• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2020, Vol. 56 ›› Issue (1): 213-222.doi: 10.3901/JME.2020.01.213

Previous Articles     Next Articles

Investigation of Milling Process of Foam Metal with High Porosity for Pore Structure Protection

ZHOU Wei1, LIU Yangxu1, CHU Xuyang1, CHEN Lu2   

  1. 1. Department of Mechanical&Electrical Engineering, Xiamen University, Xiamen 361005;
    2. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150006
  • Received:2019-04-26 Revised:2019-08-19 Online:2020-01-05 Published:2020-03-09

Abstract: To protect the pore structure of foam metal in the machining process, a new milling method is proposed that different filling materials are used for solidification of pore structure. Taking copper foam as an example, the milling experiments are performed with different filling materials and processing parameters, and then surface morphology is analyzed based on the SEM results. Conformal rate of pore structure and pore crest as well as the permeability are used to evaluate the processing quality of milling process of foam metal. Using a central composite experimental design method, the quadratic regression equations are established to obtain the optimized milling parameters based on the pore size and the flow rate at fixed pressure of 0.7 kPa. The results show that better conformal effect is obtained with the hydrogenated rosin and sodium stearate at a ratio of 4:1. With the increase of cutting speed and feed rate, the conformal rate of pore structure and pore crest as well as the permeability are firstly increased and then decreased. Moreover, when the optimized processing parameters with a cutting speed of 311 r/min and a feed rate of 165 mm/min are adopted, conformal rate of pore structure of 96.3%, flow rate of 97.5% with the pressure of 0.7 kPa and better permeability are obtained. In this way, the best conformal effect is obtained with optimized filling materials in the milling process of foam metal.

Key words: foam metal, milling, pore structure, conformal rate, permeability

CLC Number: