REVIEW ARTICLE


Analysis of Modeling and Vibration Performance of a New Type of Cropping Machine



Lijun Zhang1, *, Shengdun Zhao2
1 College of Electromechanical Engineering, China University of Petroleum, Qingdao, China, 266580
2 School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, China, 710049


© 2014 Zhang and Zhao

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the College of Electromechanical Engineering, China University of Petroleum, Qingdao, China, 266580; Tel: 086-0532-86983500; E-mail: Zlj-2@163.com


Abstract

In order to reduce the cropping force and enhance the cropping cross-section quality, a new type of cropping machine is proposed in this paper. The basic structure and working principle of the cropping machine are introduced. Based on D'Alembert's principle, the vibration equations of the cropping machine along the Y direction, the X direction and around X, Y, Z axes are built in detail and the motion curves of the vibration body in all directions are also obtained. The amplitude frequency response characteristic curve of the vibration body in the Y direction is given and the resonance frequency of the vibration body in the Y direction is about 7.94 rad/s. The cropping experimental results show that the cropping force acted on the metal bar is low and the cross-section quality is very high.

Keywords: Precision cropping, Vibration mechanism, Amplitude frequency response, Excited frequency.