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纵扭共振旋转超声端铣碳纤维复合材料的试验研究
Experimental Study on Longitudinal-torsional Resonance Rotary Ultrasonic Face Milling of CFRP
 [PDF]

童志强,皮钧
- , 2016,
Abstract: 碳纤维复合材料加工中易产生分层、毛刺、撕裂等缺陷,是难加工材料。通过建立超声端铣碳纤维复合材料模型,分析两种角度下端铣碳纤维复合材料机理。采用纵扭共振旋转超声端铣和普通端铣碳纤维复合材料进行试验研究。试验结果表明:纵扭共振旋转超声端铣下,碳纤维复合材料已加工表面平整,刀具磨损少;而普通端铣条件下的已加工表面沟槽、凹坑较多,刀具磨损较大;超声端铣效果优于普通端铣。
The processing of carbon fiber reinforced composites(CFRP) is easy to produce layered, glitches, tearing and other defects. CFRP are difficult to machine. To establish a model for the ultrasonic face milling of CFRP is used to analyze the milling mechanism of CFRP under two kinds of angle. Experimental research was carried out for both the longitudinal-torsional resonance rotary ultrasonic face milling and the traditional face milling of CFRP. The experimental results showed that under the longitudinal-torsional resonance rotary ultrasonic milling conditions, CFRP surface has been processed was roughness, tool less wear. The grooves, pits were more on the processed under the conditions of normal face milling, tool seriously wear. Ultrasonic milling was better than ordinary milling
钻头铣口机  [PDF]
地质与勘探 , 1973,
Abstract: 过去用手锯切割钻头水口,不仅劳动强度大,而且比较费时费料.101队在"双革"中制成了一种钻头铣口机,大大改善了割制钻头水口的劳动条件.这种铣口机的动力系由中间轴带动,所以铣口机体积小了.总重为30公斤左右;其效率是十几分钟可铣一个水口.
旋风铣头  [PDF]
地质与勘探 , 1976,
Abstract: 旋风铣头是加工螺杆泵转子的专用动力头,装在C620车床大溜板上,主轴增加蜗轮减速箱,使转速下降到1转/分.操作简单,铣出的转子质量好.主要性能:加工光洁度达6级加工螺杆最大直径φ110毫米
纵扭复合型超声电机预压力和输出扭矩的关系  [PDF]
孙合明,郭辉
摩擦学学报 , 2001,
Abstract: 建立了纵扭复合型超声电机定子和转子之间的接触模型,根据模型讨论了预压力、纵振激振电压、扭振激振电压、摩擦力及电机能提供的最大扭矩之间的关系。指出在一定的条件下,施加某一预压力时电机的输出扭矩最大。所得计算结果和实验结果基本吻合。
楔形直杆纵扭自振频率的近似计算
盖秉政
力学与实践 , 1980,
Abstract: 众所周知,楔形直杆纵、扭自振频率通常是用直接法来求的.但为得到一定的精度,振型函数必须选择得好,同时计算量也要加大.刘先志教授提出用 Bessel 方程精确求解的途径,取得了精确解.进一步他又从柱函数的渐近展
楔形直杆纵扭自振频率的近似计算  [PDF]
盖秉政
力学与实践 , 1980, DOI: 10.6052/1000-0992-1980-069
Abstract: 众所周知,楔形直杆纵、扭自振频率通常是用直接法来求的.但为得到一定的精度,振型函数必须选择得好,同时计算量也要加大.刘先志教授提出用Bessel方程精确求解的途径,取得了精确解.进一步他又从柱函数的渐近展...
组合型带肋扁扭壳的广义变分原理及内力分析  [PDF]
罗恩邵卓民魏文郎林春哲
力学学报 , 1978, DOI: 10.6052/0459-1879-1978-2-1978-014
Abstract: 本文给出了组合型带肋扁扭壳广义变分原理的三种表达式,以及用应力函数φ和挠度w为变量的混合型广义变分式.根据这些广义变分式导出了十字脊线处的衔接条件.应用变分差分法,从以φ和w为变量的混合型广义变分式出发,求得了各种常用边界条件下的有矩理论解.本文理论分析结果得到了模型试验的证实,并已应用于实际工程中.附录中给出了组合型扭壳与边拱协同工作的广义势能原理表达式.
斜槽式纵扭模态转换型超声电机在不同摩擦副下的负载特性研究  [PDF]
杨淋,丁庆军,黄卫清,赵淳生
中国电机工程学报 , 2010,
Abstract: 研究斜槽式纵扭模态转换型超声电机在各种类型摩擦副下的负载特性。实验中定/转子接触面分别采用多种材料,形成硬/软、软/硬以及硬/硬搭配的各种摩擦副。当采用软/硬摩擦副时,电机转速慢、转矩小、效率低,而采用硬/软摩擦副时,电机负载特性明显提高。研究定子摩擦面开齿对电机的影响,实验显示定子摩擦面开齿能显著改善定转子摩擦面磨损情况,使电机运行平稳,电机负载特性较不开齿有所提高。实际研制的直径为15mm的样机,堵转力矩可达0.32N×m,空载转速最高达1325r/min,效率达到了32.3%。
一种新型纵扭复合超声振动系统的研究
Study on A New Type of Longitudinal-torsional Composite Ultrasonic Vibration System
 [PDF]

