| Research on a new type of precision cropping method with variable frequency vibration |
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| 引用本文： | 化春键 赵升吨 张学来. Research on a new type of precision cropping method with variable frequency vibration[J]. 西安交通大学学报(英文版), 2007, 19(2): 172-176 |
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| 作者姓名： | 化春键 赵升吨 张学来 |
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| 作者单位： | [1]School of Mechanical Engineering, Xi＇an Jiaotong University , Xi＇an 710049, China [2]School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China |
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| 摘 要： |
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| 关 键 词： | 精密下料方法 可变频率振动 工业生产 频率控制 |
| 文章编号： | 1671-8267（2007）02-0172-05 |
Research on a new type of precision cropping method with variable frequency vibration |
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| Hua Chunjian,Zhao Shengdun,Zhang Xuelai. Research on a new type of precision cropping method with variable frequency vibration[J]. Academic Journal of Xi’an Jiaotong University, 2007, 19(2): 172-176 |
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| Authors: | Hua Chunjian Zhao Shengdun Zhang Xuelai |
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| Abstract: | Aiming at the cropping operations widely applied in practical industry production, a new method of bar cropping is presented. The rotational speeds of actuating motor of eccentric blocks are controlled by a frequency changer, and the shearing die provides the bar with the controllable force, frequency and amplitude of vibration. By utilizing the stress concentration at the bottom of V shape groove on the bar, the low stress bar cropping is realized. The bar cropping experiments of duralumin alloy and steel show that the shear surface has no radial distortion and deviation angle, the cutting force is lower and the die life is longer compared with the common bar cropping method. According to the special feature of cutting surface obtained by the new method, a new method of measurement is proposed and applied to assess the cutting surfaces obtained by the different control curves of frequency. The results show that the linear decrease control method is the best. |
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| Keywords: | bar cropping vibration variable frequency |
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