共查询到14条相似文献,搜索用时 125 毫秒
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超声研齿的材料去除机理与试验研究 总被引:3,自引:2,他引:3
提出了超声研磨螺旋锥齿轮的理论与方法,分析了超声研齿中磨粒锤击微切削、弹跳冲击与研磨液空化效应等材料去除机理。普通研齿与超声研齿对比试验证明,超声研齿材料去除率可达到普通研磨的3倍,且齿面质量明显提高,齿面表面粗糙度Ra达到0.2μm,轮廓支承长度率Rmr(c)=100%时的水平截距c为1.2μm。通过正交试验设计确定了超声研齿的最优工艺参数组合:小轮转矩为0.05N.m,转速为600r/min,研磨剂质量分数为20%;研磨剂质量分数利用材料去除率的影响最为显著,达到64.7%,其次为转速,贡献率为16.7%。对最优工艺参数进行了验证试验,证明材料去除率MR指标与预测值基本相符。 相似文献
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提出了超声研磨加工螺旋锥齿轮的理论与方法,利用声弹性理论分析了超声波在齿面传播与反射的机理。超声研齿的材料去除以塑性流动去除为主,机理可归结为磨粒锤击微切削、弹跳冲击与研磨液空化效应。试验证明,超声研齿的材料去除率为普通研齿加工的3倍,且齿面质量明显提高,齿面粗糙度Ra为0.2μm,水平截距c为1.2μm。最优工艺参数组合中转矩为0.12 N.m、转速为600 r/m in、研磨剂浓度为20%,其中转矩对材料去除率的影响最为显著,达到68.11%;其次为转速。对最优工艺参数组合所作的验证试验,材料去除率MRR指标与预测值基本相符。 相似文献
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选取齿数为7/37和8/41两对准双曲面齿轮作为实验对象,在改造过的滚动检查机Y9550上进行齿轮的超声研磨加工,超声振动频率16 kHz,超声研磨时间3 min。然后由JD45+测量机测试超声研齿前后齿面上45个点的偏移误差,再通过齿长或齿高方向的齿面误差分别计算出螺旋角或压力角误差。最后对比振动加工前后的齿面误差、螺旋角误差和压力角误差,研究结果表明,超声振动研齿能在一定程度上消除齿轮的齿面误差,改善齿轮的接触区位置与形状,提高齿轮的齿面平滑度,提高齿轮的加工质量,但也不能够进行过度研磨。 相似文献
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螺旋锥齿轮振动研磨的运动模型研究与分析 总被引:8,自引:3,他引:5
首次提出螺旋锥齿轮振动复合研齿法 ,建立了V/H与齿面啮合关系的数学模型与振动研齿法的运动学模型。利用TCA方法 ,通过对齿面的接触路径与印痕、齿面相对运动速度与研磨轨迹、切削速度数值仿真 ,证明该模型能对齿面研磨中接触路径与印痕进行准确的控制 ,振动研磨加工的质量效率明显优于传统方法 相似文献
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Sen YIN Yan BAO Yanan PAN Zhigang DONG Zhuji JIN Renke KANG 《Frontiers of Mechanical Engineering》2022,17(4):59
Nanoscale surface roughness of tungsten heavy alloy components is required in the nuclear industry and precision instruments. In this study, a high-performance ultrasonic elliptical vibration cutting (UEVC) system is developed to solve the precision machining problem of tungsten heavy alloy. A new design method of stepped bending vibration horn based on Timoshenko’s theory is first proposed, and its design process is greatly simplified. The arrangement and working principle of piezoelectric transducers on the ultrasonic vibrator using the fifth resonant mode of bending are analyzed to realize the dual-bending vibration modes. A cutting tool is installed at the end of the ultrasonic vibration unit to output the ultrasonic elliptical vibration locus, which is verified by finite element method. The vibration unit can display different three-degree-of-freedom (3-DOF) UEVC characteristics by adjusting the corresponding position of the unit and workpiece. A dual-channel ultrasonic power supply is developed to excite the ultrasonic vibration unit, which makes the UEVC system present the resonant frequency of 41 kHz and the maximum amplitude of 14.2 μm. Different microtopography and surface roughness are obtained by the cutting experiments of tungsten heavy alloy hemispherical workpiece with the UEVC system, which validates the proposed design’s technical capability and provides optimization basis for further improving the machining quality of the curved surface components of tungsten heavy alloy. 相似文献