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Edge surface grinding of CFRP composites using rotary ultrasonic machining: comparison of two machining methods

  • Yuanchen Li
  • Chengzu Ren
  • Hui Wang
  • Yingbin Hu
  • Fuda Ning
  • Xinlin Wang
  • Weilong CongEmail author
ORIGINAL ARTICLE
  • 58 Downloads

Abstract

Edge surface grinding has been widely applied in achieving functional surfaces and repairing the damage surfaces of carbon fiber–reinforced plastic (CFRP) composites especially with complex three-dimensional features. The conventional surface grinding (CSG) usually generates surface damages, leading to reduced service life and load-carrying capability of the parts. Therefore, there is a critical need to develop a surface grinding process of CFRP composites in a high-quality and high-efficiency way. Rotary ultrasonic machining (RUM) surface grinding has been proven to be such a process. In addition, RUM edge surface grinding can be conducted by up surface grinding or down surface grinding. However, the difference between up surface grinding and down surface grinding with RUM has not been reported. In this paper, the comparison between up surface grinding and down surface grinding with RUM is studied for the first time. The effects of the grinding parameters on machining performance, including cutting force, surface roughness, and surface morphology characteristics, are experimentally studied. The results show that the cutting forces in up grinding are obviously larger than those in down grinding. Lower surface roughness is generated by down grinding when grinding parameters are kept unchanged. The reasons for the differences of cutting forces and surface integrity are discussed. Surface morphologies suggest clearly that brittle fracture is the predominant material removal mode in grinding of CFRP composites. The chip size of the resin, the fracture size of the carbon fiber, and the material removal scale are smaller in down grinding. Furthermore, compared with CSG, the advantages of RUM surface grinding are presented. This investigation will provide useful guidance for surface grinding of CFRP composites.

Keywords

Rotary ultrasonic machining (RUM) Up/down surface grinding Carbon fiber–reinforced plastic (CFRP) composites Cutting force Machined surface integrity 

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Notes

Funding information

The work was supported by the U.S. National Science Foundation through the award CMMI-1538381.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory of Mechanism Theory and Equipment Design of Ministry of EducationTianjin UniversityTianjinPeople’s Republic of China
  2. 2.Department of Industrial, Manufacturing, and Systems EngineeringTexas Tech UniversityLubbockUSA
  3. 3.Department of Systems Science and Industrial EngineeringState University of New York at BinghamtonBinghamtonUSA

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