共查询到20条相似文献,搜索用时 93 毫秒
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曲轴圆角滚压强化系统设计 总被引:5,自引:0,他引:5
从曲轴圆角滚压强化的工艺要求出发,探讨了该工艺的实现方法,进而详述了该工艺实现的系统设计,对于曲轴圆角滚压强化系统设计的总体方案确定具有一定的参考价值. 相似文献
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曲轴圆角滚压强化工艺 总被引:4,自引:0,他引:4
圆角滚压是提高曲轴疲劳强度和综合机械性能的重要手段之一,文章从曲轴圆角滚压强化机理、工艺过程、滚压变形影响因素、滚压强化系统等几个方面作了较为详细的论述。 相似文献
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正发动机制造技术曲轴作为发动机的核心零部件,在发动机运转过程中,经受弯曲、扭转复合交变应力的恶劣工况,特别是工作中的冲击载荷,使它极易发生疲劳损坏。圆角滚压技术是一种经济而高效的曲轴强化方式,根据资料统计,锻钢轴经圆角滚压后疲劳性能可提高70%~150%,球铁曲轴经圆角滚压后疲劳性能可提高80%~180%,国外应用已十分普遍和成熟,国内主要受滚压设备影响(高性能的滚压设备十分昂贵),发展一直比较迟缓。随着国内球铁技术的发展,以及滚压设备的进 相似文献
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我厂生产的6105QA空压机曲轴的材料为球墨铸铁QT600—2,由于该部件在工作中承受频繁的交变冲击载荷以及恶劣的工作环境,经常使工件发生疲劳破坏。由图1曲轴结构图可知,6105QA空压机曲轴的连杆轴颈与曲柄的连接部位沿曲柄的侧截面的结构尺寸,是整个部件结构截面尺寸的最薄弱部位。该截 相似文献
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阐述了用滚压曲轴主轴颈和连杆颈圆角的方法,来提高曲轴抗疲劳强度及使用寿命,并介绍了滚压机床的总体设计方案及关键部件的结构设计。 相似文献
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MK10135曲轴斜角磨床液压系统改造设计 总被引:1,自引:1,他引:0
在20世纪90年代,东风汽车公司发动机厂为了生产EQ491i轻型车发动机(排量:1.993L,额定功率:76kW,转速:5200r/min),从德国引进了用于发动机五大件加工的全套二手设备。引进设备中的MK10135曲轴斜角磨床是由通用外圆磨床改装而成的,在国外已使用多年,进厂安装运行一段时间后陆续暴露出一些问题,影响零件加工质量。如引进的曲轴斜角磨床的液压油箱容积小,夏季连续运行时油液发热严重,加之液压元件陈旧老化,易发生内外泄漏, 相似文献
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Da-Wei Zhang Sheng-Dun Zhao 《The International Journal of Advanced Manufacturing Technology》2014,70(5-8):1455-1462
The research and implementation work for a new shaft part rolling process have been carried out in the present study, where the shaft has a thread and a small module spline or gear. This method is developed based on two-roll cross rolling technologies for thread and spline, and two round rolling dies provide special structure for synchronously forming thread and spline (or gear). In one rolling process, the threaded and splined (or geared) shapes on the different portions of shaft part are formed synchronously, and then the manufacturing cycle has been shortened and the relative phase between thread and spline (or gear) in mass production can be keep stable. Virtualizing practice of the new forming process for a shaft part with thread and spline was carried out by mean of FEM numerical simulation. The results indicated that the shapes of thread and spline being formed in one rolling process would be achieved by controlling the synchronous rolling process combining reasonable design for die structure. 相似文献
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In the fabrication and maintenance of hydroelectric turbines, the reconstruction by grinding of certain high-curvature surfaces such as junctions has not yet been robotized and must now be done manually. The problem is related to the very fast grinding wheel wear and the difficulty in controlling the position and orientation of the robot's grinder to adjust to changes in wheel shape. If the grinding wheel orientation is kept constant with respect to the workpiece, wheel-workpiece conformity increases, specific energy increases, the material removal rate drops and glazing of the wheel may occur. This article presents a method for controlling simultaneously the profile of both the workpiece and the grinding wheel. The orientation of the wheel is oscillated to maintain a constant wheel profile throughout its life and thus achieve better control in material removal. Research results provide the basis for robotic grinding tool profiling. 相似文献
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针对轧机轴承的外型尺寸大,淬火后容易变形的特点,安排了一次稳定回火、三次循环和一次磁力探伤,采用国外数控设备加工,经济合理地确定磨削留量及技术指标,生产出了高精度和高质量产品,满足了用户的需求,已形成批量生产。 相似文献
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一种磨削细长轴的工艺 总被引:1,自引:0,他引:1
在普通外圆磨床上磨削高精度、低粗糙度的细长轴较困难,因各种未知因素较多,精度较难控制—用万能表的电阻值来表示中心架支片与工件的接触状况,进行定量调整中心架,大大减少工件磨削中的弯曲变形,经生产实践证明,效果较好。 相似文献
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