共查询到20条相似文献,搜索用时 60 毫秒
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根据试验结果,采用曲线拟合的方法,建立了工艺参数与扭矩之间的关系式。然后,从减小攻丝扭矩和提高攻丝效率的角度,对振动攻丝的一组工艺参数进行了优化。 相似文献
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振动攻丝动态切削力研究 总被引:7,自引:0,他引:7
分析攻丝时静态攻丝扭矩和动态攻丝扭矩的变化规律,研究动态切削力分析方法,探讨影响动态切削力变化的因素,通过试验研究动态切削力功率谱特点以及不同频率段信号能量的分布状况,结果动态切削力功率谱图可以反映攻丝过程,可以用信号功率谱峰变化和信号能量变化对攻丝过程进行监控。 相似文献
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低频振动攻丝提高加工精度的试验研究 总被引:1,自引:0,他引:1
根据振动理论对低频振动攻丝提高加工精度的动力学机理进行了理论分析和试验研究 ,阐明了低频振动攻丝时丝锥扭转振动的动力学特性。 相似文献
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Dynamic response behaviour of a rotating ring is investigated in order to better understand the achievable performance improvements
as well as system limitations. For this purpose, the governing equations that represent the transverse as well as the tangential
in-plane motion of a rotating ring are derived via the Hamilton’s principle. These equations are then discretized to represent
a two-degree-of-freedom time-varying gyroscopic system. The asymmetry effects are considered important and are included by
considering mass mismatch in the system mass matrix. In order to predict dynamic behaviour of a ring system subjected to external
excitation and body rotation, time and frequency response analyses are performed. The natural frequency variations due to
the gyroscopic coupling presented in the system are first characterized for varying input angular rates. The effects of system
parameters such as damping and mass mismatch on the sensor sensitivity and operating range are quantified via suitable time
and frequency response analyses. 相似文献
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低频振动切削作为一种新颖的加工方法,在机构加工中很有发展前途,用低频扭振攻丝方法加工螺纹具有显著优点,这里简要介绍了我们研究的低频扭振攻丝试验装置和试验结果,并对其结果进行了理论分析。 相似文献
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介绍了DDS开铁口机气动系统的两项改进措施,通过改进,提高了开铁口机的振打能力,彻底杜绝了振打时小车不动的故障。 相似文献
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This paper presents the results of a study of lubrication in form tapping and aims at a better understanding of its effect. It appears that lubrication is of paramount importance. Oil with efficient high pressure additives can reduce considerably the torque necessary to form the thread. Lubricants reduce the tool/work material friction during the forming process and, as a consequence, the resulting strain distribution and the strain hardening of the thread are affected. This investigation includes an analysis on the effects of additives in lubricants on the temperature during tapping, enabling correlation with the appearance of chemical elements of the oil which react with the thread material and contribute to lubrication. 相似文献
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通过合理有效地控制预紧量和预紧力的大小,可以改善装配零部件承受载荷的状态,从而提高机床的装配质量和装配精度,最终确保机床的加工精度和可靠性。 相似文献
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在双转台五轴数控机床结构的基础上,通过分析机床结构坐标系和CAM加工坐标系的关系,建立其机床加工刀头运动轨迹的数学模型,推导出该类型机床的后置处理转角计算公式和坐标转换计算公式。根据推导结果,在UG/PostBuilder通用后置处理器的基础上,针对不同类型五轴联动数控机床选配特定数控系统,设定机床参数、程序和刀轨参数、NC代码格式设置,编制了双转台式五轴数控机床的专用后置处理程序,经实际加工验证可以满足经济型五轴联动后置处理的要求。 相似文献