唐军,赵波
- , 2015,
Abstract: 提出了一种新型纵扭复合超声振动系统的设计方法,并应用有限元软件对其正确性进行仿真验证。利用矩阵传输理论得出了指数过渡变幅杆的纵扭共振频率方程及放大倍数,其间利用MATLAB软件对此频率方程进行了求解;然后通过对圆棒中有纵扭复合振动时的应力状况进行分析,得出了一种新型的纵扭同频激励方式。按此法设计纵扭复合超声振动系统,并应用有限元软件ANSYS进行模态分析与瞬态动力学分析。结果表明:有限元分析与理论计算结果吻合较好。
A new design method for longitudinal-torsional composite of the ultrasonic vibration system was put forward and the finite element software ANSYS was used to validate this method. Firstly, based on the transfer matrix theory, the resonance frequency equations and the vibration velocity amplification coefficient for the longitudinal-torsional composite vibration of the horn were derived. Meanwhile, the resonance frequency equations were solved by using the software of MATLAB. Then, stress states of the rod when the longitudinal and torsional vibration travels in the rod were studied, and a new incentive mechanism for longitudinal and torsional vibration mode was put forward. Finally, a new type of longitudinal-torsional composite of the ultrasonic vibration system was designed and its dynamic characteristics were calculated using ANSYS. Results show that the calculated resonant frequencies agree well with the designed frequencies, and the longitudinal vibration frequency and torsional vibration frequency are almost equal to each other
纵-扭复合振动超声深滚加工残余应力场数值分析
Numerical Analysis of Residual Stress Field in Ultrasonic Deep Rolling Process with Longitudinal-torsional Vibration
 [PDF]

郑建新,段玉涛
- , 2017,
Abstract: 为研究平面试件在纵-扭复合振动超声深滚加工后材料应力分布及变化规律,采用有限元方法对Q345钢进行了纵-扭复合振动超声深滚加工残余应力场数值模拟。首先分析了加工后试件材料各应力分量沿深度方向的分布情况,然后研究了静压力、滚压速度、振幅和相位差对加工后材料残余应力的影响规律。结果表明:经纵-扭复合振动超声深滚加工后材料表层残余应力分布较均匀,表面为压应力,压应力沿试件深度方向先增后减;试件最大残余压应力及最大横向残余压应力深度和残余压应力层深度随静压力的增大而增大,随滚压速度的增大而减小,而表面残余压应力和最大纵向残余压应力深度无显著变化;试件横向残余压应力层深度随振幅的增加小幅度地增大,但最大残余压应力幅值和深度和纵向残余压应力层深度几无变化;相位差对残余应力影响可忽略不计。
To explore the stress distribution and laws induced by ultrasonic deep rolling with longitudinal-torsional (UDRP-LTV) vibration, the finite element method was adopted to study the residual stress in Q345 steel. The distribution of the component stress along the depth direction was studied, and the effects of the static pressure, rolling speed, longitudinal and torsional vibration amplitude on the residual stress were analyzed. The results show that the distribution of the residual stress in the surface layer is homogeneous after UDRP-LTV treatment, and the surface stress is compressive. The compressive stress firstly increases and then decreases along the depth. The maximum residual stress and the depth of the residual stress layer increase with the increasing of static force, and decrease with the increasing of rolling speed, while the surface residual stress and the depth of the maximum longitudinal residual stress slightly change. The depth of the transverse residual stress slightly increases with the increasing of amplitude, but the amplitude and depth of the maximum surface residual stress and the depth of the longitudinal residual stress slightly change. And the effect of the phase on the residual stress may be ignored
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