共查询到20条相似文献,搜索用时 140 毫秒
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目前关于桁架类产品的设计研究较少涉及其安装过程,传统的基于经验的安装模式很可能因为安装不得当,导致影响后续一系列同结构模块的安装质量,因此需要针对硬横跨的安装序列问题,优化安装流程,提高其安装效率和质量可靠性。本文研究了桁架类产品安装问题,提出了一种基于割集算法的启发式桁架装配序列规划方法。通过分析模型建立装配关联矩阵,简化装配关联矩阵减少安装序列搜索空间。使用基于启发式算法的割集发对简化之后装配关联图生成装配序列。最后使用单跨硬横跨模型为例生成安装序列,为硬横跨装配工艺设计提供了新的参考。 相似文献
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机器人用精密减速器是连接伺服电机与机械臂的传动部件,是机器人的三大核心零部件之一。为了保障机器人整体的性能,必须对机器人用精密减速器的性能进行全面的评测。常见的机器人用精密减速器性能试验台分为驱动模块、被试件安装模块和负载模块。其中,位于驱动端与负载端之间且被频繁更换的被试件安装模块的结构直接影响整个测试系统的同轴度和运行稳定性。介绍减速器性能试验台的结构特点,提出减速器被试件模块工装优化设计方案。大量装配测试证明,改进后的工装能使RV-E型减速器在装配过程中更容易达到高同轴度要求,在测试过程中运行更加平稳。 相似文献
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不确定环境下再制造发动机曲轴轴向间隙优化控制 总被引:1,自引:1,他引:0
再制造发动机曲轴轴向间隙既是影响再制造发动机性能的重要因素,也是不确定环境下再制造发动机装配过程质量控制的难点。以再制造发动机装配过程中曲轴轴向间隙优化控制为研究目标,分析不确定环境下再制造发动机曲轴轴向间隙影响因素,并构建基于信息熵的装配尺寸不确定测度模型,进而研究再制造发动机装配过程中曲轴轴向间隙质量耦合内在关系;在确保再制造发动机曲轴轴向间隙装配尺寸熵不大于新品的前提下,通过数学公式推导出再制造曲轴第一轴颈宽度和缸体轴承座宽度分级选配尺寸公差宽放系数;提出基于分级选配的再制造发动机曲轴轴向间隙优化控制方法;通过某再制造发动机企业的实例验证了该方法的有效性和可行性。 相似文献
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针对小口径弹药的弹壳与弹头装配过程的关键变量进行研究,提出了四个对装配性能有显著影响的指标:装配过盈量、同轴度误差、拔弹力和压装速度。首先根据小口径弹药装配性能的关键变量设计了一套完整的装配性能试验系统,包括执行机构、调整模组、完整的控制系统及各项子系统。而后设计了四个实验对指标应用模拟件对相关指标分别进行验证,通过试验平台的调整模组分别控制压装的同轴度误差和压装速度,通过反压机构对不同过盈量装配下的拔弹力进行测试,最后得到试验数据并分析,给出了小口径子弹装配的通用试验方法,指导小口径子弹的实际生产装配。 相似文献
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柔性版印刷机机构复杂、装配精度要求极高,无论是机架和辊筒的安装都将对其质量控制产生重要影响。本文针对单个机架的安装和多组机架水平安装等情况下的几种不同的同轴度误差以及影响进行了定性分析;并对柔性版印刷机辊筒类组件的装配误差提出了改善性措施。从而为提高柔性版印刷机整体安装质量和印刷精度提供重要参考。 相似文献
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虚拟环境下基于离散控制点的线缆装配规划技术 总被引:2,自引:1,他引:1
在对虚拟环境下的线缆装配规划的特点进行分析的基础上,提出虚拟环境下的线缆离散控制点建模以及虚拟环境下基于离散控制点的线缆装配规划方法。该方法通过对线缆离散控制点的单点、多点控制,可实现对整个线缆的可视化交互操作,能够比较清楚地描述线缆的空间位置、走向和装配路径,同时让规划人员直观地观察线缆与零部件之间的干涉情况,实现线缆的实时空间布置和装配过程仿真,为线缆的装配规划提供了一条有效的途径。目前该线缆装配规划软件系统已经在航天产品的装配工艺设计中得到试用,取得了良好效果。 相似文献
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因轴与轴承间同轴度误差、轴系间隙、机械加工精度、安装等因素,旋转式惯导系统会产生各种形式的安装误差。对各种安装关系进行了说明,详细推导并分析了系统存在安装误差时的输出特性及误差调制效应。在理论分析的基础上,针对实际旋转式惯导系统,通过分析主要误差源,建立合适的误差补偿模型,实现对相关误差的补偿。误差补偿结果表明,该补偿方案能同时消除陀螺敏感轴与旋转轴间的不正交误差、与比力相关的漂移以及因旋转而产生的周期性波动误差,具有很高的工程应用价值。 相似文献
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唇形油封的泄露是影响机器设备正常工作的质量问题之一,而此类封件泄露的主要原因是油封储存、取用、安装不当,本文通过分析唇形油封的结构和使用场合,从零部件储存、装配过程控制以及安装工装设计等方面阐述唇形油封装配过程中应该注意的事项,对工业生产中油封装配具有指导意义。 相似文献
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Ismail Fidan Edward Roush Serdar Tumkor Russell P. Kraft 《The International Journal of Advanced Manufacturing Technology》2006,27(5-6):561-567
Increasing product complexity, decreasing component size, and using double-sided boards have made surface mount technology
(SMT) based electronics manufacturing (EM) components more difficult to assemble. This has resulted in the economic troubleshooting
of EM defects being one of the main problems facing all manufacturers. Although the authors have made significant improvements
in the EM process, it has been shown that the implemented changes in the automated lines have not yet produced a high enough
percentage of reliable finished products. The objective of this current development is to make a contribution towards these
