共查询到20条相似文献,搜索用时 125 毫秒
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本文以美国AB公司的SLC系列可编程控制器为基础,取碳素工业的联锁控制系统的一个简单实例,论述了如何用SLC可编程控制器满足控制系统的要求,并给出了典型环节的逻辑梯形图。 相似文献
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介绍了新型W27Y-63A半自动液压弯管机工作原理、液压系统和控制系统,阐述了该弯管机的性能特点。 相似文献
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基于PLC绕线机控制系统设计 总被引:4,自引:3,他引:4
文章介绍了一种基于PLC控制的绕线系统。采用PLC接收控制信号和驱动执行机构,分析了由可编程控制器为核心的控制系统硬件结构以及PLC的控制程序设计。使绕线机缠绕细微漆包线控制准确、稳定。同时利用触摸屏提供了友好的人机界面,实现了绕线工艺的柔性化,工艺参数修改方便;实践证明,上述控制系统应用于绕线机具有操作简单,运行可靠,自动化程度高等优点。 相似文献
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对于汽车后桥壳的生产,由于焊接桥壳各项机械性能指标均优于铸造桥壳,所以世界各国汽车行业都在逐步淘汰铸造桥壳,而大力推广焊接桥壳。 相似文献
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从系统布置形式、变位机结构特性、气液增压系统特性、模具结构设计特点、模具快换结构设计几方面介绍了整套焊接系统的优点。与传统焊接方式相比,其突出特点是维护简单、通用性强、可实现多种半壳式后消声器互换生产,使工装系统的使用寿命延长,经济性提高。 相似文献
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Li-Ping Lei Jeong Kim Beom-Soo Kang 《International Journal of Machine Tools and Manufacture》2000,40(12):1691-1708
An FEM program, HydroFORM-3D, for the analysis and design of tube hydroforming processes, has been developed by modifying and adding some subroutines to the previous rigid-plastic finite element program, and then applied to the hydroforming process for an automobile rear axle housing. This paper includes the theoretical background of the program development. Through a numerical simulation, an optimum process is proposed to meet the practical requirements, which shows the efficiency of the numerical simulation. Two types of hydroforming dies are analyzed by numerical simulation. The sliding-type die has the drawback of a possibility of buckling, whereas the fixed-type die causes bursting failure. The thickness distribution of the final product is affected not only by the types of die, but also by the loading paths. The potential failure site for rear axle housing predicted by the numerical simulation is consistent with the experimental results. The values of maximum axial compression force for the first and second hydroforming processes are also in good agreement with experimental data. To manufacture a sound automobile rear axle housing without failure, it is better to use the sliding-type die and it is also critical to maintain a suitable hydraulic pressure level. 相似文献
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杨岳峰 《锻压装备与制造技术》2017,52(3)
汽车后桥壳横拉杆支架零件为精度要求较高的冲压件。为保证产品配合,零件尺寸要求高,且外形尺寸公差要求高。本文介绍一种新工艺方案,将原冲压工艺流程改为冲孔、落料一次到位,工艺基准统一,能有效保证产品质量,且大大提高生产效率。 相似文献
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