标准要求的塑料托盘.实际应用中也证明塑料托盘在卷烟企业自动化立体高架库上的运行是可行的.     

Capacity optimization of flexible manufacturing systems under budget constraints

The capacity of a flexible manufacturing system (FMS) is optimized with the objective to maximize the system's throughput, while a budget constraint is considered. Decisions are performed on the capacity of machine groups (sets of identical machines), the transportation system and, in case of a significant cost impact, the number of pallets in the system. Throughput evaluation is achieved either by an open finite queueing network or by a closed queueing network if the number of pallets is included in the decision process. For both cases the solution procedure is based on the marginal allocation scheme.     

直接磁悬浮永磁直线电动机运行机理研究

为了消除直线电动机数控机床进给系统的摩擦阻力,实现无摩擦进给,提出了一种靠自身产生的磁悬浮力来解决数控机床进给系统的悬浮问题的新型直接磁悬浮永磁直线同步电动机。采用虚位移法建立其瞬态场中推力及磁悬浮力解析表达式,并且利用有限元软件ANSOFT对电动机进行了建模及分析,将解析计算结果与ANSOFT的计算结果进行比较,证明了采用虚位移法所建立模型的正确性,同时仿真结果也证明该直接磁悬浮永磁直线电动机自身可以产生解耦的并且可控的推力和悬浮力,实现无摩擦进给。     

An investigation of pallet design using alternative materials for cold room applications

This paper presents an investigation into the improvement of existing design and materials for pallets used in material handling applications. The objective was to develop a pallet design made from alternative materials such as composites of recycled corrugated paperboard and plywood for cold room lifting needs. Several new designs are proposed and analysed using the finite element method (FEM) and related information of weight, loading and safety conditions. Among these, five designs are recommended – one is made of plywood, two are made of corrugated paperboard, and two are made of specially constructed composite materials. The selection process aimed to ensure pallets were safe and stable and involved checking for maximum deflection while lifting and for catastrophe failure due to maximum stresses under Rankine’s theory of failure. We conclude that plywood, corrugated paperboard and a composite of the two materials can be utilised successfully to manufacture stable and strong pallets. Using FEM analysis and simulation studies on Pro/Mechanica FEM software, we were able to suggest several optimum designs with one-third the weight and all of the functionality of traditional pallets.     

The optimal configuration and workload allocation problem in flexible manufacturing systems

In this article we consider the problem of determining the minimum cost configuration (number of machines and pallets) for a flexible manufacturing system with the constraint of meeting a prespecified throughput, while simultaneously allocating the total workload among the machines (or groups of machines). Our procedure allows consideration of upper and lower bounds on the workload at each machine group. These bounds arise as a consequence of precedence constraints among the various operations and/or limitations on the number or combinations of operations that can be assigned to a machine because of constraints on tool slots or the space required to store assembly components. Earlier work on problems of this nature assumes that the workload allocation is given. For the single-machine-type problem we develop an efficient implicit enumeration procedure that uses fathoming rules to eliminate dominated configurations, and we present computational results. We discuss how this procedure can be used as a building block in solving the problem with multiple machine types.     

ANALYSIS OF METHOD FOR DETERMINING AZIMUTH OF PRINCIPAL AXIS OF INERTIA BASED ON DYNAMIC BALANCE MEASUREMENT

The dynamic balance quality of a rotating object is an important factor to maintain the stability and accuracy for motion. The azimuth of the principal axis of inertia is a major sign of dynamic balance. A usual method is measuring moment of inertia matrix relative to some base coordinates on a rotary inertia machine so as to calculate the azimuth of principal axis of inertia. By using the measured unbalance results on the two trimmed planes on a vertical hard bearing double-plane dynamic balancing machine, the dimension and direction of couple unbalance can be found. An azimuth angle formula for the principal axis of inertia is derived and is solved by using unbalance quantities. The experiments indicate that method based on dynamic balancing measurement is proved rational and effective and has a fine precision.