EM processes by creating an Internet-based intelligent system of circuit board defect detection so that EM process flaws that
necessitate rework operations can be identified prior to manufacturing runs. With the development of this system, the need
to rework the defective components will be minimized for any assembly line and assembly line process parameters, which cause
some reliability problems (such as solder balls, insufficient solder at joints, burnt joint connections, bridged leads, voids,
skewed leads, and unformed joints) will be troubleshot directly, and the rework will be greatly reduced from the EM assembly
line. This paper reports the current development and its structure. 相似文献
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联合U型装配线的平衡 总被引:1,自引:0,他引:1
联合U型装配线是准时化生产系统中实现少人化的一种设备布置方式。针对动态规划算法求解联合U型装配线平衡问题的局限性,提出了一种改进的启发式算法-动态阶位算法。实例表明,动态阶位算法计算效率高,对装配优先关系图中作业元素个数和优先矩阵的密度没有任何限制,平衡的结果等同于最优化结果,可以解决动态规划算法所不能求解的单一优先图中作业元素个数超过22个且具有稀疏优先矩阵的联合U型装配线的平衡问题。 相似文献
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F. Mas J. Ríos J. L. Menéndez A. Gómez 《The International Journal of Advanced Manufacturing Technology》2013,67(1-4):771-784
The need to develop methods and software applications to support the design of assembly lines is academically and industrially acknowledged. This paper focuses on the conceptual design of aeronautical assembly lines. A model is proposed to represent the process to design an aerostructure assembly line at the conceptual design phase and the knowledge requirements to support such process. The conceptual design process is documented in an Integrated Definition for Function Modeling model and the knowledge model is documented in Unified Modeling Language. The model provides a starting point in the formalization of the assembly line conceptual design. The objective is to use such model for the development of a knowledge-based application prototype in an industrially used software system. 相似文献
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Sang Hoon Kong Sang Do Noh Young-Geun Han Gibom Kim Kyo Il Lee 《The International Journal of Advanced Manufacturing Technology》2006,28(1-2):176-183
In recent years, the competition among manufacturers to reduce the development time of new products has been quite fierce.
At the same time, customers’ needs have become relatively diverse. Considering these facts, it is essential for manufacturers
to build an assembly line in the shortest time possible. Because an assembly line for varied and complex products involves
numerous workstations, assembly operations and resources, it is extremely difficult for assembly process planners to develop
an efficient assembly sequence and position. Thus, in order to overcome such complications, the best alternative is for a
number of process planners to develop a process plan synchronously .
This paper introduces a new process planning method for assembly lines based on a collaborative system. In it we propose an
agent-based collaborative process planning system, and to verify it, we implement the system in an Internet environment and
apply it to some practical case studies. 相似文献