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Date of Publication:2022-10-10

Journal:复合材料学报

Affiliation of Author(s):机械工程学院

Issue:12

Page Number:2757-2765

ISSN No.:1000-3851

Abstract:In order to investigate the drilling bitgeometry of carbon fiber reinforced composite (CFRP) laminates which achieves low defect, T800 CFRP laminates were studied by drilling experiments adopting four kinds of different geometry for drill bits. The effect of drill bit geometry on thrust force of drilling was analyzed. The relationship between thrust force of drilling and delamination damage was discussed. The results show that dropping speed of thrust force and outlet delamination factor have a good positive correlation. Dropping speed of thrust force can characterize the applicability of drill bit geometry to CFRP laminates drilling. In addition, the experiments show that cutting areas of drill bits which have multi-step geometric characters would cause thrust force returning to zero slowly in multi stages during drilling through the exit of the workpiece, and generating lower delamination factor at exit. ? 2016, BUAA Culture Media Group Ltd. All right reserved.

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